Callr REST API v2.0 (2.1.4)

The Callr REST API gives you programmatic control over the only API-first voice platform that owns its carrier network. Build voice and SMS into your product - without becoming a telco - across 220+ countries.

With the Callr REST API, you can:

• Make, receive, and control phone calls and SMS with standard HTTP requests
• Search, buy, and manage phone numbers worldwide
• Automate call flows with Callr Actions - a declarative, YAML-based framework inspired by GitHub Actions: IVRs, routing, AI Voice Agents, and more
• Record and transcribe calls, and turn every conversation into structured data: transcripts, AI summaries, sentiment, and intent - defined in your prompts, not ours
• Bring your own AI model - GPT, Claude, Mistral, Llama, or your in-house stack
• Receive real-time webhooks for calls, SMS, numbers, billing, and more
• Push conversation data into your CRM, BI, or analytics stack

Everything runs serverless on carrier-grade infrastructure - owned, not resold - handling millions of calls a day, with your choice of EU or US jurisdiction for data sovereignty.