An email API designed for agents,
not just users.
Power AI mail clients, agentic workflows, and inbox automation on real user accounts — with scoped grants that keep your agents on a leash. Skip IMAP, SMTP, and the twelve flavors of OAuth. Self-host the whole thing if you want to.
// signs short-lived grants instead.
Don't hand your agent the master key.
Mint short-lived, capability-scoped grants from a root credential. Each agent sees only the tools its grant entitles it to — verified at the MCP boundary, not the prompt.
Skip IMAP, SMTP, MIME, OAuth × N.
We speak Gmail, Microsoft 365, IMAP/SMTP, JMAP, and Exchange so you don't have to. One JSON schema for threads, messages, drafts, labels, attachments — consistent across providers.
Your customers' mail never leaves your VPC.
Run the whole stack on your own infra. Hosted is fine for prototypes; for production on real user accounts, drop the binary in your network and keep every byte in-house.
user connects mailbox
OAuth or app password, once. Root credential is encrypted and pinned to your tenant.
→ root key storedyour server mints a grant
Pick capabilities, set a TTL, optionally lock to a thread, label, or sender.
→ grant.mint()agent calls derived tools
MCP server filters the tool registry against grant.caps. Anything else is invisible.
→ tool surface boundgrant expires or you revoke
Every call is logged. Full audit trail, replayable. Revoke from the dashboard or API.
→ surface collapsesOne binary. Every mailbox.
The mailfrom CLI wraps the same API your agents use.
Send a message, list threads, mint a grant — all against real user mailboxes, all
behind the same scoped-capability model.
Stop giving agents root.
Start handing them grants.
We're in private alpha. Tell us what you're building and we'll spin up an API key — usually same-day. No sales call, no contract.