How to test a POST request with JSON body?

To test a POST request with JSON: 1) Select POST from the method dropdown. 2) Add Content-Type: application/json header. 3) Switch to the Body tab. 4) Enter your JSON payload. 5) Click Send. The response will show if your data was accepted by the API.

Penguji API

Uji API HTTP dengan header dan body kustom — GET, POST, PUT, DELETE, dan lainnya

⚠️

Pemberitahuan Keamanan

Alat ini menggunakan proxy sisi server. JANGAN gunakan dengan kunci API produksi atau token sensitif.

Masukkan URL dan klik Kirim untuk menguji API

Tentang Alat Ini

API Tester is a free online tool for testing HTTP APIs without dealing with browser CORS restrictions. It supports all common HTTP methods including GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. You can customize request headers, add request bodies in JSON or other formats, and view detailed response information including status codes, headers, and response time. The tool uses a server-side proxy to bypass CORS limitations, allowing you to test APIs from any domain. Whether you're debugging your own API endpoints, testing third-party services, or learning about HTTP protocols, this tool provides a simple and effective interface for API testing.

Cara Penggunaan

Enter the target API URL in the address field. Make sure to include the full URL with protocol (http:// or https://).
Select the HTTP method from the dropdown (GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS).
Click on the Headers tab to add custom headers. Use the preset buttons for common headers like Content-Type or Authorization, or add custom headers manually.
For POST, PUT, or PATCH requests, switch to the Body tab and enter your request payload. You can format JSON using the Format JSON button.
Click the Send button to execute the request. The response will show status code, response time, headers, and body content.

Pertanyaan yang Sering Diajukan

An API tester is a tool that allows you to send HTTP requests to API endpoints and inspect the responses. It's essential for developers to debug APIs, test integrations, verify response formats, and troubleshoot issues. Our free online API tester lets you test REST APIs without installing any software, making it perfect for quick API testing during development.

Testing a REST API online is simple: 1) Enter the API endpoint URL (e.g., https://api.example.com/users). 2) Select the HTTP method (GET, POST, PUT, DELETE). 3) Add required headers like Content-Type or Authorization. 4) For POST/PUT, add a JSON request body. 5) Click Send to see the response with status code, headers, and body. Our tool bypasses CORS restrictions, so you can test any public API.

The tool uses a server-side proxy approach. When you send a request, it goes to our Next.js API route first, which then forwards the request to the target API from the server. Since servers are not subject to browser CORS policies, this allows you to test APIs from any domain without encountering cross-origin errors.

Yes! Click the '+ Authorization' preset button to add an Authorization header, then paste your Bearer token. You can also manually add any custom header like X-API-Key, X-Auth-Token, or OAuth tokens. This makes it easy to test authenticated API endpoints without setting up a full development environment.

The tool supports all standard HTTP methods: GET (retrieve data), POST (create resources), PUT (update/replace resources), PATCH (partial updates), DELETE (remove resources), HEAD (get headers only), and OPTIONS (check supported methods). Each method can be selected from the dropdown menu.

Yes, the proxy server only forwards your request and returns the response. We don't log or store your request data, API keys, or responses. However, for production APIs containing sensitive data, we recommend using this tool for testing purposes only and not for accessing production secrets.

To test a POST request with JSON: 1) Select POST from the method dropdown. 2) Add Content-Type: application/json header (use the preset button). 3) Switch to the Body tab. 4) Enter your JSON payload like {"name": "test", "email": "test@example.com"}. 5) Click Send. The response will show if your data was accepted by the API.

Yes! Our API tester provides core Postman-like features for free: multiple HTTP methods, custom headers, JSON request body, response formatting, and CORS bypass. It's perfect for quick API testing without installing software. While it doesn't have collections or environments like Postman, it covers most everyday API testing needs.

Contoh

Test GET Request — Fetch User Data

Retrieve user information from a REST API. Use for: testing public APIs, verifying endpoints, checking response format.

GET https://jsonplaceholder.typicode.com/users/1

Test POST Request — Create New Resource

Send data to create a new record. Use for: form submissions, creating records, testing CRUD operations.

POST https://jsonplaceholder.typicode.com/posts
Body: {"title": "Test", "body": "Content", "userId": 1}

Test PUT Request — Update Resource

Replace an existing resource entirely. Use for: updating records, testing update endpoints.

PUT https://jsonplaceholder.typicode.com/posts/1
Body: {"id": 1, "title": "Updated", "body": "New content", "userId": 1}

Test DELETE Request — Remove Resource

Delete a resource from the server. Use for: testing delete endpoints, cleanup operations.

DELETE https://jsonplaceholder.typicode.com/posts/1

Test API with Bearer Token Auth

Send authenticated request with JWT token. Use for: testing protected endpoints, OAuth flows.

GET https://api.example.com/profile
Headers: Authorization: Bearer eyJhbGciOiJIUzI1NiIs...

Test API with API Key Authentication

Use X-API-Key header for authentication. Use for: third-party APIs, service integrations.

GET https://api.example.com/data
Headers: X-API-Key: your-api-key-here

Test JSON Placeholder API

Free fake API for testing and prototyping. Use for: learning REST APIs, testing tools, demos.

GET https://jsonplaceholder.typicode.com/posts

Test Weather API Endpoint

Fetch weather data from public API. Use for: testing query parameters, JSON response parsing.

GET https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&current_weather=true

Test GraphQL API Endpoint

Send GraphQL query via POST. Use for: testing GraphQL servers, mutation testing.

POST https://countries.trevorblades.com/
Body: {"query": "{ country(code: \"US\") { name currency } }"}

Test API Response Headers

Use HEAD method to check headers only. Use for: checking CORS headers, cache policies, rate limits.

HEAD https://api.github.com

Test PATCH Request — Partial Update

Update specific fields only. Use for: partial updates, modifying single properties.

PATCH https://jsonplaceholder.typicode.com/posts/1
Body: {"title": "New Title Only"}

Test API with Custom User-Agent

Override User-Agent header. Use for: testing API behavior, bypassing bot detection.

GET https://httpbin.org/user-agent
Headers: User-Agent: MyCustomApp/1.0

Alat Terkait

Pemformat JSON

Percantik, validasi, dan minifikasi data JSON

Dekoder JWT

Dekode dan periksa JSON Web Token

Enkode / Dekode URL

Enkode atau dekode URL dan parameter kueri

Enkode / Dekode Base64

Enkode teks ke Base64 atau dekode Base64 ke teks

Tentang Alat Ini

Cara Penggunaan

Enter the target API URL in the address field. Make sure to include the full URL with protocol (http:// or https://).

Select the HTTP method from the dropdown (GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS).

Click on the Headers tab to add custom headers. Use the preset buttons for common headers like Content-Type or Authorization, or add custom headers manually.

For POST, PUT, or PATCH requests, switch to the Body tab and enter your request payload. You can format JSON using the Format JSON button.

Click the Send button to execute the request. The response will show status code, response time, headers, and body content.

Pertanyaan yang Sering Diajukan

Contoh

Test GET Request — Fetch User Data

Retrieve user information from a REST API. Use for: testing public APIs, verifying endpoints, checking response format.

GET https://jsonplaceholder.typicode.com/users/1

Test POST Request — Create New Resource

Send data to create a new record. Use for: form submissions, creating records, testing CRUD operations.

POST https://jsonplaceholder.typicode.com/posts
Body: {"title": "Test", "body": "Content", "userId": 1}

Test PUT Request — Update Resource

Replace an existing resource entirely. Use for: updating records, testing update endpoints.

PUT https://jsonplaceholder.typicode.com/posts/1
Body: {"id": 1, "title": "Updated", "body": "New content", "userId": 1}

Test DELETE Request — Remove Resource

Delete a resource from the server. Use for: testing delete endpoints, cleanup operations.

DELETE https://jsonplaceholder.typicode.com/posts/1

Test API with Bearer Token Auth

Send authenticated request with JWT token. Use for: testing protected endpoints, OAuth flows.

GET https://api.example.com/profile
Headers: Authorization: Bearer eyJhbGciOiJIUzI1NiIs...

Test API with API Key Authentication

Use X-API-Key header for authentication. Use for: third-party APIs, service integrations.

GET https://api.example.com/data
Headers: X-API-Key: your-api-key-here

Test JSON Placeholder API

Free fake API for testing and prototyping. Use for: learning REST APIs, testing tools, demos.

GET https://jsonplaceholder.typicode.com/posts

Test Weather API Endpoint

Fetch weather data from public API. Use for: testing query parameters, JSON response parsing.

GET https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&current_weather=true

Test GraphQL API Endpoint

Send GraphQL query via POST. Use for: testing GraphQL servers, mutation testing.

POST https://countries.trevorblades.com/
Body: {"query": "{ country(code: \"US\") { name currency } }"}

Test API Response Headers

Use HEAD method to check headers only. Use for: checking CORS headers, cache policies, rate limits.

HEAD https://api.github.com

Test PATCH Request — Partial Update

Update specific fields only. Use for: partial updates, modifying single properties.

PATCH https://jsonplaceholder.typicode.com/posts/1
Body: {"title": "New Title Only"}

Test API with Custom User-Agent

Override User-Agent header. Use for: testing API behavior, bypassing bot detection.

GET https://httpbin.org/user-agent
Headers: User-Agent: MyCustomApp/1.0