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API Versioning Strategies | Backward Compatibility Guide

Implement API versioning with URI, header, or query parameter approaches. Maintain backward compatibility while evolving services. Migration and deprecation guides.

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API versioning strategies ensure smooth evolution of APIs while maintaining compatibility. GitScrum helps teams track API changes, versioning decisions, and client migration across development cycles.

API versioning lifecycle

Design API ──► Implement v1 ──► Plan Changes ──► Release v2 ──► Deprecate v1 ──► Remove v1
     │              │              │              │              │              │
     â–¼              â–¼              â–¼              â–¼              â–¼              â–¼
  Requirements   First Release   Breaking Changes  Backward      Sunset Period  End of Life
  Gathering      & Documentation  Analysis         Compatible     & Migration   Communication
                                                  Updates        Support

Versioning strategies

  • URI versioning: /api/v1/users, /api/v2/users - clear and explicit
  • Header versioning: Accept: application/vnd.api.v1+json - content negotiation
  • Query parameter: /api/users?version=1 - flexible but less RESTful
  • Media type: application/vnd.company.resource.v2+json - semantic versioning

API evolution best practices

Breaking Changes ──► New Version ──► Deprecation ──► Migration ──► Removal
        │                  │              │              │            │
        â–¼                  â–¼              â–¼              â–¼            â–¼
  Impact Analysis     Semantic Versioning  Warning Headers  Client Updates  End of Support
  & Communication                       & Documentation

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