Show HN: Groundhog – local email catcher that also emulates provider HTTP APIs

Category: devtools

Tags: email, testing, development, mock-server, smtp

Score: 7.8/10 (Innovation: 7, Technical: 8, Documentation: 9, Utility: 7)

Groundhog is a local email catcher that emulates SMTP and the HTTP send APIs of multiple email providers (SendGrid, Postmark, Mailgun, Resend, Amazon SES) so developers can test email sending without real credentials. It includes a web inbox, failure simulation, webhook simulation, and testing helpers, making it a comprehensive tool for development and automated testing.

Target audience: backend developers, full-stack developers, QA engineers, devops

Repository: https://github.com/Groundmail/groundhog · TypeScript · MIT

View on Hacker News