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MockServerMicrocks
Free

Free and open source with no SaaS account needed.

 Free

Free and open source.

Self-hosted, Command line Self-hosted
  • Mocks and proxies HTTP up to HTTP/3 plus gRPC
  • Records and replays real traffic
  • Mocks REST, gRPC, GraphQL and event-driven APIs
  • Tests implementations against API contracts
  • Aimed at developers and test setups rather than manual API exploration
  • Configuration takes some learning for complex scenarios
  • Needs a server or cluster to run
  • More setup than a desktop API client
Downloadable app, Self-hosted Self-hosted
Open source Open source
License not stated License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.