VOICE API

Programmable voice for developers

Build calling, IVR, recording, and live transcription straight into your product with a REST API and real-time webhooks.

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Make a call in one request

Simple REST endpoints, real-time webhooks, and SDKs for the languages you already use.

curl https://api.callemilio.com/v1/calls \

  -H "Authorization: Bearer YOUR_API_KEY" \

  -d to="+14155550100" \

  -d from="+14155550199" \

  -d webhook_url="https://yourapp.com/voice"

FEATURES

Built for developers

REST & webhooks

Trigger calls, IVRs, and recordings with simple HTTP requests and real-time event webhooks.

Call recording API

Start, stop, and fetch recordings programmatically, with signed download URLs.

Real-time transcription

Stream live transcripts of any call over WebSocket for agent assist or QA.

Programmable IVR

Define call flows in JSON or use our visual builder — both compile to the same engine.

SDKs for every stack

Official libraries for Node.js, Python, PHP, and Java, with community SDKs for the rest.

99.99% uptime SLA

Built on redundant infrastructure across multiple regions with automatic failover.

FAQ

Voice API questions

Is there a sandbox environment?

Yes, every account gets a free sandbox with test numbers so you can build before going live.

What's the rate limit?

Standard accounts get 50 requests/second; higher limits are available on Enterprise plans.

Do you support outbound and inbound calling?

Yes, the API covers both directions, plus call transfer, conferencing, and recording.