Keploy

Overview

Open source Tool for converting user traffic to Test Cases and Data Stubs.

From the official site

Keploy builds a Digital Twin of your production behavior — real API traffic, mocks, and dependencies — so every AI- or human-written change is verified in CI before it ships. Open source, zero code changes.

The text above is quoted from this tool’s official website — the vendor’s own words.

Official FAQ

What is Keploy?

Keploy is an open-source, AI-powered testing platform that turns real application traffic into ready-to-run tests and dependency mocks. It records incoming API requests and outgoing calls to databases, queues, and external services, then replays them as deterministic tests locally, in CI, or across Kubernetes.

Is Keploy an API testing or integration testing tool?

Keploy supports both. Its AI testing platform generates API tests from specifications, requests, and application context. Its record-and-replay platform creates integration and regression tests from real traffic while virtualizing databases, queues, APIs, and other dependencies.

How does Keploy work?

Keploy uses eBPF and a transparent network proxy to capture incoming requests and outgoing dependency calls without instrumenting application code. It stores the captured behavior as editable YAML tests and mocks, then replays the requests against a new build while serving recorded dependency responses.

Does Keploy require code changes?

No application code changes are required for traffic-based record and replay. Keploy observes network activity using eBPF and proxy-based interception, so developers can run their applications normally while Keploy captures requests, database calls, API calls, and other supported dependencies.

How does generating tests from real traffic improve coverage?

Real traffic gives Keploy the requests, responses, dependency interactions, and data states that the application actually handles. Keploy converts this behavior into reproducible tests and mocks, then uses API schemas and application context to generate additional edge cases and flows beyond the recorded examples.

How is Keploy different from Postman?

Postman is primarily used to design, send, organize, and manually test API requests. Keploy can automatically generate tests from real application traffic and capture the backend dependencies involved, including databases, queues, and external APIs. This lets teams replay complete application behavior without manually recreating every request, mock, or dependency state.

These questions and answers come from the tool’s own structured data, not written by us.