---
title: "Changes to PATCH /v1/contactBooks/{contactBookId}"
method: PATCH
path: "/v1/contactBooks/{contactBookId}"
---

# Changes to PATCH /v1/contactBooks/{contactBookId}

`PATCH /v1/contactBooks/{contactBookId}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 4 of 27 revisions.

- **2026-07-17** `ee7832fe66a6`: 3 info
- **2026-02-28** `1bc45cd7b94e`: 8 info
- **2026-01-17** `da09bf6f14b1`: 1 info
- **2024-05-21** `ad91eadfd8ee`: 1 breaking

## Changes

- **2026-07-17** `ee7832fe66a6`: 3 info
  - added the new optional request property `variables`
  - added the optional property `_count` to the response with the `200` status
  - added the required property `variables` to the response with the `200` status
- **2026-02-28** `1bc45cd7b94e`: 8 info
  - added the new optional request property `doubleOptInContent`
  - added the new optional request property `doubleOptInEnabled`
  - added the new optional request property `doubleOptInFrom`
  - added the new optional request property `doubleOptInSubject`
  - added the optional property `doubleOptInContent` to the response with the `200` status
  - added the optional property `doubleOptInEnabled` to the response with the `200` status
  - added the optional property `doubleOptInFrom` to the response with the `200` status
  - added the optional property `doubleOptInSubject` to the response with the `200` status
- **2026-01-17** `da09bf6f14b1`: 1 info
  - endpoint added
- **2024-05-21** `ad91eadfd8ee`: 1 breaking
  - api path removed without deprecation

---

[Operation](https://skmtc.dev/usesend/apis/usesend-api/docs/v1/contactBooks/:contactBookId/patch.md) - [API](https://skmtc.dev/usesend/apis/usesend-api.md) - [Page](https://skmtc.dev/usesend/apis/usesend-api/changes/v1/contactBooks/:contactBookId/patch)