---
title: "Changes to OAuth2 provider callback endpoint (form_post)"
method: POST
path: "/signin/provider/{provider}/callback"
---

# Changes to OAuth2 provider callback endpoint (form_post)

`POST /signin/provider/{provider}/callback`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 20 revisions.

- **2026-06-24** `0fc5fd589dbf`: 1 warning
- **2026-04-20** `b39086c84b43`: 1 warning, 1 info
- **2025-11-11** `484d9f1a422a`: 1 warning
- **2025-10-28** `ca6d11a13264`: 1 info
- **2025-10-10** `2bb5c4e40463`: 1 warning, 4 info

## Changes

- **2026-06-24** `0fc5fd589dbf`: 1 warning
  - added the new `otp-too-many-attempts` enum value to the `error` response property for the response status `default`
- **2026-04-20** `b39086c84b43`: 1 warning, 1 info
  - added the new `user-already-exists` enum value to the `error` response property for the response status `default`
  - removed the `email-already-in-use` enum value from the `error` response property for the response status `default`
- **2025-11-11** `484d9f1a422a`: 1 warning
  - added the new `provider-account-already-linked` enum value to the `error` response property for the response status `default`
- **2025-10-28** `ca6d11a13264`: 1 info
  - `path` request parameter `provider` was reactivated
- **2025-10-10** `2bb5c4e40463`: 1 warning, 4 info
  - added the new `email-already-in-use` enum value to the `error` response property for the response status `default`
  - `path` request parameter `provider` was deprecated
  - removed the `otp-too-many-attempts` enum value from the `error` response property for the response status `default`
  - removed the `provider-account-already-linked` enum value from the `error` response property for the response status `default`
  - removed the `user-already-exists` enum value from the `error` response property for the response status `default`

---

[Operation](https://skmtc.dev/nhost/apis/nhost-authentication-api/docs/signin/provider/:provider/callback/post.md) - [API](https://skmtc.dev/nhost/apis/nhost-authentication-api.md) - [Page](https://skmtc.dev/nhost/apis/nhost-authentication-api/changes/signin/provider/:provider/callback/post)