REST Client
UtiliStudio Workspace ToolCraft, test, and inspect HTTP requests in an intuitive interface. Support for custom headers, query parameters, request bodies, and response diagnostics.
Key Capabilities
Multi-Method HTTP Testing
Execute GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests against REST endpoints and microservices.
Headers & Query Parameters
Easily add, edit, and toggle authentication tokens, custom headers, and URL query parameters with key-value editors.
Response Inspection & Metrics
Examine formatted response bodies, response headers, HTTP status codes, payload sizes, and round-trip request latency.
Environments & cURL Integration
Organize API requests into collections, configure environment variables with {{variable}} syntax, and import or export cURL commands.
How to Use REST Client
Select HTTP method & enter URL
Choose your request method (GET, POST, PUT, DELETE, etc.) and enter the destination API endpoint URL.
Configure headers & request body
Add authentication headers, query parameters, or JSON payloads into the structured request tabs.
Send request & inspect response
Click Send to dispatch the request. Review formatted response data, status codes, response headers, and execution timing.
Save to collection or export cURL
Organize the request into reusable collections, save environment variables, or export the full command to cURL.
Practical Examples
Testing a JSON REST API Endpoint
Send a POST request with an application/json payload to create a resource and inspect the returned response.
POST https://api.example.com/v1/users
Content-Type: application/json
Authorization: Bearer test_token_xyz
{
"name": "Jane Doe",
"email": "jane@example.com",
"role": "developer"
}Status: 201 Created (142ms)
Content-Type: application/json
{
"id": "usr_9481",
"name": "Jane Doe",
"email": "jane@example.com",
"role": "developer",
"createdAt": "2026-09-19T18:00:00Z"
}Common Use Cases
Debugging REST API Endpoints
Quickly verify endpoint contracts, request payloads, and status codes during backend development.
Testing Webhook Integrations
Craft mock payload deliveries and inspect headers to ensure third-party webhook receivers handle events correctly.
Validating Authentication & Headers
Test Bearer tokens, API keys, and custom authorization headers against protected routes.
cURL Command Translation
Paste cURL commands from documentation into an interactive UI and vice versa for easy terminal sharing.
Frequently Asked Questions
How does REST Client handle browser CORS restrictions?
When target servers do not permit cross-origin requests directly from the browser, REST Client can route requests through a development proxy to inspect responses without CORS barriers.
Can I import and export cURL commands?
Yes. You can paste standard cURL commands into the client to auto-populate request settings, or export your configured request as a runnable cURL string.
Are environment variables supported?
Yes. You can configure environment variables (like base URLs or authentication keys) and reference them dynamically using double curly braces such as {{base_url}}.
Related Developer Tools
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Validate JSON payloads against JSON Schema standards with detailed error feedback.
Essential developer helpers including hash generators, base64 encoders, and regex testers.
Ready to use REST Client?
Launch the full workspace tool directly in your browser.