---
title: "Changes to GET /v1/contactBooks"
method: GET
path: "/v1/contactBooks"
---

# Changes to GET /v1/contactBooks

`GET /v1/contactBooks`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 4 of 27 revisions.

- **2026-07-17** `ee7832fe66a6`: 2 info
- **2026-02-28** `1bc45cd7b94e`: 4 info
- **2026-01-17** `da09bf6f14b1`: 1 info
- **2024-05-21** `ad91eadfd8ee`: 1 breaking

## Changes

- **2026-07-17** `ee7832fe66a6`: 2 info
  - the response property `items/_count/contacts` became required for the status `200`
  - added the required property `items/variables` to the response with the `200` status
- **2026-02-28** `1bc45cd7b94e`: 4 info
  - added the optional property `items/doubleOptInContent` to the response with the `200` status
  - added the optional property `items/doubleOptInEnabled` to the response with the `200` status
  - added the optional property `items/doubleOptInFrom` to the response with the `200` status
  - added the optional property `items/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/get.md) - [API](https://skmtc.dev/usesend/apis/usesend-api.md) - [Page](https://skmtc.dev/usesend/apis/usesend-api/changes/v1/contactBooks/get)