API Client
Send HTTP requests and test APIs in your browser. Collections, auth, headers, and response inspection — free Postman alternative, no download.
Direct calls the API from your browser (works for most public APIs). Switch to allorigins only if you get a CORS error.
Built-in sample requests
No collections yet. Create one to save requests.
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Frequently Asked Questions
Quick answers to common questions
Is this a free alternative to Postman?+
Yes. Tool Reign API Client lets you send HTTP requests, add headers and auth, save collections, and inspect responses — all free, with no account or download required.
Why am I getting a CORS error?+
CORS errors happen when an API does not allow requests from browsers. Use Direct for APIs that support CORS (httpbin, JSONPlaceholder, most public REST APIs). If blocked, switch to allorigins in the proxy dropdown. Avoid corsproxy.io on production — it often returns 403.
Are my API requests sent through your servers?+
No. Requests go directly from your browser to the target API. Nothing passes through Tool Reign servers. Your API keys and data stay private.
Can I save my requests and collections?+
Yes. Collections are saved in your browser localStorage. They persist across browser sessions. You can also export as JSON and import on another device.
Does it support authentication?+
Yes. Bearer Token, Basic Auth, and API Key authentication are supported. The auth values are auto-injected into request headers or query parameters.
What HTTP methods are supported?+
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS are all supported.