You're building fast with Claude Code, Cursor, or another coding agent and don't want to hand-write a waitlist backend to ship a landing page.
Most waitlist tools have no API your agent can act on — you end up copy-pasting a REST reference into a prompt, or building the signups table and email pipeline by hand.
An MCP server your agent can call directly: create the waitlist and wire the route handler in one prompt, with the API key configured once on the connection, never passed as a tool argument.
A real API key, the MCP server, and signup emails — no credit card.