{"slug": "i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp", "title": "I built email infrastructure for AI agents: send, receive, parse, and reply over MCP", "summary": "Drin, a new email infrastructure startup, has launched agent-native email APIs that support send, receive, parse, and reply workflows for AI agents. The product provides a full inbox with features like inbound parsing, threads, webhooks, CLI, MCP, and sandbox testing, starting at $3/month for production use.", "body_md": "Most email APIs are built around one direction: your app sends a transactional email and a human reads it somewhere else.\n\nThat breaks down when the user is an AI agent.\n\nAgents often need the full loop:\n\nSo we built Drin: agent-native email infrastructure for developers and AI agents.\n\nThe goal is to give an app or agent a real inbox, not just a send endpoint.\n\nA few examples of workflows we are designing for:\n\nThe product supports send, receive, inbound parsing, threads, replies, webhooks, CLI, MCP, sandbox testing, and production domains.\n\nFree sandbox is live. Production starts at $3/month.\n\nSite: [https://drin.run/](https://drin.run/)\n\nDocs: [https://docs.drin.run/](https://docs.drin.run/)\n\nI am looking for feedback from people building AI agents, support tools, CRMs, devtools, or anything that needs programmable inbound email. If you have tried to build this with Resend, SendGrid, Mailgun, SES, Gmail, or Postmark, I would especially like to hear what broke first.", "url": "https://wpnews.pro/news/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp", "canonical_source": "https://dev.to/orbit_web_6390b435ea6ad2a/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp-7b9", "published_at": "2026-06-28 11:42:47+00:00", "updated_at": "2026-06-28 12:33:55.167614+00:00", "lang": "en", "topics": ["ai-agents", "developer-tools", "ai-infrastructure"], "entities": ["Drin", "Resend", "SendGrid", "Mailgun", "SES", "Gmail", "Postmark"], "alternates": {"html": "https://wpnews.pro/news/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp", "markdown": "https://wpnews.pro/news/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp.md", "text": "https://wpnews.pro/news/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp.txt", "jsonld": "https://wpnews.pro/news/i-built-email-infrastructure-for-ai-agents-send-receive-parse-and-reply-over-mcp.jsonld"}}