Newman

Newman is Postman's CLI for running Postman Collections outside the Postman app. It is built for repeatable collection execution in local scripts, CI jobs, and other shell-driven test workflows.

• Run exported Postman collections or collection URLs with environments, globals, iteration data, folder selection, timeouts, SSL options, and file uploads.
• Gate smoke tests or CI checks on collection failures, request errors, and script assertions, then export the final environment, globals, collection, or cookie jar after the run.
• Produce run artifacts through built-in CLI, JSON, and JUnit reporters or custom reporters for downstream dashboards, alerts, or archival.

• newman run is stable and non-interactive once inputs are explicit, and its exit-code behavior makes follow-up shell automation straightforward.
• Machine-readable output is real but file-oriented: the built-in JSON reporter writes a run summary artifact instead of emitting a generic --json stdout stream.
• Best fit when API tests already live as Postman collections and an agent needs to parameterize, execute, and verify those runs from the shell.

• It depends on existing Postman collection artifacts or Postman API URLs, so it is less useful for ad hoc request authoring than raw HTTP CLIs.
• Postman's newer Postman CLI covers some newer product surfaces, while Newman stays focused on open-source collection execution and reporter-driven test runs.