Everything You Need to Build, In One Place.
Clear guides, complete API references, and real code examples — so your team integrates Calling Hub in hours, not weeks.
What It Is
Our Documentation is the complete knowledge base for building on Calling Hub — covering everything from your first API call to advanced webhook configurations.
Why Developers Use It
Instead of guessing endpoint behavior or digging through support tickets, developers get structured, always-current documentation with real, runnable examples.
Key Capabilities
Getting Started Guide
Go from signup to your first successful API call in minutes
Authentication Guide
Step-by-step API key & OAuth setup explained clearly
Complete API Reference
Every endpoint, method, header, and parameter documented
SDK Guides
Language-specific setup and usage instructions for all 12+ SDKs
Webhook Guide
How to receive and verify real-time events from Calling Hub
Error Codes Reference
Understand and resolve every API error quickly
Changelog
Track every API update and version change — stay ahead of breaking changes
Best Practices
Recommended patterns for security, rate limits, and scaling
What's Inside
Each API entry includes endpoint, method, headers, parameters, request body, response body, status codes, and working code examples in JavaScript, Python, Java, PHP, C#, Go, and Flutter.
Who It's For
Backend developers, integration engineers, and technical teams building on top of Calling Hub's communication APIs.
// Initialize the Calling Hub client
import CallingHub from '@callinghub/sdk';
const client = new CallingHub({
apiKey: process.env.CALLING_HUB_API_KEY,
});
// Make your first API call
const call = await client.voice.initiateCall({
from: '+1234567890',
to: '+0987654321',
callbackUrl: 'https://yourapp.com/webhooks',
});
console.log('Call started:', call.id);Getting Started
Create an account
Sign up for a developer account and generate your first API key from the dashboard
Read the Getting Started guide
Follow a working example in your language of choice to make your first API call
Explore the full API Reference
Browse every endpoint, parameter, and response format as you build out your integration