Zernio
Zernio
API Reference

Call History

List all calls (unified history)GETGet a call recordingGETGet a call (any channel)GET
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Call History

Get a call recording

Channel-agnostic recording fetch: resolves a fresh, playable MP3 URL for any call regardless of channel (provider-signed URLs expire ~10 minutes after signing, so this re-signs on demand). Default responds 302 Found redirecting to the fresh URL; pass as=json to receive { url } instead.

GET
/v1/calls/{id}/recording

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

Query Parameters

as?"json"

json returns { url } instead of a 302 redirect.

Value in

  • "json"

Response Body

application/json

application/json

application/json

import Zernio from '@zernio/node';const zernio = new Zernio({ apiKey: process.env.ZERNIO_API_KEY });const { data } = await zernio.calls.getCallRecording({  path: {    id: 'abc123',  },});console.log(data);
{  "url": "string"}
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List all calls (unified history)

Unified call history across ALL of your numbers: both channels (WhatsApp Business Calling + regular phone/PSTN), inbound and outbound, newest first. Unlike `GET /v1/voice/calls` (PSTN-only) and `GET /v1/whatsapp/calls` (one account at a time), this endpoint needs no `accountId` and never requires fanning out one request per number. Any row can be opened channel-agnostically via `GET /v1/calls/{id}` and `GET /v1/calls/{id}/recording`; no branching on `channel` needed. When the counterparty number matches a CRM contact, `contactId` and `contactName` are set. Cursor pagination: pass the returned `nextCursor` as `before` to fetch the next page. `nextCursor` is null on the last page.

Get a call (any channel)

Channel-agnostic call detail: works for both WhatsApp and regular phone (PSTN) calls, so any row from `GET /v1/calls` can be opened without branching on `channel`. Returns the full call including transcript segments, with `contactId`/`contactName` set when the counterparty matches a CRM contact.