Overview Quickstart Authentication

Guides

SMS Webhooks Build a softphone Calls Errors Changelog

Reference

createPhone Phone Call Errors

SMS

Send an SMS POST List SMS GET Get an SMS GET

Webhooks

sms.received Webhook sms.status Webhook webhook.test Webhook Create a webhook endpoint POST List webhook endpoints GET Delete a webhook endpoint DELETE Send a test event POST List deliveries GET

Calls

Open a WebRTC session POST Close a WebRTC session DELETE Place a call POST Answer a call POST Hang up a call POST Get a call GET List calls GET

Lines & keys

List lines GET Create an ephemeral key POST

Changelog

Changes to the public API.

Within v1, changes are additive only: new commands, events, fields and error codes. Ignore what you do not know. A breaking change would ship as v2.

2026-10-21

First version of the API: SMS over REST, sms.received and sms.status webhooks, calls over WebRTC, ephemeral keys.

Errors

Every error code, what causes it, and what to do.

createPhone

Create the phone that holds the connection, the audio and the calls of one page.

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