# Klaviyo & ESP DM Webhook Schema Generator > Build and validate custom JSON webhook schemas to sync Instagram DM leads directly into Klaviyo, ConvertKit, or Mailchimp. - **Category / Silo**: social - **Free Access**: Yes (No credit card required) ## Tool Description Build and validate custom JSON webhook schemas to sync Instagram DM leads directly into Klaviyo, ConvertKit, or Mailchimp. ## Key Steps & Implementation 1. **Select ESP Platform**: Choose Klaviyo, ConvertKit, Mailchimp, or Custom REST API. 2. **Input Target List ID**: Enter your ESP subscriber list key or API endpoint. 3. **Select Data Fields**: Check fields to include: email, name, handle, trigger. 4. **Generate JSON Payload**: Copy the formatted JSON schema or cURL command in 1 click. ## Key Benefits - Valid JSON Schema Formatting - 1-Click Code Copy to Clipboard - Supports All Major ESP Platforms - Includes cURL Test Terminal Commands --- URL: https://cacto.cc/tools/social/klaviyo-dm-webhook-builder