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Changelog

May 12, 2026
May 12, 2026

Deprecation Notice: POST /contacts/batch

Effective: 30 October 2026

The Update Multiple Contacts endpoint (POST /contacts/batch) will be deprecated on 30 October 2026. This endpoint is being replaced by the newer and more scalable POST /v3/contacts/import API.

What you need to do

  • Migrate all bulk-update operations to /v3/contacts/import.
  • The deprecated endpoint may stop functioning after the deprecation date.

Why this change?

  • Improved performance and scalability
  • More consistent validation and error handling
  • Supports larger and asynchronous contact imports
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