Keploy – an open-source API and integration testing tool

Keploy, an open-source API and integration testing tool, auto-generates tests and data mocks by recording real API calls, database queries and streaming events and replaying them deterministically, using eBPF to capture traffic at the network layer without SDKs or code changes. Keploy records databases including Postgres, MySQL and MongoDB and queues including Kafka and RabbitMQ, and calculates statement, branch, API schema and business use-case coverage; developers run it via `keploy record -c "CMD_TO_RUN_APP"` and `keploy test -c "CMD_TO_RUN_APP" --delay 10`, with CI/CD integration for Jenkins, GitHub Actions and Kubernetes. Keploy notes that some dependencies are not open-source because their protocols and parsings are not open-sourced, and that these are not supported in Keploy enterprise.

🌟 The must-have tool for developers in the AI-Gen era for 90% test coverage 🌟 Keploy https://keploy.io is a developer‑centric API and integration testing tool that auto‑generates tests and data‑mocks faster than unit tests. It records API calls, database queries, and streaming events — then replays them as tests. Under the hood, Keploy uses eBPF to capture traffic at the network layer, but for you it’s completely code‑less and language‑agnostic . 🐰 Fun fact: Keploy uses itself for testing Check out our swanky coverage badge: Just run your app with keploy record . Real API + integration flows are automatically captured as tests and mocks. Keploy uses eBPF under the hood to capture traffic, so you don’t need to add any SDKs or modify code. Keploy can record and replay complex, distributed API flows as mocks and stubs. It's like having a very light-weight time machine for your tests—saving you tons of time 👉 Read the docs on record-replay https://keploy.io/docs/keploy-explained/introduction/ Unlike tools that only mock HTTP endpoints, Keploy records databases Postgres, MySQL, MongoDB , streaming/queues Kafka, RabbitMQ , external APIs, and more. It replays them deterministically so you can run tests without re‑provisioning infra. 👉 Read the docs on infra virtualisation https://keploy.io/docs/keploy-explained/how-keploy-works/ If you’re a developer , you probably care about statement and branch coverage — Keploy calculates that for you. If you’re a QA , you focus more on API schema and business use‑case coverage — Keploy calculates that too. This way coverage isn’t subjective anymore. Keploy uses existing recordings, Swagger/OpenAPI Schema to find: boundary values, missing/extra fields, wrong types, out‑of‑order sequences, retries/timeouts. This helps expand API Schema, Statement, and Branch Coverage. - 🌐 CI/CD Integration: Run tests with mocks anywhere you like—locally on the CLI, in your CI pipeline Jenkins, Github Actions.. , or even across a Kubernetes cluster. Read more https://keploy.io/docs/running-keploy/api-testing-cicd/ - 🎭 Multi-Purpose Mocks : You can also use Keploy-generated Mocks, as server Tests - 📊 Reporting: Unified reports for API, integration, unit, and e2e coverage with insights directly in your CI or PRs. - 🖥️ Console: A developer-friendly console to view, manage, and debug recorded tests and mocks. - ⏱️ Time Freezing: Deterministically replay tests by freezing system time during execution. Read more https://keploy.io/docs/keploy-cloud/time-freezing/ - 📚 Mock Registry: Centralized registry to manage, reuse, and version mocks across teams and environments. Read more https://keploy.io/docs/keploy-cloud/mock-registry/ curl --silent -O -L https://keploy.io/install.sh && source install.sh Start your app under Keploy to convert real API calls into tests and mocks. keploy record -c "CMD TO RUN APP" Example for Python: keploy record -c "python main.py" Run tests offline without external dependencies. keploy test -c "CMD TO RUN APP" --delay 10 - 📘 Installation https://keploy.io/docs/server/installation/ - 🏁 QuickStarts https://keploy.io/docs/quickstart/quickstart-filter/ Because Keploy intercepts at the network layer eBPF , it works with any language, framework, or runtime —no SDK required. Note: Some of the dependencies are not open-source by nature because their protocols and parsings are not open-sourced. It's not supported in Keploy enterprise. Want a guided walkthrough, dedicated support, or help planning enterprise rollout? Prefer a calendar invite? Mention your availability in the email—we’ll send a calendar invite right away. - 📘 Documentation https://keploy.io/docs/ — Explore the full docs - 💬 Slack Community https://join.slack.com/t/keploy/shared invite/zt-3zcnuqfgl-WYK1NMhslVHsCtNcA1ULwA — Join the conversation - 📜 Contribution Guidelines https://keploy.io/docs/keploy-explained/contribution-guide/ - ❤️ Code of Conduct https://github.com/keploy/keploy/blob/main/CODE OF CONDUCT.md - 📢 Blog https://keploy.io/blog/ — Read articles and updates Whether you're new or experienced, your input matters. Help us improve Keploy by contributing code, reporting issues, or sharing feedback. Together, let's build better testing tools for modern applications.