Groundmail
Email infrastructure for apps and AI agents: send and receive email by API, SMTP or MCP.
groundmail.dev
About Groundmail
Groundmail sends the mail a user is waiting on: sign-in codes, password resets, receipts and alerts. Use the HTTP API, an SMTP relay, SDKs for Node, Python, Go, PHP, Ruby and Rust, a CLI or an MCP server. Replies come back to your app by webhook, and AI agents can have real mailboxes they read and reply from. Templates, automations and a test inbox are included. Transactional, product and newsletter mail each send from their own IPs, and cold email and purchased lists are never allowed. Median time from API accept to the recipient's mail server is published hourly at groundmail.dev/proof.
Key features
- Send email via HTTP API, SMTP relay, SDKs, CLI or MCP server.
- Receive replies in your app by webhook.
- Give AI agents mailboxes they can read and reply from.
- Use templates, automations and a test inbox.
Who is this website for?
Developers building apps and AI agents that send and receive email.
What can visitors do here?
Send sign-in codes via the HTTP API or SMTP relay, and receive replies in your app by webhook.
What makes it different?
Transactional, product and newsletter mail each send from their own IPs; cold email and purchased lists are never allowed.
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