Zernio
Zernio
API Reference

Voice & Calling

Calls

List phone callsGETPlace an outbound phone callPOSTGet a phone callGETHang up a live callPOSTBlind-transfer a live callPOSTGet a call recordingGETEstimate call costGET

Browser Softphone

Mint a browser softphone sessionPOSTDial from the browser softphonePOST

Number Setup

Enable phone calling on a numberPOSTDisable phone calling on a numberDELETEAttach a number to a SIP trunkPOSTDetach a number from its SIP trunkDELETE

SIP Trunks

List SIP trunksGETCreate a SIP trunkPOSTGet a SIP trunkGETDelete a SIP trunkDELETERotate a SIP trunk's passwordPOST
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llms.txtOpenAPI
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Voice & Calling

List SIP trunks

GET
/v1/phone-numbers/sip-trunks

Authorization

bearerAuth
AuthorizationBearer <token>

API key authentication: send your Zernio API key in the Authorization header, prefixed with Bearer.

In: header

Response Body

application/json

application/json

{  "trunks": [    {      "id": "string",      "label": "string",      "sipHost": "string",      "sipPort": 0,      "transport": "tls",      "termination": {        "uri": "string",        "username": "string"      },      "numbersAttached": 0,      "createdAt": "2019-08-24T14:15:22Z"    }  ],  "enabled": true}
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Detach a number from its SIP trunk

Returns the number's calls to Zernio routing. Idempotent when the number is not attached to any trunk.

Create a SIP trunk

Creates a SIP trunk an external voice platform (Retell, ElevenLabs, Vapi, or any SIP endpoint) can import your Zernio numbers into. The trunk carries both directions: inbound calls on attached numbers are delivered to `sipHost`, and the platform originates outbound calls through `termination.uri` with the digest credentials. The `digestPassword` is returned only by this call (and by rotate-credentials); store it immediately. Attach any number of numbers to a trunk. Several trunks may point at the same host. Each carries its own credentials and spend cap, so separate destinations (e.g. an agency's clients) stay isolated.