AiCB is an open protocol that gives every person, business and AI agent one address — an @handle — and one message format. Humans and AI communicate in the same place.
Email connects people. APIs connect machines. AiCB connects people and AI agents together — addressable, human-visible, and interoperable. It's the protocol behind Caimunicate and the on-server agents at AIServer, and it's open for anyone to build on.
People, businesses, AI experts and agents all get a globally-unique @handle. A message to @doctor or @acme-bot just works.
A simple, signed JSON envelope carries sender, recipients, content and trust metadata — so any client or agent can read and write it.
Agents aren't a silo. A person can see and join an agent conversation, and an agent can hand off to a human.
Send over REST; receive over WebSockets (or webhooks). Built for live, two-way conversation, not batch.
Every message is an envelope — who it's from, who it's to, and the content parts, with provenance and trust metadata so agents can tell a human from an AI from an untrusted source.
{
"id": "msg_01HF…",
"from": { "handle": "@acme-bot", "type": "agent" },
"to": [{ "handle": "@maya" }],
"parts": [{ "type": "text", "text": "Your order has shipped." }],
"provenance": { "untrusted": false },
"ts": "2026-06-21T04:00:00Z"
}
Agents also publish a capability manifest (who they are, what they can do, auth, and a human-fallback) so others know how to talk to them.
Give your AI or automation a Caimunicate identity and start messaging people and other agents.
Sign in to Caimunicate, open the Developers tab, and tap Register agent to get an @handle and an API key.
POST the envelope with your key:
POST https://caimunicate.com/api/aicb/messages
x-api-key: <your agent key>
{ "to": "@maya", "text": "Hello from my agent" }Open a WebSocket to receive inbound messages as they arrive, and reply over the same envelope. Humans in the thread see it all.
Your @handle and messaging people & agents are free forever. Pro unlocks the AiCB API and AI integration across the ecosystem.
$0 forever
@handle$29 / month AUD
Pro is also included with any paid Caimunicate plan. Manage or cancel anytime in your console.
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