Endava/cats
CATS is a REST API Fuzzer and negative testing tool for OpenAPI endpoints. CATS automatically generates, runs and reports tests with minimum configuration and no coding effort. Tests are self-healing and do not require maintenance. observed · 2026-08-28
Health v2 · maintenance only
85/100
- Activity 94
- Release rhythm 65
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 33
- age_days: 2344
- days_rel: 154
- days_push: 40
- n_releases_24m: 16
Adoption not part of the score
1367 stars · 90 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
CATS (Contract API Testing and Security) is a REST API fuzzer and negative testing tool for OpenAPI endpoints. It automatically generates, runs, and reports thousands of tests from 100+ fuzzers with no coding effort, and tests are self-healing when the OpenAPI spec changes.
Use cases
- fuzz my REST API endpoints automatically
- generate negative tests from an OpenAPI spec
- find bugs in API contract validation
- run boundary testing on API fields and headers
- security-test OpenAPI endpoints without writing code
- catch API regressions when the swagger spec changes
When to choose
- you have an OpenAPI/Swagger spec and want automated negative and boundary testing with zero coding
- you want self-healing API tests that adapt to spec changes
- you need broad API security and contract fuzzing coverage quickly
When to avoid
- your API has no OpenAPI specification
- you need highly customized, hand-written integration or E2E test scenarios
- you are testing GraphQL, gRPC, or non-REST protocols
Facets
cli-tool · maturity active
testing fuzzing e2e-testing security cli testing apis security developer-tools cli cross-platform jvm windows openapi rest-api negative-testing api-fuzzing contract-testing swagger java graalvm command-line linux macos
1 source
- readme: https://github.com/Endava/cats · fetched 2026-08-28 · 2ea0c6c6726b
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| Endava/cats | main | 85 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem