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

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
Dashboard
llms.txtOpenAPI
OverviewPlatformsAPI ReferenceResources
WhatsApp

Register a connected WhatsApp number on the Cloud API

Re-runs Meta's Cloud API registration for a WhatsApp account that is already connected. Use it when the number has its own two-step verification PIN: the connect flows register with a default PIN, Meta rejects that with error 133005, and the number then fails every send with the misleading '(#200) You do not have the necessary permission to send messages' while the account still shows as connected. The PIN is used for this call only and is not stored.


POST
/v1/accounts/{accountId}/whatsapp/register

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Path Parameters

accountId*string

The WhatsApp account ID

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

{  "registered": true,  "accountId": "string",  "phoneNumberId": "string"}
Was this page helpful?

Get number status

Live snapshot of a connected number straight from Meta: the phone-number node (display number, display name + approval, quality rating, messaging-limit tier, throughput, official-business badge, connection status, health_status) and its owning WhatsApp Business Account (name, business verification, timezone, health_status). Fetched live because Meta updates quality/tier/name/health over time; the call also refreshes the cached values shown on the connection card.

Move a number to another profile

Move a provisioned number to a different profile. A number is not a single record. Alongside the number itself there are hidden telephony owner accounts (platform `phone`, plus `sms` when SMS is enabled) and, once WhatsApp is connected, the `whatsapp` account. They all carry a profileId and this endpoint moves them together. Use this instead of `PATCH /v1/accounts/{accountId}`: that one moves the account only and leaves the number itself pinned to its original profile, which splits the number across two profiles. Connecting a Zernio-provisioned number from any profile but its own is rejected with a `409` (`WHATSAPP_NUMBER_PINNED_TO_PROFILE`). This endpoint is how you re-home the number first, so it can then be connected from the new profile. `id` is the number record id from `GET /v1/phone-numbers`, not an account id. A profile holds at most one account per platform, so the destination must be free of every platform this number occupies.

pin?string

The 6-digit two-step verification PIN set on the number. Omitting it applies Zernio's managed default registration PIN, the same one every Embedded Signup connect sets automatically.

Match^\d{6}$