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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Voice & Calling

Attach a number to a SIP trunk

Routes the number's calls to the trunk: the external platform receives its inbound directly and can present it as outbound caller ID. While attached, Zernio-side voice features are off for this number (call forwarding, IVR, voicemail, recording, the softphone, and WhatsApp calling), so the number must have Calls and WhatsApp calling disabled before attaching. SMS and WhatsApp messaging are unaffected.

POST
/v1/phone-numbers/{id}/sip-trunk

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Path Parameters

id*string

Phone number record ID (from GET /v1/phone-numbers).

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

{  "attached": true,  "phoneNumber": "string",  "trunkId": "string"}
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Disable phone calling on a number

Turns off PSTN calling for the number. The stored forward destination and settings are preserved, so re-enabling restores the prior config.

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.

trunkId*string

SIP trunk ID (from POST /v1/phone-numbers/sip-trunks).