Zernio
Zernio
API Reference

WhatsApp

Templates

List templatesGETCreate templatePOSTGet templateGETUpdate templatePATCHDelete templateDELETEGet template by idGETUpdate template by idPATCHDelete template by idDELETELook up a library templateGET

Business Profile

Get business profileGETUpdate business profilePOSTUpload profile picturePOSTGet display name statusGETRequest display name changePOSTGet business usernameGETGet username suggestionsGETSet business usernamePOSTDelete business usernameDELETE

Groups

List active groupsGETCreate groupPOSTGet group infoGETUpdate group settingsPOSTDelete groupDELETEAdd participantsPOSTRemove participantsDELETECreate invite linkPOSTList join requestsGETApprove join requestsPOSTReject join requestsDELETE

Blocking

Check if a user is blockedGETList blocked usersGETBlock usersPOSTUnblock usersDELETE

Media

Download WhatsApp mediaGET

Commerce

List the catalogs linked to a WhatsApp numberGETLink a catalog to a WhatsApp numberPOSTUnlink a catalog from a WhatsApp numberDELETEGet a number's commerce settingsGETUpdate a number's commerce settingsPUT

Conversions

Get CTWA conversions datasetGETProvision CTWA datasetPOSTList conversion eventsGETSend WhatsApp conversion eventPOST

Account Events

List account notificationsGET

Phone Numbers

Get number statusGETRegister a connected WhatsApp number on the Cloud APIPOSTMove a number to another profilePATCHRequest a Meta re-verification code for a BYO WhatsApp numberPOSTVerify the Meta re-verification code for a BYO WhatsApp numberPOST

Calling

Get calling config for an accountGETEnable calling on a numberPOSTUpdate calling configPATCHDisable calling on a numberDELETECheck call permissionGETList call history for an accountGETInitiate outbound callPOSTGet a single callGETEstimate per-minute costGETGet calling config for a numberGETGet a call recordingGETStart caller-ID verification for a customer-brought numberPOSTConfirm the caller-ID verification codePOST

Flows

List flowsGETCreate flowPOSTGet flowGETUpdate flowPATCHDelete flowDELETEGet flow JSON assetGETUpload flow JSONPUTGet flow preview URLGETList flow versionsGETPublish flowPOSTDeprecate flowPOSTSend flow messagePOSTList flow responsesGETGet Flows encryption key statusGETRegister a Flows encryption keyPOST

Sandbox

List your sandbox sessionsGETStart a sandbox activationPOSTRevoke a sandbox sessionDELETE

Other

Get pricing analyticsGET
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OverviewPlatformsAPI ReferenceResources
WhatsApp

Check call permission

Returns the permission state and the list of available actions for a given consumer wa_id (e.g. start_call, send_call_permission_request). Use this before placing a call to decide whether to prompt for consent first.

GET
/v1/whatsapp/call-permissions

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Query Parameters

accountId*string
to*string

Consumer wa_id (E.164, leading + optional)

Response Body

application/json

application/json

import Zernio from '@zernio/node';const zernio = new Zernio({ apiKey: process.env.ZERNIO_API_KEY });const { data } = await zernio.whatsappcalling.getWhatsAppCallPermissions({  query: {    accountId: 'account_abc123',    to: 'string',  },});console.log(data);
{  "permission": {    "status": "temporary",    "expiration_time": 0  },  "actions": [    {      "action_name": "send_call_permission_request",      "can_perform_action": true    }  ]}
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Disable calling on a number

Disable calling. Sends calling.status=DISABLED to Meta (best-effort) and flips the local `callingEnabled` flag off. forwardTo and SIP creds are preserved so a re-enable does not lose the destination.

List call history for an account

Compact history listing for a single connected account. Results are scoped to the resolved SocialAccount; profile-scoped team members cannot read calls on sibling accounts. Cursor pagination: pass the returned `nextCursor` as `before` to fetch the next page (same scheme as `GET /v1/calls`). `since`/`until` remain as absolute range filters and combine with the cursor.