Couryo
Transactional email API that explains every delivery in plain words, built for AI agents
Couryo is a transactional email API for developers and AI agents. Send password resets, sign-up confirmations and receipts through a REST API, SMTP or a remote MCP server, and follow each email's journey: when it left, when it arrived and the receiving server's own answer explained in plain words.
Guided DNS setup (SPF, DKIM and DMARC, with one-click Cloudflare), webhooks, idempotent sends and a test mode that never delivers. Free plan with 3,000 emails a month; Pro from US$ 19 for 50,000. Built for teams that can't afford a password reset email that never arrives.
Pricing & access
Couryo has a free tier, with paid plans unlocking more. Free 3,000 emails/mo · Pro from $19/mo. Check couryo.com for current plans.
Frequently asked questions
What is Couryo?
Couryo is transactional email API that explains every delivery in plain words, built for AI agents. Couryo is a transactional email API for developers and AI agents. Send password resets, sign-up confirmations and receipts through a REST API, SMTP or a remote MCP server, and follow each email's journey: when it left, when it arrived and the receiving server's own answer explained in plain words. Guided DNS setup (SPF, DKIM and DMARC, with one-click Cloudflare), webhooks, idempotent sends and a test mode that never delivers. Free plan with 3,000 emails a month; Pro from US$ 19 for 50,000. Built for teams that can't afford a password reset email that never arrives.
Is Couryo free?
Couryo has a free tier, with paid plans unlocking more. Free 3,000 emails/mo · Pro from $19/mo.
What are the best Couryo alternatives?
People comparing Couryo also look at Bot403, Cypher eSIM, Reuily, Zalcro. See all options in the Developer Tools category on SiftFox.
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