BASETEN_API_KEY.
Most routes use /v1/loops and run in your organization’s default team. Routes under /v1/teams/{team_id}/loops provision or list resources in a specified team. The Loops Python SDK calls these routes when you pass a team_id.
Pass your key in the Authorization: Bearer $BASETEN_API_KEY header. Each endpoint page documents its request body, query parameters, response shape, and interactive playground.
Resource model
A session owns runs and samplers. A run owns checkpoints, and checkpoints produce deployments. Both the HTTP API and the Python SDK identify a trainer by itsrun_id.