# idempotent on POST /v1/sessions is deprecated

Devin deprecated POST /v1/sessions, body parameter idempotent without giving a shutdown date yet.

- API: Devin (api.devin.ai)
- Kind: Endpoint removal
- Announced: September 11, 2026
- Takes effect: no date given yet
- Calls after that day: fail
- Calls it hits: `POST /v1/sessions`, `body parameter idempotent`
- Source: [Announcement](https://docs.devin.ai/release-notes/overview)
- Page: https://www.okapi.bot/providers/devin/breaking-changes/idempotent-on-post-v1-sessions-is-deprecated/

## What to use instead

Send idempotency_key instead.