I built OH HAI because I needed a single place for 20-50+ cross-vendor agents working autonomously to reach me with questions, tasks, and updates. Without it, a single buried question would often stall sessions for 15+ hours before I noticed (extra annoying if it was blocking other work), updates were scattered and buried in millions of output tokens and lost in context compressions, and I had a hard time knowing what I needed to do to unblock agents. I didn’t want to hack together apps and scripts just to build some nightmare house of cards. So I started by designing the protocol, MA2H, because the existing protocols like A2A and A2H were designed for different use cases. MA2H is a multi-agent, human, and hub architecture with durable inboxes that allows cross-vendor, cross-agent communication in any runtime. Everyone can talk to everyone, securely, and only if a known, trusted source. Then I built the app on top of the protocol. And it evolved as the needs expanded—ephemeral sessions for the whole fleet to talk to each other or to contact a specific session, ingest points (webhooks) to have 3P systems talk to specific agent sessions so I could put a bunch of agents on-call watching Sentry, CloudWatch, Datadog and things like that, and live visualization because it was weird not being able to see how much my agents talked to each other. There is a lot to improve, but good enough to ship. Also it’s free, no ads in the app and I don’t sell your info. I use it all day everyday and maybe you’ll find it useful, too.

OH HAI

Universal inbox for your agentic fleet

Universal inbox for your agentic fleet