SpectoLabs/hoverfly
Some data may be outdated — see provenance labels.
Lightweight service virtualization/ API simulation / API mocking tool for developers and testers observed · 2026-09-29
Health v2 · maintenance only
97/100
- Activity 97
- Release rhythm 96
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 15.5
- age_days: 3977
- days_rel: 29
- days_push: 22
- n_releases_24m: 29
Adoption not part of the score
2524 stars · 230 forks observed · 2026-09-29
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Hoverfly is a lightweight open-source API simulation and service virtualization tool written in Go. It captures HTTP/HTTPS traffic and replays it as simulations, allowing developers and testers to replace real API dependencies with fast, controllable mocks.
Use cases
- mock external APIs during integration testing
- simulate slow or flaky third-party API dependencies
- simulate network latency, random failures, and rate limits
- capture real HTTP traffic and replay it as stubs
- run API mocks in CI pipelines instead of live sandboxes
- virtualize REST APIs that are not yet built
When to choose
- you need HTTP/HTTPS API mocking or service virtualization in tests
- your test suites are slowed by unavailable or unreliable downstream APIs
- you want to test edge cases like latency, failures, and rate limiting
- you prefer a lightweight, self-hosted alternative to commercial virtualization tools
When to avoid
- you need to virtualize non-HTTP protocols like databases or message queues
- you want a hosted, managed simulation platform (consider Hoverfly Cloud)
- you only need simple unit-test mocks in a single language where a library-level mock suffices
Facets
cli-tool · maturity active
testing mocking http-server proxy middleware testing developer-tools apis web-development cross-platform cli go api-simulation service-virtualization api-mocking stubbing mitm-proxy http-mocking test-doubles automation docker
5 sources
- readme: https://github.com/SpectoLabs/hoverfly · fetched 2026-09-29 · a4ba8ff10b3c
- homepage: https://hoverfly.io · fetched 2026-08-29 · 8b30c233b809
- site_page: https://docs.cloud.hoverfly.io/ · fetched 2026-08-29 · 20b005c511d3
- site_page: https://hoverfly.io/pricing · fetched 2026-08-29 · adec026e92be
- site_page: https://hoverfly.io/blog/tag/releases · fetched 2026-08-29 · 22a5c458c9b0
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| SpectoLabs/hoverfly | main | 97 |
For agents
markdown · JSON · MCP: product_card(name="SpectoLabs/hoverfly")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem