Testing JSON APIs: Postman, curl, and Automated Assertions
Test JSON APIs with Postman, curl, and automated assertions. Covers request body formatting, response validation, status code checks, and CI integration.
Published:
Tags: json, api, developer-tools
Testing JSON APIs: Postman, curl, and Automated Assertions Every HTTP API ultimately communicates through JSON. A successful response isn't just a 200 status — it's a correctly shaped payload with the right field types, no missing keys, and values that make sense. Testing only the status code leaves a wide class of bugs invisible until production. This guide covers the practical mechanics of JSON API testing: from quick manual checks with curl to automated schema assertions running in CI. Making JSON Requests with curl curl is the fastest way to fire a request and inspect the raw response. The two flags you need for JSON: silences the progress bar. is mandatory for POST/PUT — without it, many servers return 415 Unsupported Media Type or silently ignore the body. Piping to serves as a free…
All articles · theproductguy.in