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

Upload profile picture

Upload a new profile picture for the WhatsApp Business Profile. Uses Meta's resumable upload API under the hood: creates an upload session, uploads the image bytes, then updates the business profile with the resulting handle.

Provide the image either as a binary upload (multipart/form-data with file) or as a download URL (application/json with url). With a URL we fetch the image server-side and upload the bytes for you. Meta's profile-photo API is bytes-only, so there is no direct URL passthrough. JPEG/PNG, max 5MB either way.

POST
/v1/whatsapp/business-profile/photo

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Request Body

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

{  "success": true,  "message": "string"}
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Update business profile

Update the WhatsApp Business profile. All fields are optional; only provided fields will be updated. Constraints: about max 139 chars, description max 512 chars, max 2 websites.

Get display name status

Fetch the current display name and its Meta review status for a WhatsApp Business account. Display name changes require Meta approval and can take 1-3 business days.

accountId*string

WhatsApp account ID

file*file

Image file (JPEG or PNG, max 5MB, recommended 640x640)

Formatbinary