Build HTTP requests and test a CORS-enabled API

Build the request first, then use Send to contact the target API directly from your browser. Browser CORS restrictions still apply.

Request details stay in this tab. KivTools has no proxy: a request is sent only when you choose Send, and browser CORS rules still apply.

Request builder

Use a public API or one that explicitly permits this website with CORS. Credentials are omitted by default and no request is routed through KivTools.

Query parameters

Request headers

Use one Header-Name: value pair per line. Browser-restricted headers are rejected before sending.

Authentication

Body type

Request body

Import an OpenAPI operation

Paste or choose a local OpenAPI JSON/YAML document. The tool reads paths, methods, server defaults, parameters, and a sample request body without fetching a URL.

No local API definition has been analyzed.

Generated request

cURL

Build a request to generate cURL.

Fetch

Build a request to generate Fetch code.

Response

No request has been sent.

Response headers

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Response preview

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Build browser-visible API requests before moving to a full client

This utility creates requests and calls only the URL you explicitly enter. It cannot bypass CORS, browser security controls, private network restrictions, or authentication flows. Review generated code and use safe test credentials.