> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stmlink.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> 对外开放的服务端接口有两组前缀，都用同一套鉴权：`/server/v1/...`（SRTC 与 SMeeting 的主接口）和 `/stm/srvapi/v1/...`（SMeeting 的用户体系，服务端极简对接会用到）。鉴权是 app_id + nonce + timestamp + signature 四个请求头，用 app_key 做 HMAC-SHA256 签名，只能从业务方自己的后端调用。除这两组前缀外的接口均为内部接口，不要建议客户调用。 Public server APIs use two path prefixes with the same authentication: `/server/v1/...` (the main APIs of both SRTC and SMeeting) and `/stm/srvapi/v1/...` (the SMeeting user system, used by server-side low-code integration). Authenticate with four request headers, app_id + nonce + timestamp + signature, where signature is HMAC-SHA256 keyed with app_key; call these APIs only from the customer's own backend. Any other path is internal: never suggest calling it.
> app_key 是服务端密钥，绝不能出现在客户端代码、前端配置或移动 App 里。客户端加入频道用的 token 必须由业务方后端签发后下发（SRTC 走 `/server/v1/channel/grant`，SMeeting 走 `/stm/srvapi/v1/member/grant`）。 app_key is a server-side secret and must never appear in client code, frontend config, or a mobile app. The token a client uses to join must be issued by the customer's backend and passed down to the client (SRTC: `/server/v1/channel/grant`; SMeeting: `/stm/srvapi/v1/member/grant`).
> SRTC 与 SMeeting 是上下两层不同的产品，术语不通用：SRTC 是音视频底座，说「频道 channel」「加入 / 退出」；SMeeting 建在 SRTC 之上，说「房间 room」「会议 meeting」「进入 / 退出」。回答时按用户所在的层用对应术语，不要把「房间」「会议」安到 SRTC 的接口上，也不要用「频道」「加入 / 离开」描述 SMeeting 的概念（接口标识符原样保留）。 SRTC and SMeeting are two separate layers with different terminology. SRTC is the audio/video foundation: it has channels, and users join and leave a channel. SMeeting is built on top of SRTC: it has rooms and meetings, and members enter and exit a meeting. Answer in the terms of the layer the user is working with: never apply "room" or "meeting" to SRTC APIs, and never describe SMeeting concepts in prose with "channel", "join", or "leave" (API identifiers such as `force_join` keep their literal names).
> 同一能力在各端 SDK 里的包名、类名、方法名并不相同。写示例代码时请使用文档中该端自己的 API，不要把一个端的写法套到另一个端上。苹果平台每个产品都有两套 SDK（Swift 原生与 Objective-C），两套 API 不能混用。 Package, class, and method names differ between platform SDKs for the same capability. In sample code, use the API documented for that platform; never carry one platform's code over to another. On Apple platforms each product ships two SDKs (native Swift and Objective-C) whose APIs must not be mixed.

# Error codes

> StatusCode error values of the SMeeting Windows SDK: common codes (100xxx), Windows SDK codes (101xxx, devices, channel and stream join), and meeting-layer codes (201xxx). Read this when a call or callback returns a non-OK StatusCode.

| **Enum name** | **Value** | **Description** |
| - | :-: | - |
| OK | 0 | No error |
| **Common error codes** | | |
| SystemError | 100001 | Internal system error |
| NotInitialized | 100002 | Not initialized |
| MediaNotInitialized | 100003 | The media module isn't initialized yet |
| ProtocolParsingError | 100004 | Protocol parsing error |
| Timeout | 100005 | Timed out |
| InvalidArgs | 100006 | Invalid arguments |
| Conflict | 100007 | Conflict from a repeated operation |
| SdkTokenInvalid | 100008 | The SDK token is invalid |
| NetError | 100009 | Network error |
| MediaNetError | 100010 | Media network error |
| NotFound | 100011 | Not found |
| **Windows error codes** | | |
| SDKFail | 101000 | Internal SDK error |
| DeviceFail | 101001 | Device error |
| DeviceNoFind | 101002 | Device not found |
| UserNotFound | 101003 | The user wasn't found |
| NotDevPrivate | 101004 | No permission to access the device |
| InvalidOperation | 101005 | Invalid operation |
| NotSupport | 101006 | Not yet supported by the SDK |
| DealBeQuick | 101007 | Operation performed too quickly |
| MoudelNotSupport | 101008 | Not supported by the current media streaming mode |
| BeforeSetting | 101009 | Must be set before entering the meeting |
| ChannelJoinError | 101100 | Error joining the channel |
| ChannelJoinTimeOut | 101101 | Joining the channel timed out |
| StreamJoinError | 101200 | Error joining the media stream |
| StreamJoinConflict | 101201 | Duplicate media stream join |
| VideoCapturerError | 101202 | Camera error |
| NotFindStreamTrack | 101203 | The specified stream ID doesn't exist |
| ExceedingSpecifiedQuantity | 101204 | Exceeds the allowed quantity |
| **Windows error codes (SMEET)** | | |
| SDKMeetingFail | 201000 | Internal SDK error |
| MeetingStatusReject | 201001 | Rejected by room permissions |
| MeetingHostFail | 201002 | Host error or no host set |