claudeai-mcp-bridge

> Disclaimer: This project is not affiliated with, endorsed by, or officially supported by Anthropic. It is an independent, experimental project for educational and research purposes. It uses undocumented internal APIs that may change or break at any time. Using Claude subscription tokens outside official clients may violate Anthropic's Terms of Service. Use at your own risk -- no warranty is provided.

Use your claude.ai connectors (Slack, Atlassian, Gmail, Google Calendar) inside any MCP client -- zero credential setup.

This is a standard MCP server (stdio) that bridges connectors you've already authorized through claude.ai into any MCP-compatible tool. Works with OpenCode, Claude Desktop, Cursor, Cline, Windsurf, and more.

┌────────────┐  stdio (MCP)  ┌──────────────────┐   HTTPS    ┌──────────────────┐
│ Any MCP    │──────────────>│ This MCP Server  │──────────>│ mcp-proxy.       │
│ Client     │<──────────────│                  │<──────────│ anthropic.com    │
│            │  tools/list   │ Reads Keychain   │           │                  │
│ OpenCode   │  tools/call   │ Discovers servers│           │ Slack, Atlassian │
│ Claude     │               │ Proxies calls    │           │ Gmail, Calendar  │
│ Desktop    │               └──────────────────┘           └──────────────────┘
│ Cursor     │
│ ...        │
└────────────┘

1. Reads your OAuth token from macOS Keychain (written by Claude Code)
2. Discovers your connectors via api.anthropic.com/v1/mcp_servers
3. Connects to each via mcp-proxy.anthropic.com (Streamable HTTP)
4. Exposes all tools over stdio MCP protocol

• Claude Code logged in (claude --version)
• Connectors authorized at https://claude.ai/settings/connectors
• Bun runtime (bun -v)

git clone https://g