Breaking changes (Change Notices)

Planned DeepL API deprecations and breaking changes that may affect your integration, with the notice for each.

In this section, we’ll outline planned deprecations and breaking changes that might affect applications using the DeepL API.

To learn about new releases, please see the Release notes page.

July 2024: Deprecation of insecure cipher suites

March 2025: Deprecating GET requests to /translate and authenticating with auth_key

November 2025: Deprecating query parameter and request body authentication