---
title: "Changes to POST /api/v1/auth/token"
method: POST
path: "/api/v1/auth/token"
---

# Changes to POST /api/v1/auth/token

`POST /api/v1/auth/token`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 4 revisions.

- **2026-11-03** `2895a8ddb406`: 1 breaking, 3 info
- **2026-10-07** `de905af4d5ea`: 1 breaking, 1 info

## Changes

- **2026-11-03** `2895a8ddb406`: 1 breaking, 3 info
  - the `grant_type` request property const value changed from `capability_token` to `token_exchange`
  - added the new optional request property `oneOf[subschema #1]/prefix_mask`
  - the request property `oneOf[subschema #1]/capability_mask` became nullable
  - the request property `oneOf[subschema #1]/capability_mask` became optional
- **2026-10-07** `de905af4d5ea`: 1 breaking, 1 info
  - removed `subschema #1` from the request body `oneOf` list
  - added `subschema #1, subschema #2` to the request body `oneOf` list

---

[Operation](https://skmtc.dev/estuary/apis/flow-control-plane-v1-api/docs/api/v1/auth/token/post.md) - [API](https://skmtc.dev/estuary/apis/flow-control-plane-v1-api.md) - [Page](https://skmtc.dev/estuary/apis/flow-control-plane-v1-api/changes/api/v1/auth/token/post)