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MicrocksMockServer
Free

Free and open source.

 Free

Free and open source with no SaaS account needed.

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

Checked October 2, 2026

Checked September 24, 2026

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