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API Test Base icon

API Test Base

API Test Base is a free, offline-first tool for testing APIs and their side effects — the records an API writes to a database, the messages it publishes to a queue, the downstream services it calls. Test cases are created with a no-code / low-code UI, and the same tests can be...

Test case run result — API invoked and its database side effect verified

Cost / License

  • Free
  • Proprietary

Application type

Platforms

  • Mac
  • Windows
  • Docker
  • Linux
HTTP Request
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API Test Base was added to AlternativeTo by apitestbase on and this page was last updated . API Test Base is sometimes referred to as ATB. 

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What is API Test Base?

API Test Base is a free, offline-first tool for testing APIs and their side effects — the records an API writes to a database, the messages it publishes to a queue, the downstream services it calls. Test cases are created with a no-code / low-code UI, and the same tests can be automated in a CI/CD pipeline.

It is suitable for Integration, ESB and Microservices testing, and is built around the Integration Unit Testing method: testing an API as a black box, in isolation — sending a request to trigger it, then verifying both its response and its side effects.

Currently supported API types: HTTP, SOAP, Relational databases (Oracle, SQL Server, PostgreSQL, H2, etc.), JMS (ActiveMQ, Solace), File, FTP(S), SFTP, AMQP, MQTT, IBM MQ, IBM App Connect Enterprise (ACE; formerly IIB).

Feature highlights

  • Many protocols. Not just HTTP.
  • No code. Low code.
  • Offline first. All your data is stored on your local machine. No internet connection is required to use the tool.
  • Standalone requests, and structured test cases.
  • Built-in data-driven testing.
  • HTTP stubs (mock servers).
  • Pattern-based test case generation.
  • Automated test setup inside the test case.
  • Test automation in CI/CD pipelines.
  • Support Docker.
  • Support VCS (like Git) based team collaboration.

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