---
title: "Changes to Redact text and explain the redactions."
method: POST
path: "/api/explain"
---

# Changes to Redact text and explain the redactions.

`POST /api/explain`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 8 of 116 revisions.

- **2026-10-17** `fddc8a37e181`: 4 info
- **2026-10-10** `c4f85daa9208`: 18 info
- **2026-10-05** `4082c17721d8`: 9 breaking, 9 info
- **2026-09-12** `00377bbbb5be`: 1 info
- **2026-09-07** `a3bc5909807a`: 1 breaking, 8 info
- **2026-09-05** `2808259c496e`: 1 info
- **2026-08-04** `ee79a60eea42`: 1 info
- **2026-08-03** `e46672d44401`: 1 info

## Changes

- **2026-10-17** `fddc8a37e181`: 4 info
  - added the optional property `explanation/appliedSpans` to the response with the `200` status
  - added the optional property `explanation/identifiedSpans` to the response with the `200` status
  - added the optional property `piece` to the response with the `200` status
  - added the optional property `tokens` to the response with the `200` status
- **2026-10-10** `c4f85daa9208`: 18 info
  - added the optional property `field` to the response with the `400` status
  - added the optional property `field` to the response with the `401` status
  - added the optional property `field` to the response with the `404` status
  - added the optional property `field` to the response with the `405` status
  - added the optional property `field` to the response with the `406` status
  - added the optional property `field` to the response with the `413` status
  - added the optional property `field` to the response with the `415` status
  - added the optional property `field` to the response with the `500` status
  - added the optional property `field` to the response with the `503` status
  - added the optional property `reason` to the response with the `400` status
  - added the optional property `reason` to the response with the `401` status
  - added the optional property `reason` to the response with the `404` status
  - added the optional property `reason` to the response with the `405` status
  - added the optional property `reason` to the response with the `406` status
  - added the optional property `reason` to the response with the `413` status
  - added the optional property `reason` to the response with the `415` status
  - added the optional property `reason` to the response with the `500` status
  - added the optional property `reason` to the response with the `503` status
- **2026-10-05** `4082c17721d8`: 9 breaking, 9 info
  - removed the media type `*/*` for the response with the status `400`
  - removed the media type `*/*` for the response with the status `401`
  - removed the media type `*/*` for the response with the status `404`
  - removed the media type `*/*` for the response with the status `405`
  - removed the media type `*/*` for the response with the status `406`
  - removed the media type `*/*` for the response with the status `413`
  - removed the media type `*/*` for the response with the status `415`
  - removed the media type `*/*` for the response with the status `500`
  - removed the media type `*/*` for the response with the status `503`
  - added the media type `application/json` for the response with the status `400`
  - added the media type `application/json` for the response with the status `401`
  - added the media type `application/json` for the response with the status `404`
  - added the media type `application/json` for the response with the status `405`
  - added the media type `application/json` for the response with the status `406`
  - added the media type `application/json` for the response with the status `413`
  - added the media type `application/json` for the response with the status `415`
  - added the media type `application/json` for the response with the status `500`
  - added the media type `application/json` for the response with the status `503`
- **2026-09-12** `00377bbbb5be`: 1 info
  - added the new optional `query` request parameter `sign`
- **2026-09-07** `a3bc5909807a`: 1 breaking, 8 info
  - the response's body type changed from `string` to `object` for status `200`
  - added the non-success response with the status `403`
  - added the non-success response with the status `406`
  - added the optional property `context` to the response with the `200` status
  - added the optional property `explanation` to the response with the `200` status
  - added the optional property `filteredText` to the response with the `200` status
  - added the optional property `policyContentHash` to the response with the `200` status
  - added the optional property `policyName` to the response with the `200` status
  - added the optional property `policyVersion` to the response with the `200` status
- **2026-09-05** `2808259c496e`: 1 info
  - added the non-success response with the status `404`
- **2026-08-04** `ee79a60eea42`: 1 info
  - added the non-success response with the status `415`
- **2026-08-03** `e46672d44401`: 1 info
  - added the non-success response with the status `413`

---

[Operation](https://skmtc.dev/philterd/apis/philter-api/docs/api/explain/post.md) - [API](https://skmtc.dev/philterd/apis/philter-api.md) - [Page](https://skmtc.dev/philterd/apis/philter-api/changes/api/explain/post)