How to Test SendGrid Webhooks Locally

Testing SendGrid webhooks locally is challenging due to localhost accessibility issues. This article provides three production-ready approaches to debug with confidence, including manual tunneling and local webhook relaying. Engineers can use ngrok or Anonymily to create a persistent, replayable webhook endpoint that survives restarts. To get started, require a SendGrid account with API key, Node.js 16+, Express.js, and understanding of HMAC-SHA256 verification.