API Integration
Full REST API with SDKs for PHP, Node.js, Python, and Ruby. Manage numbers, deploy scenarios, initiate calls, send SMS, export CDRs, and configure webhooks — all programmatically. OpenAPI spec available.
Overview
Callr's REST API provides complete programmatic access to the platform. Every feature available in the Portal can be automated via API: number provisioning, scenario management, call initiation, SMS sending, CDR export, and configuration.
SDKs
Official SDKs available for PHP, Node.js, Python, and Ruby. Each SDK wraps the REST API with language-idiomatic interfaces, authentication handling, and error management. Open-source on GitHub.
API Reference
Full API documentation with interactive examples at docs.callr.com. OpenAPI (Swagger) specification available for code generation and tooling integration. Versioned API with backward compatibility guarantees.
Authentication
API key-based authentication with scoped permissions. Rate limiting with published limits per endpoint. Sandbox mode for testing without affecting production.
Others features
We own our network
Global coverage
Order numbers in just one click in over 220 countries, including premium, vanity or toll-numbers.
Encrypted and secure
We offer state-of-the-art data encryption with HTTPS, SIP TLS & SRTP.
Reliable network
With multiple data centers and servers around the world, we offer a robust service you can rely on.
Registered carrier
We operate our own network for better performance, localization and support.
