---
title: "Changes to Introspect a token"
method: POST
path: "/oauth2/introspect"
---

# Changes to Introspect a token

`POST /oauth2/introspect`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 24 revisions.

- **2026-10-28** `dbb5e203b445`: 4 breaking, 3 warning, 2 info
- **2026-10-21** `a90ab79f26a1`: 1 warning

## Changes

- **2026-10-28** `dbb5e203b445`: 4 breaking, 3 warning, 2 info
  - the `client_id` request property's minLength was increased from `0` to `1` (media type: application/x-www-form-urlencoded)
  - the `client_id` request property's minLength was increased from `0` to `1` (media type: application/json)
  - the `token` request property's minLength was increased from `0` to `1` (media type: application/x-www-form-urlencoded)
  - the `token` request property's minLength was increased from `0` to `1` (media type: application/json)
  - added the new `authorization_pending` enum value to the `error` response property for the response status `401`
  - added the new `expired_token` enum value to the `error` response property for the response status `401`
  - added the new `slow_down` enum value to the `error` response property for the response status `401`
  - added the non-success response with the status `400`
  - added the non-success response with the status `500`
- **2026-10-21** `a90ab79f26a1`: 1 warning
  - added the new `invalid_target` enum value to the `error` response property for the response status `401`

---

[Operation](https://skmtc.dev/pipeshub-ai/apis/pipeshub-api/docs/oauth2/introspect/post.md) - [API](https://skmtc.dev/pipeshub-ai/apis/pipeshub-api.md) - [Page](https://skmtc.dev/pipeshub-ai/apis/pipeshub-api/changes/oauth2/introspect/post)