---
title: "Changes to Challenge a parked inbound REGISTER with a 401 digest auth request"
method: POST
path: "/sip/registrations/attempts/{id}/challenge"
---

# Changes to Challenge a parked inbound REGISTER with a 401 digest auth request

`POST /sip/registrations/attempts/{id}/challenge`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 83 revisions.

- **2026-09-25** `b0c3ad7abb3d`: 1 info
- **2026-07-08** `dd81a8d77dba`: 1 info
- **2026-07-04** `8e2966a803c8`: 1 info

## Changes

- **2026-09-25** `b0c3ad7abb3d`: 1 info
  - added the new optional request property `app_id`
- **2026-07-08** `dd81a8d77dba`: 1 info
  - added the new optional request property `max_expires`
- **2026-07-04** `8e2966a803c8`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/voiceblender/apis/voiceblender-api/docs/sip/registrations/attempts/:id/challenge/post.md) - [API](https://skmtc.dev/voiceblender/apis/voiceblender-api.md) - [Page](https://skmtc.dev/voiceblender/apis/voiceblender-api/changes/sip/registrations/attempts/:id/challenge/post)