Test Real API Calls. Right in Your Browser.
Send live GET, POST, PUT, PATCH, and DELETE requests, inspect real responses, and debug your integration — no Postman, no setup required.
What It Is
API Playground is an in-browser tool to send real, live requests to Calling Hub's APIs and instantly see the response — perfect for testing before writing production code.
Why Developers Use It
Instead of setting up a separate API client, developers can authenticate, build a request, and see exactly how the API behaves — directly inside the Developer Portal.
Key Capabilities
Live API Testing
Send real requests and get real responses instantly — no mocking, no stubs
Full Method Support
GET, POST, PUT, PATCH, and DELETE requests all supported
Request Builder
Visual editor for headers, query parameters, and JSON request bodies
Authentication Testing
Test with your actual API keys or OAuth tokens directly
Response Viewer
See response body, headers, HTTP status code, and response time side by side
Error Debugging
Instantly see detailed error messages and codes when something is wrong
What's Inside
A side-by-side interface: build your request on one side, hit send, and view the complete response — including status, headers, and timing — on the other.
Who It's For
Developers actively integrating Calling Hub, QA engineers testing endpoints, and anyone who wants to understand API behavior hands-on before deploying.
// Live request built in the Playground
POST https://api.callinghub.io/v2/messages/sms
Authorization: Bearer ch_live_sk_xxxxxxxxxxxx
Content-Type: application/json
{
"from": "+1234567890",
"to": "+0987654321",
"body": "Your OTP is 482910. Valid for 5 minutes."
}
// Instant live response ↓
HTTP 200 OK • 142ms
{
"messageId": "ch_msg_9d3f7a2e",
"status": "queued",
"deliveredAt": null
}Getting Started
Open API Playground
Launch the Playground from your developer dashboard — no installation required
Select an endpoint and method
Choose a category, pick your endpoint, and add headers or body parameters
Send the request
Hit send and inspect the live response, status code, and response time instantly