---
title: "Changes to Initiate a callback between two numbers"
method: POST
path: "/callback"
---

# Changes to Initiate a callback between two numbers

`POST /callback`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 11 revisions.

- **2026-08-10** `dac34ebedef3`: 2 breaking, 3 info
- **2025-11-20** `d92d55716cc3`: 1 breaking, 1 info

## Changes

- **2026-08-10** `dac34ebedef3`: 2 breaking, 3 info
  - the request property `device` became required
  - the request property `to_number` became required
  - the `clir` request property default value `false` was added
  - the `timeout` request property default value `20` was added
  - the `timeout` request property's min was decreased from `20.00` to `10.00`
- **2025-11-20** `d92d55716cc3`: 1 breaking, 1 info
  - the request property `from_number` became not nullable
  - api operation id `postCallback` was added

---

[Operation](https://skmtc.dev/ringover/apis/ringover-public-api/docs/callback/post.md) - [API](https://skmtc.dev/ringover/apis/ringover-public-api.md) - [Page](https://skmtc.dev/ringover/apis/ringover-public-api/changes/callback/post)