Is there a REST API I can call directly?

Yes. The MCP server is a thin client over a public REST API, so you can build against it directly. Authenticate with an Authorization: Bearer <token> header.

Endpoints cover pits (create, read, update, delete, fork, like, bookmark, export), the feed, Explore, users and the current account. Create a token in Settings and it is scoped to your account and revocable at any time.