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Zoom Meeting SDK Windows

AnthropicOfficialCreated by ZoomDistributed by Anthropic

  • Skill
  • Tool integration
  • Software development
  • MIT
  • Low risk

From the author

Zoom Meeting SDK for Windows - Native C++ SDK for embedding Zoom meetings into Windows desktop applications. Supports custom UI architecture with raw video/audio data, headless bots, and deep integration with meeting features. Includes SDK architecture patterns and Windows message loop handling.
— the description by Zoom

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The Zoom Meeting SDK for Windows provides a native C++ interface for embedding Zoom meeting functionality directly into desktop applications. It supports a wide range of use cases, from building custom meeting UIs to creating headless bots for automated tasks. The SDK utilizes a controller-based architecture where developers implement event listeners to handle meeting lifecycle events, audio/video streams, and other features. Proper integration requires careful management of the Windows message loop to ensure callbacks are processed correctly and adherence to specific project structure guidelines.

What it does

  • Enables embedding Zoom meetings within native Windows desktop applications.
  • Supports headless bot development for automated meeting participation.
  • Provides access to raw audio and video data streams for custom processing.
  • Offers a consistent controller-based pattern for accessing 35+ meeting features.
  • Allows for custom UI rendering or standard SDK-provided interfaces.
  • Facilitates local recording and advanced meeting management controls.

When to use it

  • When building a custom Windows desktop application that requires integrated video conferencing.
  • When developing automated bots that need to join Zoom meetings to perform tasks.
  • When you need low-level access to raw audio/video frames from a Zoom meeting.
  • When you need to build a custom meeting interface that deviates from the standard Zoom client UI.

Advantages

  • Native C++ performance for resource-intensive media processing.
  • Full control over the meeting UI and user experience.
  • Universal architecture pattern simplifies implementing diverse features.
  • Supports both UI-based applications and headless background services.

Usage examples

“How do I initialize the Zoom Meeting SDK in my C++ Windows application?”
You must create an InitParam object, configure the web domain and language settings, and call the InitSDK function, ensuring you handle the return status for success.
“Why are my Zoom SDK callbacks not firing in my Windows app?”
This is typically caused by a missing Windows message loop. You must implement a PeekMessage/DispatchMessage loop to allow the SDK to process asynchronous callbacks.
“How can I capture raw video from a meeting participant?”
You must start raw recording, create an IZoomSDKRenderer, and subscribe to the specific user's video stream using the renderer, then implement the IZoomSDKRendererDelegate to receive frames.
“What is the recommended project structure for a Zoom SDK Windows app?”
Use a native Visual Studio .vcxproj project, organize SDK files into x64/x86 subdirectories, and ensure your config.json is included in the project for easy access.

Install

  1. Download the skill as a ZIP:

    https://mp-staging.autogineer.com/agent-skills/anthropics/zoom-meeting-sdk-windows/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip zoom-meeting-sdk-windows.zip -d .agents/skills

Documentation by Zoom

Zoom Meeting SDK (Windows)

Embed Zoom meeting capabilities into Windows desktop applications for native C++ integrations and headless bots.

New to Zoom SDK? Start Here!

The fastest way to master the SDK:

  1. SDK Architecture Pattern - Learn the universal pattern that works for ALL 35+ features

  2. Authentication Pattern - Get a working bot joining meetings

  3. Windows Message Loop - Fix the #1 reason callbacks don't fire

Building a Custom UI?

Having issues?

Prerequisites

  • Zoom app with Meeting SDK credentials (Client ID & Secret)

  • Visual Studio 2019/2022 or later

  • Windows 10 or later

  • C++ development environment

  • vcpkg for dependency management

Need help with authentication? See the zoom-oauth skill for JWT token generation.

Project Preferences & Learnings

IMPORTANT: These are hard-won preferences from real project experience. Follow these when creating new projects.

Do NOT use CMake — Use native Visual Studio .vcxproj

Always create a native Visual Studio .sln + .vcxproj project, not a CMake project. Reasons:

  • More standard and familiar for Windows C++ developers

  • Developers can double-click the .sln to open in Visual Studio immediately

  • Project settings (include dirs, lib dirs, preprocessor defines) are easier to see and edit in the VS Property Pages UI

  • No extra CMake tooling or configuration step required

  • Friendlier and easier for developers to understand and maintain

config.json must be visible in Solution Explorer

The config.json file (containing sdk_jwt, meeting_number, passcode) must be:

  1. Included in the .vcxproj as a <None> item with <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

  2. Placed in a "Config" filter in the .vcxproj.filters file so it appears under a "Config" folder in Solution Explorer

  3. Easily editable by developers directly from Solution Explorer — they should never have to hunt for it in File Explorer

Example .vcxproj entry:

<ItemGroup>
  <None Include="config.json">
    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  </None>
</ItemGroup>

Example .vcxproj.filters entry:

<ItemGroup>
  <Filter Include="Config">
    <UniqueIdentifier>{GUID-HERE}</UniqueIdentifier>
  </Filter>
</ItemGroup>
<ItemGroup>
  <None Include="config.json">
    <Filter>Config</Filter>
  </None>
</ItemGroup>

Overview

The Windows SDK is a C++ native SDK designed for:

  • Desktop applications - Native Windows apps with full UI control

  • Headless bots - Join meetings without UI

  • Raw media access - Capture/send audio/video streams

  • Local recording - Record meetings locally or to cloud

Key Architectural Insight

The SDK follows a universal 3-step pattern for every feature:

  1. Get controller (singleton): meetingService->Get[Feature]Controller()

  2. Implement event listener: class MyListener : public I[Feature]Event { ... }

  3. Register and use: controller->SetEvent(listener) then call methods

This works for ALL features: audio, video, chat, recording, participants, screen sharing, breakout rooms, webinars, Q&A, polling, whiteboard, and 20+ more!

Learn more: SDK Architecture Pattern Guide

Quick Start

1. Download Windows SDK

Download from Zoom Marketplace:

  • Extract zoom-meeting-sdk-windows_x86_64-{version}.zip

2. Setup Project Structure
your-project/
  YourApp/
    SDK/
      x64/
        bin/          # DLL files and dependencies
        h/            # Header files
        lib/          # sdk.lib
      x86/
        bin/
        h/
        lib/
    YourApp.cpp
    YourApp.vcxproj
    config.json

Copy SDK files:

xcopy /E /I sdk-package\x64 your-project\YourApp\SDK\x64\
xcopy /E /I sdk-package\x86 your-project\YourApp\SDK\x86\
3. Install Dependencies (vcpkg)
# Install vcpkg
git clone https://github.com/Microsoft/vcpkg.git C:\vcpkg
cd C:\vcpkg
.\bootstrap-vcpkg.bat
.\vcpkg integrate install

# Install dependencies
.\vcpkg install jsoncpp:x64-windows
.\vcpkg install curl:x64-windows
4. Configure Visual Studio Project

Project Properties → C/C++ → General → Additional Include Directories:

$(SolutionDir)SDK\$(PlatformTarget)\h
C:\vcpkg\packages\jsoncpp_x64-windows\include
C:\vcpkg\packages\curl_x64-windows\include

Project Properties → Linker → General → Additional Library Directories:

$(SolutionDir)SDK\$(PlatformTarget)\lib

Project Properties → Linker → Input → Additional Dependencies:

sdk.lib

Post-Build Event (Copy DLLs to output):

xcopy /Y /D "$(SolutionDir)SDK\$(PlatformTarget)\bin\*.*" "$(OutDir)"
5. Configure Credentials

Create config.json:

{
  "sdk_jwt": "YOUR_JWT_TOKEN",
  "meeting_number": "1234567890",
  "passcode": "password123",
  "zak": ""
}
6. Build & Run
  • Open solution in Visual Studio

  • Select x64 or x86 configuration

  • Press F5 to build and run

Core Workflow

┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│  InitSDK    │───►│  AuthSDK    │───►│ JoinMeeting │───►│ Raw Data    │
│             │    │  (JWT)      │    │             │    │ Subscribe   │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘
                         │                   │
                         ▼                   ▼
                   OnAuthComplete      onInMeeting
                     callback           callback

⚠️ CRITICAL: Add Windows message loop or callbacks won't fire!

while (!done) {
    MSG msg;
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    std::this_thread::sleep_for(std::chrono::milliseconds(100));
}

See: Windows Message Loop Guide

Code Examples

💡 Pro Tip: These are minimal examples. For complete, tested code see:

Important: Include Order

CRITICAL: Include headers in this exact order or you'll get build errors:

#include <windows.h>      // MUST be first
#include <cstdint>         // MUST be second (SDK headers use uint32_t)
// ... other standard headers ...
#include <zoom_sdk.h>
#include <meeting_service_components/meeting_audio_interface.h>  // BEFORE participants!
#include <meeting_service_components/meeting_participants_ctrl_interface.h>

See: Build Errors Guide for all dependency fixes.

1. Initialize SDK
#include <windows.h>
#include <cstdint>
#include <zoom_sdk.h>

using namespace ZOOM_SDK_NAMESPACE;

bool InitMeetingSDK() {
    InitParam initParam;
    initParam.strWebDomain = L"https://zoom.us";
    initParam.strSupportUrl = L"https://zoom.us";
    initParam.emLanguageID = LANGUAGE_English;
    initParam.enableLogByDefault = true;
    initParam.enableGenerateDump = true;
    
    SDKError err = InitSDK(initParam);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"InitSDK failed: " << err << std::endl;
        return false;
    }
    return true;
}
2. Authenticate with JWT
#include <windows.h>
#include <cstdint>
#include <auth_service_interface.h>
#include "AuthServiceEventListener.h"

IAuthService* authService = nullptr;

void OnAuthenticationComplete() {
    std::cout << "Authentication successful!" << std::endl;
    JoinMeeting();  // Proceed to join meeting
}

bool AuthenticateSDK(const std::wstring& jwtToken) {
    CreateAuthService(&authService);
    if (!authService) return false;
    
    // Set event listener BEFORE calling SDKAuth
    authService->SetEvent(new AuthServiceEventListener(&OnAuthenticationComplete));
    
    // Authenticate with JWT
    AuthContext authContext;
    authContext.jwt_token = jwtToken.c_str();
    
    SDKError err = authService->SDKAuth(authContext);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"SDKAuth failed: " << err << std::endl;
        return false;
    }
    
    // CRITICAL: Add message loop or callback won't fire!
    // See complete example: examples/authentication-pattern.md
    
    return true;
}

AuthServiceEventListener.h:

#include <windows.h>
#include <cstdint>
#include <auth_service_interface.h>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class AuthServiceEventListener : public IAuthServiceEvent {
public:
    AuthServiceEventListener(void (*onComplete)()) 
        : onAuthComplete(onComplete) {}
    
    void onAuthenticationReturn(AuthResult ret) override {
        if (ret == AUTHRET_SUCCESS && onAuthComplete) {
            onAuthComplete();
        } else {
            std::cout << "Auth failed: " << ret << std::endl;
        }
    }
    
    // Must implement ALL pure virtual methods (6 total)
    void onLoginReturnWithReason(LOGINSTATUS ret, IAccountInfo* info, LoginFailReason reason) override {}
    void onLogout() override {}
    void onZoomIdentityExpired() override {}
    void onZoomAuthIdentityExpired() override {}
#if defined(WIN32)
    void onNotificationServiceStatus(SDKNotificationServiceStatus status, SDKNotificationServiceError error) override {}
#endif

private:
    void (*onAuthComplete)();
};

See complete working code: Authentication Pattern Guide

3. Join Meeting
#include <meeting_service_interface.h>
#include "MeetingServiceEventListener.h"

IMeetingService* meetingService = nullptr;

void OnMeetingJoined() {
    std::cout << "Joining meeting..." << std::endl;
}

void OnInMeeting() {
    std::cout << "In meeting now!" << std::endl;
    // Start raw data capture here
}

void OnMeetingEnds() {
    std::cout << "Meeting ended" << std::endl;
}

bool JoinMeeting(UINT64 meetingNumber, const std::wstring& password) {
    CreateMeetingService(&meetingService);
    if (!meetingService) return false;
    
    // Set event listener
    meetingService->SetEvent(
        new MeetingServiceEventListener(&OnMeetingJoined, &OnMeetingEnds, &OnInMeeting)
    );
    
    // Prepare join parameters
    JoinParam joinParam;
    joinParam.userType = SDK_UT_WITHOUT_LOGIN;
    
    JoinParam4WithoutLogin& params = joinParam.param.withoutloginuserJoin;
    params.meetingNumber = meetingNumber;
    params.userName = L"Bot User";
    params.psw = password.c_str();
    params.isVideoOff = false;
    params.isAudioOff = false;
    
    SDKError err = meetingService->Join(joinParam);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"Join failed: " << err << std::endl;
        return false;
    }
    return true;
}

MeetingServiceEventListener.h:

#include <windows.h>
#include <cstdint>
#include <meeting_service_interface.h>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class MeetingServiceEventListener : public IMeetingServiceEvent {
public:
    MeetingServiceEventListener(
        void (*onJoined)(),
        void (*onEnded)(), 
        void (*onInMeeting)()
    ) : onMeetingJoined(onJoined), 
        onMeetingEnded(onEnded),
        onInMeetingCallback(onInMeeting) {}
    
    void onMeetingStatusChanged(MeetingStatus status, int iResult) override {
        if (status == MEETING_STATUS_CONNECTING) {
            if (onMeetingJoined) onMeetingJoined();
        }
        else if (status == MEETING_STATUS_INMEETING) {
            if (onInMeetingCallback) onInMeetingCallback();
        }
        else if (status == MEETING_STATUS_ENDED) {
            if (onMeetingEnded) onMeetingEnded();
        }
    }
    
    // Must implement ALL pure virtual methods (9 total)
    void onMeetingStatisticsWarningNotification(StatisticsWarningType type) override {}
    void onMeetingParameterNotification(const MeetingParameter* param) override {}
    void onSuspendParticipantsActivities() override {}
    void onAICompanionActiveChangeNotice(bool isActive) override {}
    void onMeetingTopicChanged(const zchar_t* sTopic) override {}
    void onMeetingFullToWatchLiveStream(const zchar_t* sLiveStreamUrl) override {}
    void onUserNetworkStatusChanged(MeetingComponentType type, ConnectionQuality level, unsigned int userId, bool uplink) override {}
#if defined(WIN32)
    void onAppSignalPanelUpdated(IMeetingAppSignalHandler* pHandler) override {}
#endif

private:
    void (*onMeetingJoined)();
    void (*onMeetingEnded)();
    void (*onInMeetingCallback)();
};

See all required methods: Interface Methods Guide

4. Subscribe to Raw Video
#include <windows.h>
#include <cstdint>
#include <rawdata/zoom_rawdata_api.h>
#include <rawdata/rawdata_renderer_interface.h>
#include <zoom_sdk_raw_data_def.h>  // REQUIRED for YUVRawDataI420
#include "ZoomSDKRendererDelegate.h"

IZoomSDKRenderer* videoHelper = nullptr;
ZoomSDKRendererDelegate* videoSource = new ZoomSDKRendererDelegate();

bool StartVideoCapture(uint32_t userId) {
    // STEP 1: Start raw recording FIRST (required!)
    IMeetingRecordingController* recordCtrl = 
        meetingService->GetMeetingRecordingController();
    
    SDKError canStart = recordCtrl->CanStartRawRecording();
    if (canStart != SDKERR_SUCCESS) {
        std::cout << "Cannot start recording: " << canStart << std::endl;
        return false;
    }
    
    recordCtrl->StartRawRecording();
    
    // Wait for recording to initialize
    std::this_thread::sleep_for(std::chrono::milliseconds(500));
    
    // STEP 2: Create renderer
    SDKError err = createRenderer(&videoHelper, videoSource);
    if (err != SDKERR_SUCCESS || !videoHelper) {
        std::cout << "createRenderer failed: " << err << std::endl;
        return false;
    }
    
    // STEP 3: Set resolution and subscribe
    videoHelper->setRawDataResolution(ZoomSDKResolution_720P);
    err = videoHelper->subscribe(userId, RAW_DATA_TYPE_VIDEO);
    if (err != SDKERR_SUCCESS) {
        std::cout << "Subscribe failed: " << err << std::endl;
        return false;
    }
    
    std::cout << "Video capture started! Frames arrive in onRawDataFrameReceived()" << std::endl;
    return true;
}

ZoomSDKRendererDelegate.h:

#include <windows.h>
#include <cstdint>
#include <rawdata/rawdata_renderer_interface.h>
#include <zoom_sdk_raw_data_def.h>
#include <fstream>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class ZoomSDKRendererDelegate : public IZoomSDKRendererDelegate {
public:
    void onRawDataFrameReceived(YUVRawDataI420* data) override {
        if (!data) return;
        
        // YUV420 (I420) format: Y plane + U plane + V plane
        int width = data->GetStreamWidth();
        int height = data->GetStreamHeight();
        
        // Calculate buffer sizes
        // Y = full resolution, U/V = quarter resolution each
        size_t ySize = width * height;
        size_t uvSize = ySize / 4;  // (width/2) * (height/2)
        
        // Total size: width * height * 1.5 bytes
        
        // Save to file (playback: ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 output.yuv)
        std::ofstream outputFile("output.yuv", std::ios::binary | std::ios::app);
        outputFile.write(data->GetYBuffer(), ySize);    // Brightness
        outputFile.write(data->GetUBuffer(), uvSize);   // Blue-difference
        outputFile.write(data->GetVBuffer(), uvSize);   // Red-difference
        outputFile.close();
    }
    
    void onRawDataStatusChanged(RawDataStatus status) override {
        std::cout << "Raw data status: " << status << std::endl;
    }
    
    void onRendererBeDestroyed() override {
        std::cout << "Renderer destroyed" << std::endl;
    }
};

Complete video capture guide: Raw Video Capture Guide

5. Subscribe to Raw Audio
#include <rawdata/rawdata_audio_helper_interface.h>

class ZoomSDKAudioRawDataDelegate : public IZoomSDKAudioRawDataDelegate {
public:
    void onMixedAudioRawDataReceived(AudioRawData* data) override {
        // Process PCM audio (mixed from all participants)
        std::ofstream pcmFile("audio.pcm", std::ios::binary | std::ios::app);
        pcmFile.write((char*)data->GetBuffer(), data->GetBufferLen());
        pcmFile.close();
    }
    
    void onOneWayAudioRawDataReceived(AudioRawData* data, uint32_t node_id) override {
        // Process audio from specific participant
    }
};

// Subscribe to audio
IZoomSDKAudioRawDataHelper* audioHelper = GetAudioRawdataHelper();
audioHelper->subscribe(new ZoomSDKAudioRawDataDelegate());
6. Main Message Loop (CRITICAL!)

⚠️ WITHOUT THIS, CALLBACKS WON'T FIRE!

#include <windows.h>
#include <thread>
#include <chrono>

int main() {
    // Initialize COM
    CoInitialize(NULL);
    
    // Load config and initialize
    LoadConfig();
    InitMeetingSDK();
    AuthenticateSDK(sdk_jwt);
    
    // CRITICAL: Windows message loop for SDK callbacks
    // SDK uses Windows message pump to dispatch callbacks
    // Without this, callbacks are queued but NEVER fire!
    MSG msg;
    while (!g_exit) {
        // Process all pending Windows messages
        while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_QUIT) {
                g_exit = true;
                break;
            }
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        
        // Small sleep to avoid busy-waiting
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }
    
    // Cleanup
    CleanSDK();
    CoUninitialize();
    
    return 0;
}

Why message loop is critical: The SDK uses Windows COM/messaging for async callbacks. Without PeekMessage(), the SDK queues messages but they're never retrieved/dispatched, so callbacks never execute.

Symptoms without message loop:

  • Authentication timeout (even with valid JWT)

  • Meeting join timeout

  • No callback events fire

  • Appears like network/auth issue but it's a message loop issue

See detailed explanation: Windows Message Loop Guide

Common Issues & Solutions

IssueSolution
Callbacks don't fire / Auth timeoutAdd Windows message loop → Guide
uint32_t / AudioType errorsFix include order → Guide
Abstract class errorImplement all virtual methods → Guide
How to implement [feature]?Follow universal pattern → Guide
Authentication failsCheck JWT token & error codes → Guide
No video frames receivedCall StartRawRecording() first → Guide

Complete troubleshooting: Common Issues Guide

How to Implement Any Feature

The SDK has 35+ feature controllers (audio, video, chat, recording, participants, screen sharing, breakout rooms, webinars, Q&A, polling, whiteboard, captions, AI companion, etc.).

Universal pattern that works for ALL features:

  1. Get the controller (singleton):

    IMeetingAudioController* audioCtrl = meetingService->GetMeetingAudioController();
    IMeetingChatController* chatCtrl = meetingService->GetMeetingChatController();
    // ... 33 more controllers available
  2. Implement event listener (observer pattern):

    class MyAudioListener : public IMeetingAudioCtrlEvent {
        void onUserAudioStatusChange(IList<IUserAudioStatus*>* lst) override {
            // React to audio events
        }
        // ... implement all required methods
    };
  3. Register and use:

    audioCtrl->SetEvent(new MyAudioListener());
    audioCtrl->MuteAudio(userId, true);  // Use feature

Complete guide with examples: SDK Architecture Pattern

Available Examples

ExampleDescription
SkeletonDemoMinimal join meeting - start here
GetVideoRawDataSubscribe to raw video streams
GetAudioRawDataSubscribe to raw audio streams
SendVideoRawDataSend custom video as virtual camera
SendAudioRawDataSend custom audio as virtual mic
GetShareRawDataCapture screen share content
LocalRecordingLocal MP4 recording
ChatDemoIn-meeting chat functionality
CaptionDemoClosed caption/live transcription
BreakoutDemoBreakout room management

Detailed References

🎯 Core Concepts (START HERE!)
📚 Complete Examples
🔧 Troubleshooting Guides
📖 References
🎨 Feature-Specific Guides
  • ../references/breakout-rooms.md - Programmatic breakout room management

  • ../references/ai-companion.md - AI Companion controls

Sample Repositories

RepositoryDescription
meetingsdk-windows-raw-recording-sampleOfficial raw data capture samples
meetingsdk-windows-local-recording-sampleLocal recording with Docker

Playing Raw Video/Audio Files

Raw YUV/PCM files have no headers - you must specify format explicitly.

Play Raw YUV Video
ffplay -video_size 1280x720 -pixel_format yuv420p -f rawvideo output.yuv
Convert YUV to MP4
ffmpeg -video_size 1280x720 -pixel_format yuv420p -f rawvideo -i output.yuv -c:v libx264 output.mp4
Play Raw PCM Audio
ffplay -f s16le -ar 32000 -ac 1 audio.pcm
Convert PCM to WAV
ffmpeg -f s16le -ar 32000 -ac 1 -i audio.pcm output.wav
Combine Video + Audio
ffmpeg -video_size 1280x720 -pixel_format yuv420p -f rawvideo -i output.yuv ^
       -f s16le -ar 32000 -ac 1 -i audio.pcm ^
       -c:v libx264 -c:a aac -shortest output.mp4

Key flags:

FlagDescription
-video_size WxHFrame dimensions (e.g., 1280x720)
-pixel_format yuv420pI420/YUV420 planar format
-f rawvideoRaw video input (no container)
-f s16leSigned 16-bit little-endian PCM
-ar 32000Sample rate (Zoom uses 32kHz)
-ac 1Mono (use -ac 2 for stereo)

Authentication Requirements (2026 Update)

Important: Beginning March 2, 2026, apps joining meetings outside their account must be authorized.

Use one of:

  • App Privilege Token (OBF) - Recommended for bots (app_privilege_token in JoinParam)

  • ZAK Token - Zoom Access Key (userZAK in JoinParam)

  • On Behalf Token - For specific use cases (onBehalfToken in JoinParam)

📖 Complete Documentation Library

This skill includes comprehensive guides created from real-world debugging:

🎯 Start Here
📚 By Category

Core Concepts:

Complete Examples:

Troubleshooting:

References:

  • Interface Methods - All required virtual methods (6 auth + 9 meeting)

  • Windows Reference - Platform setup

  • Authorization - JWT generation

  • Bot Authentication - Bot token types

  • Breakout Rooms - Breakout room API

  • AI Companion - AI features

🚨 Most Critical Issues (From Real Debugging)
  1. Callbacks not firing → Missing Windows message loop (99% of issues)

  2. Build errors → SDK header dependencies (uint32_t, AudioType, etc.)

  3. Abstract class errors → Missing virtual method implementations

💡 Key Insight

Once you learn the 3-step pattern, you can implement ANY of the 35+ features:

  1. Get controller → 2. Implement event listener → 3. Register and use

See: SDK Architecture Pattern

Official Resources


Documentation Version: Based on Zoom Windows Meeting SDK v6.7.2.26830

Need help? Start with SKILL.md for complete navigation.

Merged from meeting-sdk/windows/SKILL.md

Zoom Windows Meeting SDK - Complete Documentation Index

🚀 Quick Start Path

If you're new to the SDK, follow this order:

  1. Read the architecture pattern → concepts/sdk-architecture-pattern.md

    • This teaches you the universal formula that applies to ALL features

    • Once you understand this, you can implement any feature by reading the .h files

  2. Fix build errors → troubleshooting/build-errors.md

    • SDK header dependencies issues

    • Required include order

  3. Implement authentication → examples/authentication-pattern.md

    • Complete working JWT authentication code

  4. Fix callback issues → troubleshooting/windows-message-loop.md

    • CRITICAL: Why callbacks don't fire without Windows message loop

    • This was the hardest issue to diagnose!

  5. Implement virtual methods → references/interface-methods.md

    • Complete lists of all required methods

    • How to avoid abstract class errors

  6. Capture video (optional) → examples/raw-video-capture.md

    • YUV420 format explained

    • Complete raw data capture workflow

  7. Troubleshoot any issues → troubleshooting/common-issues.md

    • Quick diagnostic checklist

    • Error code tables

    • "If you see X, do Y" reference


📂 Documentation Structure

meeting-sdk/windows/
├── SKILL.md                           # Main skill overview
├── SKILL.md                           # This file - navigation guide
│
├── concepts/                          # Core architectural patterns
│   ├── sdk-architecture-pattern.md   # THE MOST IMPORTANT DOC
│   │                                  # Universal formula for ANY feature
│   ├── singleton-hierarchy.md        # Navigation guide for SDK services
│   │                                  # 4-level deep service tree, when/how
│   ├── custom-ui-architecture.md     # How Custom UI rendering works
│   │                                  # Child HWNDs, D3D, layout, events
│   └── custom-ui-vs-raw-data.md      # SDK-rendered vs self-rendered
│                                      # Decision guide for Custom UI approach
│
├── examples/                          # Complete working code
│   ├── authentication-pattern.md     # JWT auth with full code
│   ├── raw-video-capture.md          # Video capture with YUV420 details
│   │                                  # Recording vs Streaming, permissions
│   ├── custom-ui-video-rendering.md  # Custom UI with video container
│   │                                  # Active speaker + gallery layout
│   ├── breakout-rooms.md             # Complete breakout room guide
│   │                                  # 5 roles, create/manage/join
│   ├── chat.md                       # Send/receive chat messages
│   │                                  # Rich text, threading, file transfer
│   ├── captions-transcription.md     # Live transcription & closed captions
│   │                                  # Multi-language translation
│   ├── local-recording.md            # Local MP4 recording
│   │                                  # Permission flow, encoder monitoring
│   ├── share-raw-data-capture.md     # Screen share raw data capture
│   │                                  # YUV420 frames from shared content
│   └── send-raw-data.md              # Virtual camera/mic/share
│                                      # Send custom video/audio/share
│
├── troubleshooting/                   # Problem solving guides
│   ├── windows-message-loop.md       # CRITICAL - Why callbacks fail
│   ├── build-errors.md               # Header dependency fixes + MSBuild
│   └── common-issues.md              # Quick diagnostic workflow
│
└── references/                        # Reference documentation
    ├── interface-methods.md           # Required virtual methods
    │                                  # Auth(6) + Meeting(9) + CustomUI(13)
    ├── windows-reference.md           # Platform setup
    ├── authorization.md               # JWT generation
    ├── bot-authentication.md          # Bot token types
    ├── breakout-rooms.md              # Breakout room features
    └── ai-companion.md                # AI Companion features

🎯 By Use Case

I want to build a meeting bot
  1. SDK Architecture Pattern - Understand the pattern

  2. Authentication Pattern - Join meetings

  3. Windows Message Loop - Fix callback issues

  4. Interface Methods - Implement callbacks

I'm getting build errors
  1. Build Errors Guide - SDK header dependencies

  2. Interface Methods - Abstract class errors

  3. Common Issues - Linker errors

I'm getting runtime errors
  1. Windows Message Loop - Callbacks not firing

  2. Authentication Pattern - Auth timeout

  3. Common Issues - Error code tables

I want to build a Custom UI meeting app
  1. Custom UI Architecture - How SDK rendering works

  2. SDK-Rendered vs Self-Rendered - Choose your approach

  3. Custom UI Video Rendering - Complete working code

  4. Interface Methods - 13 Custom UI virtual methods

  5. Build Errors Guide - MSBuild from git bash

I want to capture video/audio
  1. Raw Video Capture - Complete video workflow

    • Recording vs Streaming approaches

    • Permission requirements (host, OAuth tokens)

    • Audio PCM capture

  2. Share Raw Data Capture - Screen share capture

    • Subscribe to RAW_DATA_TYPE_SHARE

    • Handle dynamic resolution

  3. SDK Architecture Pattern - Controller pattern

  4. Common Issues - No frames received

I want to use breakout rooms
  1. Breakout Rooms Guide - Complete breakout room workflow

    • 5 roles: Creator, Admin, Data, Assistant, Attendee

    • Create, configure, manage, join/leave rooms

  2. Common Issues - Breakout room error codes

I want to implement chat
  1. Chat Guide - Send/receive messages

    • Rich text formatting (bold, italic, links)

    • Private messages and threading

    • File transfer events

I want to use live transcription
  1. Captions & Transcription Guide - Live transcription

    • Automatic speech-to-text

    • Multi-language translation

    • Manual closed captions (host feature)

I want to record meetings
  1. Local Recording Guide - Local MP4 recording

    • Permission request workflow

    • zTscoder.exe encoder monitoring

    • Gallery view vs active speaker

I want to implement a specific feature
  1. SDK Architecture Pattern - START HERE!

  2. Find the controller in SDK/x64/h/meeting_service_interface.h

  3. Find the header in SDK/x64/h/meeting_service_components/

  4. Follow the universal pattern: Get controller → Implement listener → Use methods

I want to understand the SDK architecture
  1. SDK Architecture Pattern - Complete architecture overview

  2. Singleton Hierarchy - Navigate the service tree (4 levels)

  3. Interface Methods - Event listener pattern

  4. Authentication Pattern - Service pattern


🔥 Most Critical Documents

1. SDK Architecture Pattern (⭐ MASTER DOCUMENT)

concepts/sdk-architecture-pattern.md

This is THE most important document. It teaches the universal 3-step pattern:

  1. Get controller (singleton pattern)

  2. Implement event listener (observer pattern)

  3. Register and use

Once you understand this pattern, you can implement any of the 35+ features by just reading the SDK headers.

Key insight: The Zoom SDK follows a perfectly consistent architecture. Every feature works the same way.


2. Windows Message Loop (⚠️ MOST COMMON ISSUE)

troubleshooting/windows-message-loop.md

99% of "callbacks not firing" issues are caused by missing Windows message loop. This document explains:

  • Why SDK requires PeekMessage() loop

  • How to implement it correctly

  • How to diagnose callback issues

This was the hardest bug to find during development (took ~2 hours).


3. Build Errors Guide

troubleshooting/build-errors.md

SDK headers have dependency bugs that cause build errors. This document provides:

  • Required include order

  • Missing <cstdint> fix

  • Missing AudioType fix

  • Missing YUVRawDataI420 fix


📊 By Document Type

Concepts (Why and How)
Examples (Complete Working Code)
Troubleshooting (Problem Solving)
References (Lookup Information)
  • Interface Methods - Required virtual methods

  • Windows Reference - Platform setup

  • Authorization - JWT generation

  • Bot Authentication - Bot tokens

  • Breakout Rooms - Breakout room API

  • AI Companion - AI features


💡 Key Learnings from Real Debugging

These documents were created from actual debugging of a non-functional Zoom SDK sample. Here are the key insights:

Critical Discoveries:
  1. Windows Message Loop is MANDATORY (not optional)

    • SDK uses Windows message pump for callbacks

    • Without it, callbacks are queued but never fire

    • Manifests as "authentication timeout" even with valid JWT

    • See: Windows Message Loop Guide

  2. SDK Headers Have Dependency Bugs

    • Missing #include <cstdint> in SDK headers

    • meeting_participants_ctrl_interface.h doesn't include meeting_audio_interface.h

    • rawdata_renderer_interface.h only forward-declares YUVRawDataI420

    • See: Build Errors Guide

  3. Include Order is CRITICAL

    • <windows.h> must be FIRST

    • <cstdint> must be SECOND

    • Then SDK headers in specific order

    • See: Build Errors Guide

  4. ALL Virtual Methods Must Be Implemented

    • Including WIN32-conditional methods

    • SDK v6.7.2 requires 6 auth methods + 9 meeting methods

    • Different versions have different requirements

    • See: Interface Methods Guide

  5. The Architecture is Beautifully Consistent

    • Every feature follows the same 3-step pattern

    • Controllers are singletons

    • Event listeners use observer pattern

    • Once you learn the pattern, you can implement any feature

    • See: SDK Architecture Pattern


🎓 Learning Path by Skill Level

Beginner (Never used Zoom SDK)
  1. Read SDK Architecture Pattern to understand the overall design

  2. Follow Authentication Pattern to join your first meeting

  3. Reference Common Issues when you hit problems

Intermediate (Familiar with SDK basics)
  1. Deep dive into SDK Architecture Pattern - implement multiple features

  2. Learn Raw Video Capture for media processing

  3. Use Interface Methods as reference

Advanced (Building production bots)
  1. Study SDK Architecture Pattern - learn to implement ANY feature

  2. Master Windows Message Loop - understand async callback flow

  3. Reference SDK headers directly using the universal pattern


🔍 How to Find What You Need

"My code won't compile"

→ Build Errors Guide

"Authentication times out"

→ Windows Message Loop

"Callbacks never fire"

→ Windows Message Loop

"Abstract class error"

→ Interface Methods

"How do I implement [feature]?"

→ SDK Architecture Pattern

"How do I join a meeting?"

→ Authentication Pattern

"How do I capture video?"

→ Raw Video Capture

"What error code means what?"

→ Common Issues - Comprehensive error code tables (SDKERR, AUTHRET, Login, BO, Phone, OBF)

"How do I use breakout rooms?"

→ Breakout Rooms Guide

"How does the SDK work?"

→ SDK Architecture Pattern

"How do I navigate to a specific controller/feature?"

→ Singleton Hierarchy

"How do I send/receive chat messages?"

→ Chat Guide

"How do I use live transcription?"

→ Captions & Transcription Guide

"How do I record locally?"

→ Local Recording Guide

"How do I capture screen share?"

→ Share Raw Data Capture


📝 Document Version

All documents are based on Zoom Windows Meeting SDK v6.7.2.26830.

Different SDK versions may have:

  • Different required callback methods

  • Different error codes

  • Different API behavior

If using a different version, use grep "= 0" SDK/x64/h/*.h to verify required methods.


Remember: The SDK Architecture Pattern is the fastest way to understand how the Windows Meeting SDK fits together. Read it first if you are debugging custom UI or event flow issues.

Operations

  • RUNBOOK.md - 5-minute preflight and debugging checklist.

Files

examples/authentication-pattern.md

Authentication Flow Pattern

Complete guide to authenticating with the Zoom Windows SDK using JWT tokens.


Overview

Authentication is the first required step before joining meetings. The SDK uses JWT (JSON Web Token) authentication for Meeting SDK apps.

Flow Sequence
1. Initialize SDK (InitSDK)
2. [OPTIONAL] Register Network Connection Handler for proxy detection
   2a. Wait for onProxyDetectComplete() callback
3. Create Auth Service (CreateAuthService)
4. Set Event Listener (SetEvent)
5. Call SDKAuth with JWT token
6. Process Windows messages (CRITICAL!)
7. Wait for onAuthenticationReturn callback
8. Create Meeting Service (CreateMeetingService)
9. Join/Start meeting
10. Wait for MEETING_STATUS_INMEETING callback
11. NOW safe to use controllers (GetMeetingAudioController, etc.)
State Machine
┌──────────────┐    InitSDK()     ┌──────────────┐
│   UNINITIALIZED  │ ─────────────► │  INITIALIZED   │
└──────────────┘                 └───────┬──────┘
                                         │
                                         │ CreateAuthService() + SDKAuth()
                                         ▼
┌──────────────┐  onAuthenticationReturn ┌──────────────┐
│    MEETING      │ ◄─────────────────── │ AUTHENTICATING │
│    READY        │   (AUTHRET_SUCCESS)  └──────────────┘
└───────┬──────┘
        │
        │ Join() or Start()
        ▼
┌──────────────┐  onMeetingStatusChanged ┌──────────────┐
│   IN MEETING    │ ◄─────────────────── │   JOINING     │
│ (Controllers OK)│ (MEETING_STATUS_     └──────────────┘
└──────────────┘   INMEETING)

Complete Working Example

#include <windows.h>
#include <cstdint>
#include <zoom_sdk.h>
#include <auth_service_interface.h>
#include <iostream>
#include <chrono>
#include <thread>

using namespace ZOOM_SDK_NAMESPACE;

// Global state
bool g_authenticated = false;
bool g_exit = false;
IAuthService* g_authService = nullptr;

// Step 1: Create Event Listener
class MyAuthListener : public IAuthServiceEvent {
public:
    void onAuthenticationReturn(AuthResult ret) override {
        std::cout << "[AUTH] Callback received! Result: " << ret << std::endl;
        
        switch (ret) {
        case AUTHRET_SUCCESS:
            std::cout << "[AUTH] Authentication successful!" << std::endl;
            g_authenticated = true;
            break;
        case AUTHRET_KEYORSECRETEMPTY:
            std::cerr << "[AUTH] ERROR: SDK Key or Secret is empty" << std::endl;
            break;
        case AUTHRET_JWTTOKENWRONG:
            std::cerr << "[AUTH] ERROR: JWT token is invalid" << std::endl;
            break;
        case AUTHRET_OVERTIME:
            std::cerr << "[AUTH] ERROR: Authentication timeout" << std::endl;
            break;
        case AUTHRET_NETWORKISSUE:
            std::cerr << "[AUTH] ERROR: Network connection issue" << std::endl;
            break;
        default:
            std::cerr << "[AUTH] ERROR: Unknown error: " << ret << std::endl;
        }
    }
    
    void onLoginReturnWithReason(LOGINSTATUS ret, IAccountInfo* info, LoginFailReason reason) override {
        // Not used for JWT auth
    }
    
    void onLogout() override {
        std::cout << "[AUTH] Logged out" << std::endl;
    }
    
    void onZoomIdentityExpired() override {
        std::cout << "[AUTH] Zoom identity expired" << std::endl;
    }
    
    void onZoomAuthIdentityExpired() override {
        std::cout << "[AUTH] Zoom auth identity expired" << std::endl;
    }
    
    #if defined(WIN32)
    void onNotificationServiceStatus(SDKNotificationServiceStatus status, 
                                     SDKNotificationServiceError error) override {
        std::cout << "[AUTH] Notification service status: " << status << std::endl;
    }
    #endif
};

// Step 2: Initialize SDK
bool InitializeSDK() {
    std::cout << "[1/3] Initializing SDK..." << std::endl;
    
    InitParam initParam;
    initParam.strWebDomain = L"https://zoom.us";
    initParam.strSupportUrl = L"https://zoom.us";
    initParam.emLanguageID = LANGUAGE_English;
    initParam.enableLogByDefault = true;
    initParam.enableGenerateDump = true;
    
    SDKError err = InitSDK(initParam);
    if (err != SDKERR_SUCCESS) {
        std::cerr << "ERROR: InitSDK failed: " << err << std::endl;
        return false;
    }
    
    std::cout << "SDK initialized successfully" << std::endl;
    return true;
}

// Step 3: Authenticate
bool AuthenticateSDK(const std::wstring& jwt_token) {
    std::cout << "[2/3] Authenticating..." << std::endl;
    
    // Create auth service
    SDKError err = CreateAuthService(&g_authService);
    if (err != SDKERR_SUCCESS || !g_authService) {
        std::cerr << "ERROR: CreateAuthService failed: " << err << std::endl;
        return false;
    }
    std::cout << "Auth service created" << std::endl;
    
    // Set event listener
    err = g_authService->SetEvent(new MyAuthListener());
    if (err != SDKERR_SUCCESS) {
        std::cerr << "ERROR: SetEvent failed: " << err << std::endl;
        return false;
    }
    std::cout << "Event listener set" << std::endl;
    
    // Validate JWT token
    if (jwt_token.empty()) {
        std::cerr << "ERROR: JWT token is empty!" << std::endl;
        return false;
    }
    std::cout << "JWT token length: " << jwt_token.length() << " characters" << std::endl;
    
    // Create auth context
    AuthContext authContext;
    authContext.jwt_token = jwt_token.c_str();
    
    // Call SDKAuth
    err = g_authService->SDKAuth(authContext);
    if (err != SDKERR_SUCCESS) {
        std::cerr << "ERROR: SDKAuth failed: " << err << std::endl;
        return false;
    }
    
    std::cout << "SDKAuth called successfully, waiting for callback..." << std::endl;
    return true;
}

// Step 4: Wait for Authentication (WITH MESSAGE LOOP!)
bool WaitForAuthentication(int timeoutSeconds = 30) {
    std::cout << "[3/3] Waiting for authentication..." << std::endl;
    
    auto startTime = std::chrono::steady_clock::now();
    
    while (!g_authenticated && !g_exit) {
        // CRITICAL: Process Windows messages for SDK callbacks!
        MSG msg;
        while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        
        // Check timeout
        auto elapsed = std::chrono::duration_cast<std::chrono::seconds>(
            std::chrono::steady_clock::now() - startTime).count();
        
        if (elapsed >= timeoutSeconds) {
            std::cerr << "ERROR: Authentication timeout after " << timeoutSeconds << " seconds" << std::endl;
            return false;
        }
        
        // Small sleep to avoid CPU spinning
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }
    
    return g_authenticated;
}

// Main function
int main() {
    // Your JWT token here
    std::wstring jwt_token = L"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...";
    
    // Step 1: Initialize SDK
    if (!InitializeSDK()) {
        return 1;
    }
    
    // Step 2: Authenticate
    if (!AuthenticateSDK(jwt_token)) {
        return 1;
    }
    
    // Step 3: Wait for callback
    if (!WaitForAuthentication()) {
        return 1;
    }
    
    std::cout << "\n✓ Authentication complete! Ready to join meeting." << std::endl;
    
    // Now you can join meetings...
    
    // Cleanup
    if (g_authService) {
        DestroyAuthService(g_authService);
    }
    CleanUPSDK();
    
    return 0;
}

Optional: Network/Proxy Detection

If your app needs to work behind corporate proxies, register the network connection handler after InitSDK but before authentication:

#include <network_connection_handler_interface.h>

class MyNetworkHandler : public INetworkConnectionHandler {
public:
    void onProxyDetectComplete() override {
        std::cout << "[NETWORK] Proxy detection complete" << std::endl;
        // NOW safe to proceed with authentication
        g_proxyDetected = true;
    }
    
    void onProxySettingNotification(IProxySettingHandler* handler) override {
        // Handle proxy settings if needed
        std::cout << "[NETWORK] Proxy settings notification" << std::endl;
    }
    
    void onSSLCertVerifyNotification(ISSLCertVerificationHandler* handler) override {
        // Handle SSL cert verification if needed
        std::cout << "[NETWORK] SSL cert verification" << std::endl;
    }
};

bool WaitForProxyDetection() {
    // Create network helper
    INetworkConnectionHelper* networkHelper = nullptr;
    CreateNetworkConnectionHelper(&networkHelper);
    
    if (networkHelper) {
        networkHelper->RegisterNetworkConnectionHandler(new MyNetworkHandler());
        
        // Wait for onProxyDetectComplete callback
        while (!g_proxyDetected) {
            MSG msg;
            while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
            std::this_thread::sleep_for(std::chrono::milliseconds(100));
        }
        
        return true;
    }
    return false;
}

When to use: Only needed if you're behind a corporate proxy or need SSL certificate handling. Most apps can skip this step.


JWT Token Setup

Generating JWT Token
  1. Go to Zoom Marketplace: https://marketplace.zoom.us/

  2. Create/Select App: Go to "Develop" → "Build App" → "Meeting SDK"

  3. Get Credentials: Find "App Credentials" tab

    • SDK Key (Client ID)

    • SDK Secret (Client Secret)

  4. Generate JWT: Use the built-in JWT generator or create manually

JWT Token Format

Valid JWT token:

  • Length: 200-500 characters

  • Starts with: eyJ

  • Contains: Two periods (.) separating three parts

  • Example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhcHBLZXk...

Loading from Configuration File
#include <json/json.h>
#include <fstream>

bool LoadJWTFromConfig(std::wstring& jwt_token) {
    std::ifstream f("config.json");
    if (!f.is_open()) {
        std::cerr << "ERROR: config.json not found" << std::endl;
        return false;
    }
    
    Json::Value config;
    try {
        f >> config;
    } catch (const std::exception& e) {
        std::cerr << "ERROR: Failed to parse config.json: " << e.what() << std::endl;
        return false;
    }
    
    if (config["sdk_jwt"].empty()) {
        std::cerr << "ERROR: sdk_jwt not found in config.json" << std::endl;
        return false;
    }
    
    std::string jwt_str = config["sdk_jwt"].asString();
    jwt_token = std::wstring(jwt_str.begin(), jwt_str.end());
    
    return true;
}

config.json:

{
  "sdk_jwt": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "meeting_number": "1234567890",
  "passcode": "meeting_password"
}

Common Authentication Errors

AuthResult Error Codes
CodeEnumMeaningSolution
0AUTHRET_SUCCESS✓ SuccessContinue to join meeting
1AUTHRET_KEYORSECRETEMPTYSDK Key/Secret emptyCheck JWT token
3AUTHRET_JWTTOKENWRONGInvalid JWTRegenerate token
4AUTHRET_OVERTIMERequest timeoutCheck network
5AUTHRET_NETWORKISSUENetwork problemCheck firewall/internet
7AUTHRET_CLIENT_INCOMPATIBLESDK version mismatchUpdate SDK
10AUTHRET_JWTTOKENEXPIREDJWT expiredGenerate fresh token
Timeout (No Callback)

Symptom: Waiting forever, no callback received

Causes:

  1. Missing Windows message loop (most common!)

  2. Network/firewall blocking

  3. Invalid JWT format

Debug:

void onAuthenticationReturn(AuthResult ret) override {
    std::cout << "CALLBACK FIRED! Result: " << ret << std::endl;  // Does this print?
}

If you never see "CALLBACK FIRED!", you're not processing Windows messages!

Invalid JWT Token

Symptom: AUTHRET_JWTTOKENWRONG (code 3)

Causes:

  1. Token expired (typically 24-48 hours)

  2. Wrong SDK Key/Secret used to generate token

  3. Token generated for different app

  4. Malformed token

Solution:

  • Generate fresh JWT token from Zoom Marketplace

  • Verify SDK credentials match

  • Check token format (starts with "eyJ", has two dots)

Network Issues

Symptom: AUTHRET_NETWORKISSUE (code 5) or timeout

Solutions:

  • Check internet connection

  • Verify can access zoom.us from browser

  • Check Windows Firewall settings

  • If behind corporate proxy, may need proxy configuration

  • Temporarily disable antivirus to test


Best Practices

1. Validate JWT Before Using
bool ValidateJWT(const std::wstring& jwt_token) {
    // Check length
    if (jwt_token.length() < 100) {
        std::cerr << "JWT token too short: " << jwt_token.length() << std::endl;
        return false;
    }
    
    // Check starts with "eyJ"
    if (jwt_token.substr(0, 3) != L"eyJ") {
        std::cerr << "JWT token doesn't start with 'eyJ'" << std::endl;
        return false;
    }
    
    // Check has two dots (three parts)
    int dotCount = 0;
    for (wchar_t c : jwt_token) {
        if (c == L'.') dotCount++;
    }
    if (dotCount != 2) {
        std::cerr << "JWT token should have 2 dots, found: " << dotCount << std::endl;
        return false;
    }
    
    return true;
}
2. Add Timeout with Progress Updates
bool WaitForAuthenticationWithProgress(int timeoutSeconds = 30) {
    auto startTime = std::chrono::steady_clock::now();
    int lastProgressSeconds = 0;
    
    while (!g_authenticated && !g_exit) {
        // Process messages
        MSG msg;
        while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        
        // Show progress every 5 seconds
        auto elapsed = std::chrono::duration_cast<std::chrono::seconds>(
            std::chrono::steady_clock::now() - startTime).count();
        
        if (elapsed > lastProgressSeconds && elapsed % 5 == 0) {
            std::cout << "Still waiting... (" << elapsed << "s)" << std::endl;
            lastProgressSeconds = elapsed;
        }
        
        if (elapsed >= timeoutSeconds) {
            return false;
        }
        
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }
    
    return g_authenticated;
}
3. Cleanup on Failure
void Cleanup() {
    if (g_authService) {
        DestroyAuthService(g_authService);
        g_authService = nullptr;
    }
    CleanUPSDK();
}

int main() {
    if (!InitializeSDK()) {
        return 1;
    }
    
    if (!AuthenticateSDK(jwt_token)) {
        Cleanup();  // Always cleanup on failure
        return 1;
    }
    
    if (!WaitForAuthentication()) {
        Cleanup();
        return 1;
    }
    
    // ... use SDK ...
    
    Cleanup();  // Cleanup on success too
    return 0;
}

After Authentication: Join/Start Meeting

Once authenticated, create the meeting service and join:

#include <meeting_service_interface.h>

IMeetingService* g_meetingService = nullptr;
bool g_inMeeting = false;

class MyMeetingListener : public IMeetingServiceEvent {
public:
    void onMeetingStatusChanged(MeetingStatus status, int iResult) override {
        std::cout << "[MEETING] Status changed: " << status << std::endl;
        
        switch (status) {
        case MEETING_STATUS_IDLE:
            std::cout << "[MEETING] Idle" << std::endl;
            break;
        case MEETING_STATUS_CONNECTING:
            std::cout << "[MEETING] Connecting..." << std::endl;
            break;
        case MEETING_STATUS_WAITINGFORHOST:
            std::cout << "[MEETING] Waiting for host..." << std::endl;
            break;
        case MEETING_STATUS_INMEETING:
            std::cout << "[MEETING] IN MEETING - Controllers now available!" << std::endl;
            g_inMeeting = true;
            SetupControllers();  // NOW safe to get controllers
            break;
        case MEETING_STATUS_DISCONNECTING:
            std::cout << "[MEETING] Disconnecting..." << std::endl;
            break;
        case MEETING_STATUS_ENDED:
            std::cout << "[MEETING] Ended" << std::endl;
            g_inMeeting = false;
            break;
        case MEETING_STATUS_FAILED:
            std::cerr << "[MEETING] FAILED - Error: " << iResult << std::endl;
            break;
        }
    }
    
    void onMeetingStatisticsWarningNotification(StatisticsWarningType type) override {}
    void onMeetingParameterNotification(const MeetingParameter* param) override {}
    void onSuspendParticipantsActivities() override {}
    void onAICompanionActiveChangeNotice(bool active) override {}
    void onMeetingTopicChanged(const zchar_t* topic) override {}
    void onMeetingFullToWatchLiveStream(const zchar_t* url) override {}
    void onUserNetworkStatusChanged(MeetingComponentType type, ConnectionQuality quality, 
                                     unsigned int userId, bool uplink) override {}
#if defined(WIN32)
    void onAppSignalPanelUpdated(IMeetingAppSignalHandler* handler) override {}
#endif
};

bool CreateAndJoinMeeting(UINT64 meetingNumber, const wchar_t* passcode, const wchar_t* userName) {
    // Step 1: Create meeting service
    SDKError err = CreateMeetingService(&g_meetingService);
    if (err != SDKERR_SUCCESS || !g_meetingService) {
        std::cerr << "ERROR: CreateMeetingService failed: " << err << std::endl;
        return false;
    }
    
    // Step 2: Set event listener
    g_meetingService->SetEvent(new MyMeetingListener());
    
    // Step 3: Prepare join parameters
    JoinParam joinParam;
    joinParam.userType = SDK_UT_WITHOUT_LOGIN;
    
    JoinParam4WithoutLogin& param = joinParam.param.withoutloginuserJoin;
    param.meetingNumber = meetingNumber;
    param.userName = userName;
    param.psw = passcode;
    param.isVideoOff = true;   // Bot typically joins with video off
    param.isAudioOff = false;  // But audio on to hear
    
    // Step 4: Join!
    err = g_meetingService->Join(joinParam);
    if (err != SDKERR_SUCCESS) {
        std::cerr << "ERROR: Join failed: " << err << std::endl;
        return false;
    }
    
    std::cout << "Join() called, waiting for MEETING_STATUS_INMEETING..." << std::endl;
    return true;
}

// Call this ONLY after MEETING_STATUS_INMEETING
void SetupControllers() {
    // Audio
    IMeetingAudioController* audioCtrl = g_meetingService->GetMeetingAudioController();
    if (audioCtrl) {
        audioCtrl->JoinVoip();
        audioCtrl->MuteAudio(0, true);  // Mute self
    }
    
    // Video
    IMeetingVideoController* videoCtrl = g_meetingService->GetMeetingVideoController();
    // ...
    
    // Chat
    IMeetingChatController* chatCtrl = g_meetingService->GetMeetingChatController();
    // ...
}
CRITICAL: Controller Availability
WhenControllers Available?
Before MEETING_STATUS_INMEETINGNO - Returns nullptr
After MEETING_STATUS_INMEETINGYES - Safe to use
After MEETING_STATUS_ENDEDNO - Pointers invalid

Common mistake: Getting controllers before joining. ALWAYS wait for the MEETING_STATUS_INMEETING callback!


Troubleshooting Steps

Step 1: Check JWT Token
std::cout << "JWT length: " << jwt_token.length() << std::endl;
std::cout << "JWT preview: " << jwt_token.substr(0, 30) << "..." << std::endl;

Expected output:

JWT length: 358
JWT preview: eyJhbGciOiJIUzI1NiIsInR5cCI...
Step 2: Verify SDKAuth Return
SDKError err = g_authService->SDKAuth(authContext);
std::cout << "SDKAuth returned: " << err << std::endl;
  • 0 (SDKERR_SUCCESS): Good, wait for callback

  • Non-zero: Immediate error, check JWT format

Step 3: Confirm Callback Fires

Add logging in onAuthenticationReturn:

void onAuthenticationReturn(AuthResult ret) override {
    std::cout << "*** CALLBACK RECEIVED ***" << std::endl;  // First line!
    // ... rest of code ...
}

If you never see "CALLBACK RECEIVED", you need a message loop!

Step 4: Test Network
// Before SDKAuth
std::cout << "Testing network..." << std::endl;
// Try to access zoom.us or check internet connection

See Also

Requirements and compatibility

Written for: Claude Code, Claude apps

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Claude Code frontmatter, Needs a command-line tool

Security

What our scanner noticed· Low risk

  • Instructions that use the network

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Created by
Zoom
Publisher
Anthropic (Official)
Distributed by
Anthropic
Source
anthropics/knowledge-work-plugins · partner-built/zoom-plugin/skills/meeting-sdk/windows · commit e050c2e
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from partner-built/zoom-plugin/LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

AutoGineer is not affiliated with or endorsed by Zoom or Anthropic.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download zoom-meeting-sdk-windows.zip