> For a complete page index of the Captain API documentation, fetch https://docs.captain.dev/llms.txt?excludeSpec=true

# Playground

* **Full endpoint catalog**: the Playground now covers the whole API, every index provider, sync management, chunks, relations, and jobs, organized into collapsible groups with instant rail search. Each endpoint card links to its reference page.
* **Pickers instead of pasted IDs**: collection, document, sync, job, chunk, and relation fields fill from live dropdowns populated by the matching list endpoints, including dependent two-level pickers (pick a document, then one of its chunks).
* **Better responses**: syntax-highlighted raw JSON plus a collapsible tree view, with the server-reported request time on every response chip. Cmd+Enter (Ctrl+Enter on Windows) submits the current request.
* **Bring your own key**: the Playground no longer pulls an API key from the dashboard session automatically. Requests run with the key entered in the page, and a missing key is a hint on the card rather than a wall.