How to use Postman REST API Tester
- Enter the URL and any method, headers or body into Postman REST API Tester.
- Trigger Postman REST API Tester and it sends the request from your browser, not from this site.
- Read the response Postman REST API Tester shows below — it comes from the API you entered, not from this site.
About this tool
Postman REST API Tester runs in your browser with no backend of its own. Postman REST API Tester sends HTTP requests from your browser to the API endpoint you enter and shows the status, headers and body of the response.
Because the call is made by your browser, it follows the same CORS rules as any web page, so some cross-origin APIs may refuse to respond. The request is sent from your browser straight to the API you name; this site has no backend and never receives it, though that server and your network can see it. Cross-origin calls follow the browser's CORS rules, and a connection is required.
Frequently asked questions
What does Postman REST API Tester do?
Postman REST API Tester sends the HTTP request you configure from your browser to the API you specify and shows the response status, headers and body.
Is Postman REST API Tester free to use?
Yes — Postman REST API Tester is completely free, with no usage limits.
Does Postman REST API Tester send my request anywhere?
Yes — Postman REST API Tester sends the request from your browser directly to the URL you enter. This site has no backend and never receives it, but the target server and your network do, and cross-origin calls follow browser CORS rules.
Can Postman REST API Tester call any API from the browser?
Postman REST API Tester can call any endpoint your browser is allowed to reach, but cross-origin APIs must send permissive CORS headers or the browser will block the response — that is a browser rule, not a limit of Postman REST API Tester.