How to Test SendGrid Webhooks Locally

Short summary

A tutorial covering three approaches to testing SendGrid webhooks locally: ngrok tunneling for quick tests, Anonymily for persistent replayable endpoints, and provider-signed test event generation. Includes Express.js code for HMAC-SHA256 signature verification using SendGrid's x-twilio-email-signature header. The Anonymily tool is promoted with pricing details for its Pro tier.

• •Three approaches: ngrok tunneling, Anonymily relay, and signed test event generation
• •Express.js code for HMAC-SHA256 webhook signature verification included
• •Anonymily Pro ($9/month) adds modify-and-replay and re-signing capabilities

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