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WireMock

Flexible API mocking and service virtualization

Developer Tools & Git ★ 7.4k stars Medium setup Apache-2.0

WireMock is an open-source tool for mocking HTTP-based APIs and simulating service behavior. It can be run as a standalone self-hosted server for testing and development against virtualized dependencies.

Official siteSource code

Key features

  • HTTP API mocking
  • Request matching and stubbing
  • Fault and latency simulation
  • Record and playback

Strengths

  • Released under the Apache-2.0 license
  • First-class Docker support for quick deployment
  • Mature project with 7.4k GitHub stars
  • Written in Java

Is WireMock secure?

No known vulnerabilities affect WireMock's latest release (3.13.2). OSV.dev lists 3 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2023-41327, published 2023-09-06 (1134 days ago), fixed in 2.35.1, 3.0.3

Source: OSV.dev, checked 2026-10-14. How this is measured.

WireMock replaces

Self-hosted Mockoon alternativesSelf-hosted Postman Mock alternatives

Health badge

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SelfHostIndex: 87 · excellent

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