APItester

APItester is a software tool designed to test and validate application programming interfaces (APIs). It focuses on automated testing of HTTP-based services and is used to verify endpoint behavior, response data, status codes, and headers. In development, QA, and DevOps workflows, APItester helps teams ensure API reliability before and after deployment.

Core capabilities include authoring and executing test suites, configuring requests with parameters and payloads, and asserting properties of responses. It supports data-driven testing, environment management for staging and production, and automated contract checks against API specifications. APItester can work with REST, GraphQL, and other HTTP-based protocols, and can validate OpenAPI/Swagger definitions, schemas, and security requirements. Optional features may include request mocking, test data generation, and basic performance testing.

APIttester provides multiple interfaces, including a command-line tool and a graphical user interface. Tests are organized into projects and suites and are stored in portable formats such as YAML or JSON, enabling version control and collaboration. The tool typically integrates with continuous integration and deployment pipelines, and it can generate and export reports in HTML, JSON, or JUnit-compatible formats.

Over its development, APItester has evolved from a lightweight utility into a flexible testing framework used by teams of various sizes. It is commonly employed in API-first development, microservices architectures, and API-driven integrations, and is available in community editions and commercial offerings with additional features and support.

By automating API tests, APItester aims to reduce regressions, improve observability, and accelerate delivery by providing repeatable checks across environments.