Setting up a Webhook for Braintree Marketplace
Step 1 - Log into your Braintree Account: https://www.braintreegateway.com/login
Step 2 - Choose Settings > Webhooks
Step 3 - Choose Create New Webhook
Step 4 - In Destination URL you will add your domain followed by /webhooks/braintree_marketplace. For example:
Finally, check the boxes for Sub Merchant Account Approved and Sub Merchant Account Declined and then click on Create Webhook to finish the set up.