vCX WhatsApp Onboarding & Messaging

Base URL - Administration

https://backend.admin.versalence.online/api/v2

All protected endpoints require:

Authorization: Bearer <JWT_TOKEN>

1. Authenticate the customer admin

The customer’s admin user logs in with their vCX credentials. The returned JWT is used for all subsequent calls.

POST /api/v2/login
Content-Type: application/json

{
  "email": "admin@customer.com",
  "password": "CustomerAdminPassword"
}

Response:

{
  "success": true,
  "message": "Sign-in successful",
  "token": "<JWT_TOKEN>"
}

Notes:

The user must have email_verified = 'yes'.
The account must be active.
The JWT expiry is controlled by the server (JWT_EXPIRES_IN).
The JWT contains the company uuid. The backend uses this to identify which company to onboard.

2. Get Agency Customers

GET /api/admin/v2/getCustomers
Authorization: Bearer <agency-jwt>

Response:

{
  "success": true,
  "message": "Customers retrieved successfully.",
  "data": [
    {
      "uuid": "...",
      "company_name": "...",
      "company_email": "...",
      "company_id": "AGTSW000012026",
      "account_status": "active",
      "parent_agency_uuid": "...",
      "company_member_since": "...",
      "user_name": "...",
      "user_email": "...",
      "user_phone": "...",
      "user_role": "admin",
      "user_status": "active"
    }
  ]
}

GET /api/admin/v2/clientAgentLogin?client_id=<SUB_ACCOUNT_COMPANY_ID>
Authorization: Bearer <agency-owner-jwt>

How it works

The agency owner logs in via /api/admin/v2/adminLogin to get their own JWT.
They call /api/admin/v2/clientAgentLogin?client_id=<company_id> with that JWT.
The backend validates that the requested account is actually a sub-account under the agency.
It returns a JWT for the sub-account’s first admin user.

Example

GET /api/admin/v2/clientAgentLogin?client_id=AGTSW000012026
Authorization: Bearer <agency-owner-jwt>

Response:

{
  "success": true,
  "message": "User successfully logged in.",
  "token": "<sub-account-jwt>"
}

Base URL - Backend

https://backend.versalence.online

All protected endpoints require:

Authorization: Bearer <JWT_TOKEN>

4. Check WhatsApp integration status

Use this to decide whether the customer still needs to onboard WhatsApp.

GET https://backend.versalence.online/api/v2/getWaba
Authorization: Bearer <JWT_TOKEN>

Not integrated response:

{
  "success": true,
  "message": "no whatsapp data found"
}

Already integrated response:

{
  "success": true,
  "message": "whatsapp data found",
  "data": [
    {
      "app_id": "...",
      "waba_id": "...",
      "access_token": "[hidden]",
      "phone_id": "...",
      "phone_number": "919876543210",
      "display_phone_number": "+91 98765 43210",
      "onboarding_mode": "standard",
      "is_active": true,
      "webhook_subscription_status": "subscribed"
    }
  ]
}

5. Launch Meta Embedded Signup

The mobile app never sees the Meta App ID. It asks the vCX backend for the OAuth URL, opens it in a browser, and polls for the result after Meta redirects back to vCX.

5a. Initiate WhatsApp Embedded Signup

GET https://backend.versalence.online/api/v2/whatsappSignupInit?mode=coexistence
Authorization: Bearer <vCX_JWT_TOKEN>

Query parameters:

Parameter	Required	Values	Default	Description
`mode`	No	`standard`, `coexistence`	`standard`	WhatsApp onboarding mode. Use `coexistence` if the customer wants to keep their existing WhatsApp Business app running alongside vCX.

Response:

{
  "success": true,
  "data": {
    "oauth_url": "https://www.facebook.com/v20.0/dialog/oauth?client_id=...&redirect_uri=...&scope=whatsapp_business_management&response_type=code&state=...",
    "state": "<STATE_TOKEN>",
    "redirect_uri": "https://backend.versalence.online/api/v2/whatsappSignupCallback",
    "scope": "whatsapp_business_management",
    "mode": "coexistence"
  }
}

Mobile app action: Open oauth_url in an in-app browser or WebView. Do not extract or store the Meta App ID.

5b. Meta OAuth callback

After the user completes Meta’s flow, Meta redirects the browser to the vCX backend. The mobile app does not call this endpoint directly.

GET https://backend.versalence.online/api/v2/whatsappSignupCallback?code=<META_AUTH_CODE>&state=<STATE_TOKEN>

What the backend does:

Exchanges the code for a Meta access token.
Resolves the WABA ID and phone number.
Registers the phone number.
Configures the vCX webhook.
Persists the account.
For coexistence mode, requests smb_app_state_sync and history sync from Meta.

On success, the browser is redirected to:

https://backend.versalence.online/whatsapp-signup-success

On failure:

https://backend.versalence.online/whatsapp-signup-failure?error=<ERROR_MESSAGE>

These redirect URLs are configurable via environment variables.

5c. Check WhatsApp signup status

The mobile app should poll this endpoint after the browser is redirected back.

GET /api/v2/whatsappSignupStatus
Authorization: Bearer <vCX_JWT_TOKEN>

Not connected response:

{
  "success": true,
  "message": "No WhatsApp account connected",
  "data": {
    "is_connected": false,
    "onboarding_mode": "standard"
  }
}

Connected response:

{
  "success": true,
  "message": "WhatsApp account connected",
  "data": {
    "is_connected": true,
    "onboarding_mode": "coexistence",
    "is_active": true,
    "waba_id": "...",
    "phone_id": "...",
    "phone_number": "919876543210",
    "display_phone_number": "+91 98765 43210",
    "webhook_subscription_status": "subscribed",
    "expires_in": "...",
    "last_message_at": null,
    "last_smb_message_echo_at": null,
    "last_history_at": null,
    "last_smb_app_state_sync_at": null
  }
}

This endpoint can be queried at any time in the future to check whether WhatsApp is still connected.

6. Get messaging API configuration

GET /api/v2/whatsappApiConfig
Authorization: Bearer <vCX_JWT_TOKEN>

Response:

{
  "success": true,
  "data": {
    "send_messages_url": "https://api.versal.one",
    "create_templates_url": "https://api.versal.one",
    "message_status_url": "https://apiproxy.versal.one"
  }
}

Use these endpoints (documented separately) to send messages, create templates, and check message delivery status.

7. Existing account lookup (backward-compatible)

GET /api/v2/getWaba
Authorization: Bearer <vCX_JWT_TOKEN>>

This existing endpoint continues to work and returns the connected WhatsApp account data. The mobile app may use either /getWaba or /whatsappSignupStatus.

Onboarding modes

Standard mode

GET /api/v2/whatsappSignupInit?mode=standard

Uses the Meta Cloud API onboarding. The customer’s WhatsApp Business app will be replaced by vCX for business messaging.

Coexistence mode

GET /api/v2/whatsappSignupInit?mode=coexistence

The customer’s existing WhatsApp Business app continues to work. vCX receives messages through webhooks while the customer keeps using their native WhatsApp Business app. The backend requests smb_app_state_sync and history sync from Meta during onboarding.

Environment variables

Add these to the vCX backend .env:

# Backend-driven OAuth signup flow for external mobile apps.
# WHATSAPP_OAUTH_REDIRECT_URI must be registered in the Meta app settings.
WHATSAPP_OAUTH_REDIRECT_URI=https://backend.versalence.online/api/v2/whatsappSignupCallback
WHATSAPP_OAUTH_SUCCESS_REDIRECT=https://backend.versalence.online/whatsapp-signup-success
WHATSAPP_OAUTH_FAILURE_REDIRECT=https://backend.versalence.online/whatsapp-signup-failure

# External WhatsApp messaging API endpoints exposed to mobile apps.
WHATSAPP_SEND_MESSAGES_URL=https://api.versal.one
WHATSAPP_CREATE_TEMPLATES_URL=https://api.versal.one
WHATSAPP_MESSAGE_STATUS_URL=https://apiproxy.versal.one

The following existing variables are also used:

APP_ID=
APP_SECRET=
META_API_VERSION=

Prerequisites

The customer account must already exist in vCX (created as a sub-account under the partner’s master account). The customer must have an admin user with verified email and active account status. The WHATSAPP_OAUTH_REDIRECT_URI must be registered in the Meta app settings. Migration 009_add_whatsapp_coexistence_support.sql must be applied to production. It creates the onboarding_sessions and whatsapp_accounts tables required by the new flow.

Coexistence with the existing web dashboard flow

The existing web dashboard flow is unchanged and continues to work:

POST /v2/whatsappSign
POST /v2/whatsappWaba
POST /v2/whatsappPhone
POST /v2/embeddedSignup
GET /v2/getWaba
GET /v2/whatsapp-coexistence/status

The new mobile-app flow is additive:

GET /v2/whatsappSignupInit
GET /v2/whatsappSignupCallback
GET /v2/whatsappSignupStatus
GET /v2/whatsappApiConfig

The removed /v2/whatsapp-coexistence/enable and /v2/whatsapp-coexistence/disable endpoints are no longer needed because the mode is passed directly at signup time.

Error handling

Step	Typical failure	How the mobile app should handle
Login	Invalid credentials	Show error and ask user to retry.
Initiate signup	Missing `APP_ID` / redirect URI	Backend misconfiguration. Contact vCX support.
Meta OAuth	User cancels	Browser redirects to failure page. Poll `/whatsappSignupStatus` to confirm not connected.
Callback	Invalid/expired `state`	Browser redirects to failure page with `error=Invalid or expired onboarding session`.
Callback	Missing WABA or phone number	Browser redirects to failure page. User must retry signup.
Status polling	`is_connected: false`	Continue polling or restart signup.

Summary of API endpoints

Endpoint	Method	Auth	Purpose
`/api/v2/login`	POST	Public	Authenticate and get JWT.
`/api/admin/v2/adminLogin`	POST	Public	Agency owner login.
`/api/admin/v2/getCustomers`	GET	Agency JWT	List sub-accounts.
`/api/admin/v2/clientAgentLogin`	GET	Agency JWT	Get sub-account JWT.
`/api/v2/getWaba`	GET	Any JWT	Check WhatsApp account.
`/api/v2/whatsappSignupInit`	GET	Admin JWT	Get Meta OAuth URL.
`/api/v2/whatsappSignupCallback`	GET	None (Meta calls this)	Complete signup after Meta OAuth.
`/api/v2/whatsappSignupStatus`	GET	Any JWT	Check if WhatsApp is connected.
`/api/v2/whatsappApiConfig`	GET	Any JWT	Get messaging API URLs.

Appendix: Web dashboard 3-step flow

The following endpoints are used by the existing vCX web dashboard. They remain available but are not used by the mobile-app OAuth flow described above.

A1. Exchange code for access token

POST /api/v2/whatsappSign
Authorization: Bearer <JWT_TOKEN>
Content-Type: application/json

{
  "code": "<META_AUTH_CODE>",
  "mode": "coexistence"
}

Response:

{
  "success": true,
  "message": "Access token updated successfully",
  "session_id": "<SESSION_ID>",
  "mode": "coexistence",
  "data": "<ACCESS_TOKEN>"
}

Save session_id and discard data (legacy field).

A2. Resolve WABA ID

POST /api/v2/whatsappWaba
Authorization: Bearer <JWT_TOKEN>
Content-Type: application/json

{
  "session_id": "<SESSION_ID>"
}

Response:

{
  "success": true,
  "message": "WABA ID updated successfully",
  "data": {
    "waba_id": "<WABA_ID>"
  },
  "session_id": "<SESSION_ID>"
}

A3. Resolve phone number and complete signup

POST /api/v2/whatsappPhone
Authorization: Bearer <JWT_TOKEN>
Content-Type: application/json

{
  "session_id": "<SESSION_ID>"
}

Response:

{
  "success": true,
  "message": "Whatsapp embedded signup complete with co-existence mode",
  "mode": "coexistence",
  "phone_number": "919876543210",
  "phone_id": "<PHONE_ID>",
  "webhook_config": "Webhook configured successfully"
}

Role requirement: Admin only for all three steps.

Send messages via vCX

Once onboarding is complete, use the separately documented messaging API to send WhatsApp messages through the vCX platform.

The backend stores the access token and phone ID, so the send-message API only needs the vCX customer JWT (and the recipient/message payload).

Important notes

Legacy endpoint POST /api/v2/embeddedSignup exists as a single-call onboarding flow, but it always uses standard mode and does not support Coexistence. Use the 3-step flow in the appendix for Coexistence via the dashboard.
Token storage: The 3-step flow uses session_id to keep the Meta access token server-side. The mobile-app OAuth flow keeps the token entirely server-side.
No login to vCX web UI required: The mobile app can perform the entire flow via the API calls above.

vCX WhatsApp Onboarding & Messaging

Base URL - Administration

1. Authenticate the customer admin

2. Get Agency Customers

3. Login to Sub Account using company_id

How it works

Example

Base URL - Backend

4. Check WhatsApp integration status

5. Launch Meta Embedded Signup

5a. Initiate WhatsApp Embedded Signup

5b. Meta OAuth callback

5c. Check WhatsApp signup status

6. Get messaging API configuration

7. Existing account lookup (backward-compatible)

Onboarding modes

Standard mode

Coexistence mode

Environment variables

Prerequisites

Coexistence with the existing web dashboard flow

Error handling

Summary of API endpoints

Appendix: Web dashboard 3-step flow

A1. Exchange code for access token

A2. Resolve WABA ID

A3. Resolve phone number and complete signup

Send messages via vCX

Important notes