Keploy

Keploy is an open-source API and integration testing tool that generates tests from real traffic instead of requiring a developer to hand-write them. It uses eBPF to capture API calls, database queries, and streaming events at the network layer while an application runs normally - meaning no SDK to install and no code changes - then turns that captured traffic into replayable test cases and data mocks.

Because it replays recorded, realistic traffic rather than synthetic requests a developer imagined, it's well suited to catching regressions in complex, distributed request flows without hand-maintaining a large suite of API test fixtures, and it's language-agnostic since capture happens at the network layer rather than inside application code.

Keploy is a fit for teams that want API and integration test coverage generated from actual usage rather than written from scratch, complementing Cypress and Playwright (also in this catalog), which test browser-based user flows rather than backend API and integration behavior.