AstrBot HTTP API

Starting from v4.18.0, AstrBot provides API Key based HTTP APIs for programmatic access.

Quick Start

1. Create an API key in WebUI - Settings.
2. Include the API key in request headers:

Authorization: Bearer abk_xxx

Also supported:

X-API-Key: abk_xxx

3. For chat endpoints, username is required:

• POST /api/v1/chat: request body must include username
• GET /api/v1/chat/sessions: query params must include username

The local OpenAPI schema is available at http://localhost:6185/api/v1/openapi.json, and the interactive docs are available at http://localhost:6185/api/v1/docs.

Scope Permissions

API Keys can be configured with scopes. See the API Scope–Endpoint Reference for each scope's purpose, inheritance rules, and complete endpoint list.

If the API Key does not include the required scope for the target endpoint, the request will return 403 Insufficient API key scope.

• config is not selected by default in the WebUI and automatically includes bot and provider.
• config:edit_admin and chat:admin must be granted explicitly and are never inherited from their parent scopes.
• Deselecting bot or provider in the WebUI also removes the dependent config scope.

Developer API keys currently support 11 top-level scopes and two sensitive sub-scopes. tool, skills, kb, and system are not valid developer API key scopes. Use the singular skill scope for /api/v1/skills/* endpoints.

Every operation in the interactive reference also displays Required scope: ...; operations involving administrator capabilities additionally display Conditional sensitive scope: ....

Common Endpoints

Chat

Interact with AstrBot's built-in Agent. Supports plugin calls, tool calls, and other capabilities — consistent with IM-side chat.

• POST /api/v1/chat: send chat message (SSE stream, server generates UUID when session_id is omitted)
• GET /api/v1/chat/sessions: list sessions for a specific username with pagination
• GET /api/v1/configs: list available config files
• POST /api/v1/file: upload an attachment for later use in message segments

Bots and Providers

• GET /api/v1/bots: list bot/platform configurations
• POST /api/v1/bots: create a bot/platform configuration
• GET /api/v1/providers: list model provider configurations
• GET /api/v1/provider-sources: list provider source configurations

Personas, Plugins, MCP, and Skills

• GET /api/v1/personas: list personas
• GET /api/v1/plugins: list plugins
• GET /api/v1/mcp/servers: list MCP servers
• GET /api/v1/skills: list skills

Proactive IM Messages

• POST /api/v1/im/message: send a proactive message via UMO
• GET /api/v1/im/bots: list bot/platform IDs

message Field Format (Important)

The message field in POST /api/v1/chat and POST /api/v1/im/message supports two formats:

1. String: plain text message
2. Array: message segments (message chain)

1. Plain Text Format

{
  "message": "Hello"
}

2. Message Segment Array Format

{
  "message": [
    { "type": "plain", "text": "Please see this file" },
    { "type": "file", "attachment_id": "9a2f8c72-e7af-4c0e-b352-111111111111" }
  ]
}

Supported type values:

type	Required Fields	Optional Fields	Description
plain	text	-	Text segment
reply	message_id	selected_text	Quote-reply a message
image	attachment_id	-	Image attachment segment
record	attachment_id	-	Audio attachment segment
file	attachment_id	-	Generic file segment
video	attachment_id	-	Video attachment segment

• The reply segment is currently only supported for /api/v1/chat, not for POST /api/v1/im/message.

Notes:

• attachment_id comes from an existing attachment record, or from POST /api/v1/file after uploading an attachment with the file scope.
• reply cannot be the only segment; at least one content segment (e.g. plain/image/file/...) is required.
• A request with only reply or empty content will return an error.

message Usage in Chat API

POST /api/v1/chat additionally requires username, with optional session_id (a UUID is auto-generated if omitted).

username is a caller-declared WebChat identity used as the message sender and session owner. A key with only chat is rejected when the value matches any configured administrator ID and is prevented from receiving an administrator role inside the message pipeline. The sensitive chat:admin sub-scope explicitly permits configured administrator IDs; it does not make arbitrary usernames administrators. Integrations should still map external users to stable, application-controlled usernames.

{
  "username": "alice",
  "session_id": "my_session_001",
  "message": [
    { "type": "plain", "text": "Please summarize this PDF" },
    { "type": "file", "attachment_id": "9a2f8c72-e7af-4c0e-b352-111111111111" }
  ],
  "enable_streaming": true
}

message Usage in IM Message API

POST /api/v1/im/message requires umo + message.

{
  "umo": "webchat:FriendMessage:openapi_probe",
  "message": [
    { "type": "plain", "text": "This is a proactive message" },
    { "type": "image", "attachment_id": "9a2f8c72-e7af-4c0e-b352-222222222222" }
  ]
}

Example

curl -N 'http://localhost:6185/api/v1/chat' \
  -H 'Authorization: Bearer abk_xxx' \
  -H 'Content-Type: application/json' \
  -d '{"message":"Hello","username":"alice"}'

Full API Reference

Use the interactive docs:

• https://docs.astrbot.app/scalar.html