Claude Code

Claude Code is Anthropic's terminal-based AI coding assistant. Part3 ships a first-class MCP integration.

One-liner

claude mcp add --transport http part3 https://mcp.part3.io

No header, no secret. On first use Claude Code opens a browser to the Part3 sign-in page, then to a consent screen where you approve the requested access. After that, tokens refresh automatically.

By default this adds the server at local scope (this project only, private to you). To make Part3 available across all your projects, add --scope user:

claude mcp add --transport http --scope user part3 https://mcp.part3.io

Settings file (alternative)

If you'd rather edit a config file, MCP servers live in ~/.claude.json (local or user scope) or in a .mcp.json file at your project root (project scope, checked into version control). For a project-scoped server, create or edit .mcp.json:

{
  "mcpServers": {
    "part3": {
      "type": "http",
      "url": "https://mcp.part3.io"
    }
  }
}

No headers field — Claude Code discovers the OAuth endpoints automatically. ("type": "http" is the remote streamable-HTTP transport; "streamable-http" is accepted as an alias.)

Authenticate

If a session shows part3 as needing authentication, run /mcp inside Claude Code and follow the browser login flow. From the command line you can instead run:

claude mcp login part3

Over SSH, add --no-browser to print the authorization URL instead of opening a browser.

Verify

Run claude mcp list — part3 should show as connected. Inside a Claude Code session, /mcp lists part3 with its tool count. Then ask a question:

List my three most recent projects.

If Claude responds with a project list, you're wired up.

Troubleshooting