# Handler

> Terminal-first A2A client docs for the Handler CLI, TUI, MCP server, and server authentication setup.

## Docs

- [Authentication](https://handler.alduncanson.com/guides/authentication.md): Configure bearer, API key, mTLS, and OAuth2 client credentials authentication for Handler servers.
- [Local servers](https://handler.alduncanson.com/guides/local-servers.md): Run Handler's bundled A2A reference agent and local webhook server for development, demos, and integration testing.
- [MCP server](https://handler.alduncanson.com/guides/mcp.md): Expose Handler's A2A capabilities through a local MCP server for Claude Desktop, Cursor, and other MCP-compatible clients.
- [Messages, tasks, and sessions](https://handler.alduncanson.com/guides/messages-tasks.md): Send messages, stream responses, manage tasks, and reuse saved conversation state from the Handler CLI.
- [Servers](https://handler.alduncanson.com/guides/servers.md): Configure reusable global or repository-local server definitions for Handler.
- [TUI and web UI](https://handler.alduncanson.com/guides/tui.md): Use Handler's interactive terminal interface to connect to agents, manage auth, inspect cards, and keep conversations moving.
- [Introduction](https://handler.alduncanson.com/index.md): Install Handler and use the TUI, CLI, or MCP server to work with A2A agents from your terminal.
- [Quickstart](https://handler.alduncanson.com/quickstart.md): Get Handler running locally, send your first message, and save a reusable server definition.

## Optional

- [GitHub](https://github.com/alDuncanson/handler)
- [A2A Protocol](https://a2a-protocol.org/latest/)