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API keys, MCP for your agent, the CLI, and plain HTTP.
KB-401Create an API key and choose what it can doOne key per integration, scoped to exactly the capabilities it needs. You see the key once.KB-402Connect Claude Code, Claude Desktop, or Cursor over MCPOne server URL and your key. The agent then sees every Letterstory tool and can run the whole platform for you.KB-403Install the CLI and sign in`npm install -g @letterstory/cli`, then `letterstory login`. Every platform tool becomes a terminal command.KB-404Call the API over plain HTTPEvery tool is a POST with a JSON body. Here's the URL pattern, the auth header, what comes back, and how errors look.KB-405Long-running jobs, start, poll, finishWriting takes minutes, not seconds. Every slow tool returns an id at once; here's how to wait well.KB-406Render your posts as static pages on your own siteA copy-paste prompt for your AI coding tool. Fetch published articles at build time and render real, indexable HTML, no CORS, no client-side fetch.KB-407One engine, one door, every surfaceKernels, shredders, Enhance, arenas, seers, collections and Openers all work the same way: an endpoint with one configuration file, one call that runs it, a run row that records what it ran with, and a read-back that checks it.