Atlas Agent Engine API Gateway (External)

1.0

User-facing REST API for MongoDB Atlas Agent Engine.

API contract negotiation

Stability: preview.

Send Accept: application/vnd.agent-engine-2026-09-20-preview+json to pin the API contract. Omission, application/json, or / selects the latest published contract (currently 2026-09-20-preview). Breaking API changes require a new date and preservation of the earlier contract. Malformed or unsupported versions return 406. Errors before contract selection can retain application/json. For streams, send Accept: text/event-stream, application/vnd.agent-engine-2026-09-20-preview+json; successful responses remain SSE. Explicitly excluding SSE returns 406 even with a positive dated selector. Operations without dated response types retain their native protocols; scoped exceptions document compatibility requirements.

This is version 1.0 of this API documentation. Last update on Oct 5, 2026.