Zernio
Zernio
API Reference

Connect

General

Get OAuth connect URLGETComplete OAuth callbackPOSTGet pending OAuth dataGETConnect ads for a platformGET

Facebook

List Facebook pagesGETSelect Facebook pagePOSTList Facebook pagesGETUpdate Facebook pagePUTComplete Meta business loginGET

Google Business

List Google Business Profile locationsGETSelect Google Business Profile locationPOSTAssign Google Business Profile location to another profilePOSTList Google Business Profile locationsGETUpdate Google Business Profile locationPUT

Instagram

List Pages with a linked Instagram accountGETSelect the Page whose Instagram account to connectPOST

LinkedIn

List LinkedIn orgsGETSelect LinkedIn orgPOSTList LinkedIn orgsGETSwitch LinkedIn account typePUT

Pinterest

List Pinterest boardsGETSelect Pinterest boardPOSTList Pinterest boardsGETCreate Pinterest boardPOSTSet default Pinterest boardPUT

Reddit

List Reddit subredditsGETList subreddit flairsGETGet subreddit rulesGETSet Reddit post flairPOSTVote on a Reddit post or commentPOSTSet default subredditPUT

Bluesky

Connect Bluesky accountPOST

Discord

Connect a Discord channelPOST

Slack

List Slack channels for the channel pickerGETConnect a Slack channelPOST

Telegram

Generate Telegram codeGETConnect Telegram directlyPOSTCheck Telegram statusPATCH

Snapchat

List Snapchat profilesGETSelect Snapchat profilePOST

TikTok

Set TikTok brand identityPATCH

OpenAI Ads

Connect an OpenAI Ads accountPOST

WhatsApp

Connect WhatsApp via credentialsPOSTConnect WhatsApp from Embedded SignupPOSTGet Embedded Signup SDK configGETList numbers for selectionGETComplete number selectionPOST

YouTube

List YouTube playlistsGETCreate YouTube playlistPOSTSet default YouTube playlistPUTGet a YouTube video transcriptGET

Shopify

Get Shopify OAuth connect URLGETConnect a Shopify store with a custom-app Admin tokenPOST

WordPress

Get WordPress.com OAuth connect URLGETConnect self-hosted WordPress with an application passwordPOST

Other

Read a Facebook Page's webhook subscriptionGETRe-subscribe a Facebook Page to Zernio's webhooksPOST
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Connect

Connect WhatsApp via credentials

Connect a WhatsApp Business Account by providing Meta credentials directly. This is the headless alternative to the Embedded Signup browser flow.

To get the required credentials:

  1. Go to Meta Business Suite (business.facebook.com)
  2. Create or select a WhatsApp Business Account
  3. In Business Settings > System Users, create a System User
  4. Assign it the whatsapp_business_management and whatsapp_business_messaging permissions
  5. Generate a permanent access token
  6. Get the WABA ID from WhatsApp Manager > Account Tools > Phone Numbers
  7. Get the Phone Number ID from the same page (click on the number)

Warning: connecting subscribes your own Meta app to this WABA with an override callback that redirects its webhook delivery to Zernio. This WABA's events stop reaching any callback URL you had configured before, immediately and with no overlap window. Do not unsubscribe your app from the WABA afterward: that also cuts off Zernio's delivery, and recovery requires calling this endpoint again.

POST
/v1/connect/whatsapp/credentials

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

{  "message": "WhatsApp connected successfully",  "account": {    "accountId": "6507a1b2c3d4e5f6a7b8c9d0",    "platform": "whatsapp",    "username": "+1 555-123-4567",    "displayName": "Acme Corp",    "isActive": true,    "phoneNumber": "+1 555-123-4567",    "verifiedName": "Acme Corp",    "qualityRating": "GREEN"  }}
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Connect an OpenAI Ads account

Connect an OpenAI Ads account using an API key from ChatGPT Ads Manager. The key grants full campaign write access on OpenAI's side (OpenAI does not offer a read-only key scope). Zernio uses it to read ads and performance, and to create and manage campaigns you set up through Zernio (create, status, budget, and cancel). Campaigns created directly in ChatGPT Ads Manager can still be managed there.

Connect WhatsApp from Embedded Signup

Exchange the authorization code Meta's Embedded Signup popup returned. This is the call the Zernio-hosted signup page makes after the popup closes (`GET /v1/connect/whatsapp?signup=hosted`), sending the `wabaId` and `phoneNumberId` Meta reported so exactly the chosen number is connected; when both are omitted the first number the token can see is used. The code never passes through a `redirect_uri`, so `POST /v1/connect/{platform}` cannot accept it. Authenticates with an API key, or with the connect token the hosted flow issues (`X-Connect-Token` header).

profileId*string

Your Zernio profile ID

accessToken*string

Permanent System User access token from Meta Business Suite

wabaId*string

WhatsApp Business Account ID from Meta

phoneNumberId*string

Phone Number ID from Meta WhatsApp Manager

pin?string

The 6-digit two-step verification PIN set on the number. Required if you enabled two-step verification for it, otherwise Meta rejects the Cloud API registration with error 133005 and the number cannot send messages.

Match^\d{6}$