# Deprecation

> API deprecation, sunset headers, end-of-life management, and API retirement practices, including RFC 8594 Sunset, the Deprecation header, OpenAPI deprecation flags, and consumer migration patterns.

This is the **Deprecation** topic area of [API Evangelist](https://apievangelist.com) — a network of focused knowledge bases drawn from 16 years of independent API research by Kin Lane. Browse all areas at https://apievangelist.com/areas/.

## Related Areas
- [Versioning](https://versioning.apievangelist.com): An index and topic collection covering API versioning patterns, schema evolution, and breaking-change detection acros...
- [Migration](https://migration.apievangelist.com): An index and topic collection covering data migration, cloud migration, database migration, and API migration platfor...
- [Management](https://management.apievangelist.com): An index and topic collection covering full-stack API management platforms — solutions that combine an API gateway, d...
- [Encryption](https://encryption.apievangelist.com): An index and topic collection covering encryption services, key management systems (KMS), hardware security modules (...
- [Change Log](https://change-log.apievangelist.com): An index and topic collection covering developer changelog publishing, release-notes platforms, and API change-tracki...

## More
- [Latest Deprecation stories](/stories/)
- [All API Evangelist topic areas](https://apievangelist.com/areas/)
- [API Evangelist network index (llms.txt)](https://apievangelist.com/llms.txt)