All clients

Maxwell in Codex CLI

Server address

https://maxwell-f20170061g-api.vercel.app/mcp

With an API key

Replace <your API key> with a key from your account. It goes in a header: never put it in the address.

Add this to your Codex config, restart Codex. Older versions need experimental_use_rmcp_client = true at the top of the file.

~/.codex/config.toml

[mcp_servers.maxwell]
url = "https://maxwell-f20170061g-api.vercel.app/mcp"
http_headers = { "Authorization" = "Bearer <your API key>" }

Checked against the client's documented MCP settings; if your version differs, follow its own docs with the address above.