GET /api/webhook/facebook

This endpoint is used to handle the challenge request from Facebook.

Query Parameters

• hub.challenge: The challenge token from Facebook which must be returned in the response.
• hub.verify_token: The verify token that was set when we registered the webhook. It is the value of "Verify Token" field in the App Dashboard.
• hub.mode: The mode from Facebook. This value is always subscribe.

Validating Verification Requests

Whenever this endpoint receives a verification request, it will:

• Verify that the hub.verify_token value matches the string set in FACEBOOK_WEBHOOK_VERIFY_TOKEN environment variable.
• Respond with the hub.challenge value.

Reference

• Facebook Webhooks Verification Requests
• The app dashboard can be accessed from https://developers.facebook.com/apps/{app_id}/webhooks/?business_id={whatsapp_business_account_id}. Replace {app_id} with the app id and {whatsapp_business_account_id} with the whatsapp business account id.