Setting up OAuth in N8N

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1. Getting OAuth Client ID and Client Secret

1. Go to developers.facebook.com.
2. Select your app and go to App Settings > Basic.
3. Copy the following:
   • App ID
   • App Secret

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2. Setting up OAuth in N8N

1. In N8N, go to Credentials and create a new OAuth2 credential.
2. Enter:
   • Client ID: Use the App ID from Facebook.
   • Client Secret: Use the App Secret from Facebook.
3. Complete the OAuth flow and save the credential.

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3. Refreshing in Facebook Developer

1. After setting up the connection in N8N, go back to developers.facebook.com.
2. Refresh the page.
3. Go to WhatsApp > Configuration to test the Webhook connection.
4. Make sure to use the Production URL for testing.

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Setting up the WhatsApp API (sending Messages, Templates, etc.) in N8N

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1. After setting up OAuth for Receiving Data

We now want to set up the API to send messages and templates.

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2. Navigate to Business Settings

• Go to business.facebook.com.
• In the bottom left, click on Settings.
• Make sure to select the correct Business Portfolio.

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3. Get the Business Account ID

1. In Settings, go to:
   • Accounts → WhatsApp Accounts
   • Select the WhatsApp Account you want to send messages from.
2. Copy the Business Account ID shown on this page.

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4. Generating the Access Token

1. In the same Business Settings, go to:

   • Users → System Users

2. Click on your System User.

   • If not listed, add yourself as a System User first.

3. Click on Generate Token and follow these steps:

   • Select the correct App.
   • Set Token Expiration to Never (otherwise, the token is valid only for 60 days).
   • Select the following permissions:
     • whatsapp_business_management
     • whatsapp_business_messaging

4. Click on Generate Token.

   • If prompted, verify your account via email and then repeat the selection process.

5. Copy and Paste the Token in the Access Token field in N8N.

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5. Adding Credentials in N8N

1. In N8N, go to Credentials.
2. Add the following:
   • Business Account ID: Paste the ID from Step 3.
   • Access Token: Paste the Token from Step 4.
3. Save the credentials.

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6. Done

The setup is now complete and you can send messages and templates using the WhatsApp API in N8N.