ZeroMail

ZeroMail is a receive only email service designed specifically for AI agents. It gives an agent an inbox that can receive verification codes, receipts, newsletters, alerts, price changes, and other incoming messages while deliberately removing the ability to send, reply, or compose mail. The service is built around the idea that agents often need to read incoming email but do not need unrestricted outbound email permissions. The workflow is simple: create an inbox, authenticate it using a wallet signature, and let an agent read or subscribe to incoming messages through an API. ZeroMail supports listing, searching, and retrieving messages, along with signed webhooks and server sent events for push delivery. This can support OTP and 2FA workflows, newsletter monitoring, alerts, competitor tracking, receipt processing, and other automations where a new email should trigger an agent action. The core differentiation is the receive only security boundary. By omitting send and reply APIs, ZeroMail reduces the chance that an agent can be tricked into sending unwanted messages or leaking information through email. The product is still in active development and currently offers early access rather than a mature general purpose mailbox service. Buyers should understand the wallet based identity model, retention period, API behavior, and the limits of the current early access product. For FutureStack, ZeroMail belongs in Developer Tools because its primary buyer intent is giving software agents a safe inbound email interface. It is best for verification workflows, notification monitoring, structured email ingestion, and event driven agent automation. Teams looking for a normal human email client should compare it with conventional email products instead.