AI product Open source
Sentio is an email inbox API and multi-tenant mail server for AI agents, developed by Truespar. It gives each agent a real email address, authenticates and scans inbound SMTP mail, scores and routes it, then delivers the message as a structured webhook; agents send threaded replies through a REST API, which signs outbound mail with DKIM, queues it, and delivers it over SMTP. Tenant isolation covers domains, mailboxes, API keys, rate limits, suppression lists, sending reputation, and spam profiles. The Rust service implements inbound and outbound mail infrastructure including DKIM, SPF, DMARC, ARC, MTA-STS, DANE, and three-tier anti-spam, and includes an MCP server for exposing email as native agent tools. The repository provides Docker deployment with PostgreSQL, Redis, NATS/JetStream, MinIO, ClamAV, and rspamd, plus an API reference and testing UI.
1 use taken from transcripts — each links to the moment in the video.
A service that gives AI agents authenticated mailboxes, turning incoming email into structured events and supporting threaded replies. It also provides tenant isolation for domains, keys, rate limits, suppressions, and reputation.
1 in the library.