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Give Claude Code access to the Arcus docs so it can answer questions and generate code grounded in the live REST and WebSocket reference.

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Prerequisites

  • Claude Code installed (npm i -g @anthropic-ai/claude-code)
  • An Anthropic account (Claude Pro, Max, Team, or API access)

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Setup

1

Add the MCP server

In your terminal, run:
Optional scope:
  • -s user — available across every project on this machine
  • -s project — saved to .mcp.json in the repo (shared with teammates)
  • default (no flag) — only this project, only you
2

Authenticate

Start a Claude Code session and run:
Select arcus-docs, then Authenticate. A browser window opens, you sign in, and the OAuth token is stored locally. You only do this once.
3

Verify the connection

You should see arcus-docs ✓ Connected. Inside a session, /mcp will also show the tools the server exposes (search, fetch, etc.).
4

Try it

Ask something that exercises the spec:
Which endpoint accepts take-profit and stop-loss parameters — placeOrder or batchPlaceOrders? Show me the request shape.
Claude Code will call the MCP server, pull the relevant page, and answer from the actual spec instead of guessing.

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Removing the server

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Notes

  • The first request after authentication may take a moment while the client establishes the streaming HTTP session.
  • If the Authenticate step never opens a browser, update Claude Code and re-add the server — HTTP-transport OAuth support is recent.
  • For the underlying server details and OAuth metadata, see the MCP server overview.