Ten CLI Tools That Can Replace Postman for API Testing in 2026

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A developer writing for DEV Community outlines why CLI-based API testing tools have become a practical alternative to Postman for terminal-driven workflows. The shift was driven by the need to integrate API testing into scripts, Docker containers, and CI/CD pipelines without relying on a graphical application. CLI tools offer advantages such as version-controlling test files in Git, running tests automatically during pull requests or deployments, and compatibility with remote or cloud development environments. AI coding agents like Claude Code can also execute CLI commands directly, enabling automated test-run-fix cycles without manual GUI interaction. The article surveys ten command-line tools ranging from simple HTTP clients like curl to full-featured testing frameworks that support collections, environments, and lifecycle management.

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