WeChat

简体中文

OpenClaw's WeChat channel plugin, supporting login authorization via QR code scanning.

Compatibility

Plugin Version	OpenClaw Version	npm dist-tag	Status
2.0.x	>=2026.3.22	latest	Active
1.0.x	>=2026.1.0 <2026.3.22	legacy	Maintenance

The plugin checks the host version at startup and will refuse to load if the running OpenClaw version is outside the supported range.

Prerequisites

OpenClaw must be installed (the openclaw CLI needs to be available).

Check your version: openclaw --version

Quick Install

npx -y @tencent-weixin/openclaw-weixin-cli install

Manual Installation

If the quick install doesn't work, follow these steps manually:

1. Install the plugin

openclaw plugins install "@tencent-weixin/openclaw-weixin"

2. Enable the plugin

openclaw config set plugins.entries.openclaw-weixin.enabled true

3. QR code login

openclaw channels login --channel openclaw-weixin

A QR code will appear in the terminal. Scan it with your phone and confirm the authorization. Once confirmed, the login credentials will be saved locally automatically — no further action is needed.

4. Restart the gateway

openclaw gateway restart

Adding More WeChat Accounts

openclaw channels login --channel openclaw-weixin

Each QR code login creates a new account entry, supporting multiple WeChat accounts online simultaneously.

Multi-Account Context Isolation

By default, DMs can share one session bucket. For multiple logged-in WeChat accounts, isolate by account + channel + sender:

openclaw config set session.dmScope per-account-channel-peer

Custom BotAgent (optional)

Every outbound request to the WeChat backend carries a self-declared bot_agent identifier — analogous to an HTTP User-Agent — used for log attribution and monitoring aggregation. The default is OpenClaw. Declaring your own app name makes it much easier to trace your traffic in backend logs.

Add one line to openclaw.json:

{
  "channels": {
    "openclaw-weixin": {
      "botAgent": "MyBot/1.2.0"
    }
  }
}

Format (UA-style):

• One or more Name/Version tokens, space-separated
• Each token may optionally be followed by (comment)
• ASCII only; total length ≤ 256 bytes
• Invalid tokens are silently dropped during sanitization; falls back to OpenClaw if nothing valid remains

Examples that pass through unchanged:

• MyBot/1.2.0
• MyBot/1.2.0 (region=cn;env=prod)
• MyBot/1.2.0 LangChain/0.3.5
• MyBot/1.2.0-rc.1+build.5

Note: bot_agent is for observability only — it is not used for authentication or routing. All registered agents on this plugin instance currently share the same botAgent declaration; per-agent overrides may be added in a future version if needed.

Backend API Protocol

This plugin communicates with the backend gateway via HTTP JSON API. Developers integrating with their own backend need to implement the following interfaces.

All endpoints use POST with JSON request and response bodies. Common request headers:

Header	Description
Content-Type	application/json
AuthorizationType	Fixed value ilink_bot_token
Authorization	Bearer <token> (obtained after login)
X-WECHAT-UIN	Base64-encoded random uint32

Endpoint List

Endpoint	Path	Description
getUpdates	getupdates	Long-poll for new messages
sendMessage	sendmessage	Send a message (text/image/video/file)
getUploadUrl	getuploadurl	Get CDN upload pre-signed URL
getConfig	getconfig	Get account config (typing ticket, etc.)
sendTyping	sendtyping	Send/cancel typing status indicator

getUpdates

Long-polling endpoint. The server responds when new messages arrive or on timeout.

Request body:

{
  "get_updates_buf": ""
}

Field	Type	Description
get_updates_buf	string	Sync cursor from the previous response; empty string for the first request

Response body:

{
  "ret": 0,
  "msgs": [...],
  "get_updates_buf": "<new cursor>",
  "longpolling_timeout_ms": 35000
}

Field	Type	Description
ret	number	Return code, 0 = success
errcode	number?	Error code (e.g., -14 = session timeout)
errmsg	string?	Error description
msgs	WeixinMessage[]	Message list (structure below)
get_updates_buf	string	New sync cursor to pass in the next request
longpolling_timeout_ms	number?	Server-suggested long-poll timeout for the next request (ms)

sendMessage

Send a message to a user.

Request body:

{
  "msg": {
    "to_user_id": "<target user ID>",
    "context_token": "<conversation context token>",
    "item_list": [
      {
        "type": 1,
        "text_item": { "text": "Hello" }
      }
    ]
  }
}

getUploadUrl

Get CDN upload pre-signed parameters. Call this endpoint before uploading a file to obtain upload_param and thumb_upload_param.

Request body:

{
  "filekey": "<file identifier>",
  "media_type": 1,
  "to_user_id": "<target user ID>",
  "rawsize": 12345,
  "rawfilemd5": "<plaintext MD5>",
  "filesize": 12352,
  "thumb_rawsize": 1024,
  "thumb_rawfilemd5": "<thumbnail plaintext MD5>",
  "thumb_filesize": 1040
}

Field	Type	Description
media_type	number	1 = IMAGE, 2 = VIDEO, 3 = FILE
rawsize	number	Original file plaintext size
rawfilemd5	string	Original file plaintext MD5
filesize	number	Ciphertext size after AES-128-ECB encryption
thumb_rawsize	number?	Thumbnail plaintext size (required for IMAGE/VIDEO)
thumb_rawfilemd5	string?	Thumbnail plaintext MD5 (required for IMAGE/VIDEO)
thumb_filesize	number?	Thumbnail ciphertext size (required for IMAGE/VIDEO)

Response body:

{
  "upload_param": "<original image upload encrypted parameters>",
  "thumb_upload_param": "<thumbnail upload encrypted parameters>"
}

getConfig

Get account configuration, including the typing ticket.

Request body:

{
  "ilink_user_id": "<user ID>",
  "context_token": "<optional, conversation context token>"
}

Response body:

{
  "ret": 0,
  "typing_ticket": "<base64-encoded typing ticket>"
}

sendTyping

Send or cancel the typing status indicator.

Request body:

{
  "ilink_user_id": "<user ID>",
  "typing_ticket": "<obtained from getConfig>",
  "status": 1
}

Field	Type	Description
status	number	1 = typing, 2 = cancel typing

Message Structure

WeixinMessage

Field	Type	Description
seq	number?	Message sequence number
message_id	number?	Unique message ID
from_user_id	string?	Sender ID
to_user_id	string?	Receiver ID
create_time_ms	number?	Creation timestamp (ms)
session_id	string?	Session ID
message_type	number?	1 = USER, 2 = BOT
message_state	number?	0 = NEW, 1 = GENERATING, 2 = FINISH
item_list	MessageItem[]?	Message content list
context_token	string?	Conversation context token, must be passed back when replying

MessageItem

Field	Type	Description
type	number	1 TEXT, 2 IMAGE, 3 VOICE, 4 FILE, 5 VIDEO
text_item	{ text: string }?	Text content
image_item	ImageItem?	Image (with CDN reference and AES key)
voice_item	VoiceItem?	Voice (SILK encoded)
file_item	FileItem?	File attachment
video_item	VideoItem?	Video
ref_msg	RefMessage?	Referenced message

CDN Media Reference (CDNMedia)

All media types (image/voice/file/video) are transferred via CDN using AES-128-ECB encryption:

Field	Type	Description
encrypt_query_param	string?	Encrypted parameters for CDN download/upload
aes_key	string?	Base64-encoded AES-128 key

CDN Upload Flow

1. Calculate the file's plaintext size, MD5, and ciphertext size after AES-128-ECB encryption
2. If a thumbnail is needed (image/video), calculate the thumbnail's plaintext and ciphertext parameters as well
3. Call getUploadUrl to get upload_param (and thumb_upload_param)
4. Encrypt the file content with AES-128-ECB and PUT upload to the CDN URL
5. Encrypt and upload the thumbnail in the same way
6. Use the returned encrypt_query_param to construct a CDNMedia reference, include it in the MessageItem, and send

For complete type definitions, see src/api/types.ts. For API call implementations, see src/api/api.ts.

Uninstall

openclaw plugins uninstall @tencent-weixin/openclaw-weixin

Troubleshooting

"requires OpenClaw >=2026.3.22" error

Your OpenClaw version is too old for this plugin version. Check with:

openclaw --version

Install the legacy plugin line instead:

openclaw plugins install @tencent-weixin/openclaw-weixin@legacy

Channel shows "OK" but doesn't connect

Ensure plugins.entries.openclaw-weixin.enabled is true in ~/.openclaw/openclaw.json:

openclaw config set plugins.entries.openclaw-weixin.enabled true
openclaw gateway restart