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About this Tool
An API Client is a tool that allows developers to send HTTP requests to any API endpoint and inspect the response in real time.
It supports all standard HTTP methods like GET, POST, PUT, PATCH, and DELETE, along with request headers, authentication, and body formats like JSON, form-data, and GraphQL.
Advanced API clients also generate code snippets and help debug authentication and response issues.
REST APIs are the backbone of modern web and mobile applications, and testing them efficiently is essential for every developer.
Our free API Client & Request Builder lets you send HTTP requests directly from your browser, inspect responses, manage authentication, and generate code snippets - no installation required.
How to use
- Enter your API endpoint URL in the request bar
- Select the HTTP method (GET, POST, PUT, PATCH, DELETE, etc.)
- Add query parameters, headers, or authentication if required
- Choose a body type (JSON, form-data, GraphQL, raw, etc.) and enter your payload
- Click Send to execute the request and view the response
- Inspect status code, response body, headers, and response time
- Use the Code Generator to export the request as fetch, Axios, Python, or cURL
Benefits
- Test REST and GraphQL APIs instantly without any installation
- Debug API responses, headers, and status codes in real time
- Support for all HTTP methods including GET, POST, PUT, PATCH, DELETE
- Built-in authentication support for Bearer Token, Basic Auth, and API Key
- Generate ready-to-use code snippets in JavaScript, Python, and cURL
- Save requests to collections and maintain request history for quick access
FAQs
What is an API Client?
An API Client is a tool that lets you send HTTP requests to a server and inspect the response. It is commonly used by developers to test and debug REST or GraphQL APIs.
Do I need to install anything to use this tool?
No. This API Client runs entirely in your browser. No installation, signup, or backend setup is required.
Which HTTP methods are supported?
All standard HTTP methods are supported including GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS, CONNECT, and TRACE.
How do I send a JSON body?
Select the Body tab, choose JSON as the body type, and paste or type your JSON payload. The tool automatically sets the Content-Type header to application/json.
Can I test authenticated APIs?
Yes. The tool supports Bearer Token, Basic Auth, and API Key authentication. You can configure these under the Auth tab before sending your request.
What is the CORS Proxy toggle?
Some APIs block browser requests due to CORS policy. The CORS Proxy routes your request through a third-party proxy to bypass this restriction. Never send production secrets or API keys through the proxy.
Is my request data stored anywhere?
No. All requests are sent directly from your browser. Collections and history are stored locally in your browser and are never sent to any server.