Building MailSink: a temp email API with MCP server on Cloudflare Workers

📰 Dev.to · heocoi

Learn to build a temporary email API using MailSink and MCP server on Cloudflare Workers to simplify email flow testing in CI

intermediate Published 22 Apr 2026
Action Steps
  1. Build a MailSink API using Cloudflare Workers to handle temporary email addresses
  2. Configure an MCP server to manage email protocols and routing
  3. Test email flows in CI using the MailSink API to verify functionality
  4. Deploy the MailSink API to Cloudflare Workers for scalable and secure email testing
  5. Compare the cost and efficiency of MailSink with existing solutions like MailSlurp
Who Needs to Know This

Developers and DevOps engineers can benefit from this solution to streamline their email testing workflows, reducing the pain and cost associated with existing services like MailSlurp

Key Insight

💡 MailSink provides a cost-effective and efficient solution for testing email flows in CI, leveraging Cloudflare Workers and MCP server

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🚀 Simplify email flow testing in CI with MailSink, a temp email API on Cloudflare Workers! 📧

Key Takeaways

Learn to build a temporary email API using MailSink and MCP server on Cloudflare Workers to simplify email flow testing in CI

Full Article

The problem Testing email flows in CI has been painful for years. MailSlurp is $79/mo,...
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