# LangBot

> LangBot is an open-source AI application delivery infrastructure for instant messaging platforms. It connects AI applications and agents built with Dify, Coze, n8n, OpenAI-compatible models, Claude, DeepSeek, Gemini, Qwen, Ollama, and custom tools to Discord, Slack, Telegram, WeChat, WeCom, QQ, Lark, DingTalk, LINE, KOOK, and more.

## Primary links

- Website: https://langbot.app
- Agent and developer guide: https://langbot.app/developers
- Full agent context: https://langbot.app/llms-full.txt
- OpenAPI description: https://langbot.app/openapi.json
- Documentation: https://docs.langbot.app
- GitHub repository: https://github.com/langbot-app/LangBot
- Plugin SDK: https://github.com/langbot-app/langbot-plugin-sdk
- Plugin marketplace: https://space.langbot.app/market
- Managed cloud instances: https://space.langbot.app/cloud
- Blog: https://blog.langbot.app

## What agents can do with LangBot

- Deploy or guide deployment of self-hosted LangBot with Docker.
- Create managed LangBot Cloud instances for users who do not want to operate servers.
- Connect AI apps, agents, and workflows to real messaging channels.
- Build custom plugins with the Python plugin SDK.
- Inspect integration surfaces, auth methods, rate-limit expectations, streaming support, and error response formats in the developer guide.

## Integration surfaces

- Self-hosted LangBot admin/API surface: controlled by the operator's deployment and configuration.
- LangBot Space / Cloud API: account, OAuth/device authorization, cloud instance, marketplace, billing, and telemetry surfaces hosted at https://space.langbot.app.
- Plugin runtime API: process-isolated Python SDK for extending LangBot behavior.

## Authentication summary

- Browser users authenticate through LangBot Space account login.
- Devices and LangBot instances can use OAuth/device authorization flows.
- API access uses bearer tokens or API keys where enabled.
- Self-hosted deployments may configure their own access controls.

## Rate limits and streaming summary

- Self-hosted LangBot has no global public SaaS rate limit by default; operators define limits through their deployment, model providers, and plugin configuration.
- LangBot Cloud applies fair-use and plan-based limits for managed resources.
- Model/provider calls may stream responses when the configured provider and runner support streaming; integrations should tolerate non-streaming responses and provider-specific errors.

## Support

- Support email: hello@langbot.app
- GitHub Discussions: https://github.com/langbot-app/LangBot/discussions
- Issues: https://github.com/langbot-app/LangBot/issues

## Agent discovery endpoints

- Markdown homepage: https://langbot.app/index.md
- Section-specific developer context: https://langbot.app/developers/llms.txt
- A2A agent card: https://langbot.app/.well-known/agent-card.json
- MCP discovery: https://langbot.app/.well-known/mcp
- MCP server card: https://langbot.app/.well-known/mcp/server-card.json
- API catalog: https://langbot.app/.well-known/api-catalog
- OpenAI plugin manifest: https://langbot.app/.well-known/ai-plugin.json
- OAuth authorization server metadata: https://langbot.app/.well-known/oauth-authorization-server
- Web Bot Auth HTTP message signatures directory: https://langbot.app/.well-known/http-message-signatures-directory
- NLWeb schema map: https://langbot.app/schema-map.xml