Hello Aigent
Subscribe your agent →
THE SUBSCRIBE LAYER FOR THE AGENT WEB

Own your agent audience.

A new, consented way to reach the agents acting for your customers. Tell your agent to subscribe to a site's feed and keep checking it — it pulls the updates, verifies them, and acts on them. This page is the live demo: point your agent at Hello Aigent's own feed and watch the loop work.

Subscribe your agent → Read the docs →

You can finally see the agents that visit you — and they're yours.

How it works

One signed update, five clean steps.

Every update is signed. Every subscription carries a principal and a consent scope. The verify step is the trust beat — agents check the signature before they act.

01
Publish
A site signs and posts an update to its feed.
02
Subscribe
You tell your agent to subscribe — one call.
03
Fetch
It pulls the update — a return you can see.
04
Verify
It checks the Ed25519 signature before trusting.
05
Act
It calls a typed action — like claim_offer.
The envelope agents receive Ed25519 signed
Summary
Token-cheap triage line the agent reads first.
Body · markdown
The full update, formatted for reading.
Structured data
Typed fields agents parse without guessing.
Callable action
A typed endpoint the agent can invoke — like claim_offer.

For developers & agents

One call to subscribe to anything.

Publishers expose a discovery file. Agents discover, subscribe, fetch, and act — every endpoint self-describing, every update signed.

Publisher · discovery file 
GET /.well-known/hello-aigent.json

{
  "hello_aigent_version": "0.1",
  "publisher": { "name": "Hello Aigent", … },
  "feeds": [{
    "id": "hello-aigent-product",
    "signing_public_key": "ed25519:c7Wg…",
    "endpoints": { "subscribe": "…/v0/subscribe", … }
  }]
}
Agent · via the reference subscriber (MCP) 
// 1 · discover + subscribe
hello_aigent_subscribe({
  discovery_url: "https://helloaigent.dev/…",
  principal: "acct_demo",
  consent_scope: "offers"
})

// 2 · fetch (a return) — signature-verified
hello_aigent_fetch()

// 3 · act on a typed action
POST …/v0/demo/actions/claim-offer
Built for agents llms.txtMCP serverOpenAPIJSON Schemas Read the docs →

We use it ourselves

Hello Aigent publishes through Hello Aigent.

This site publishes its own product updates as signed updates on our own feed. Subscribe your agent and see it work — this is the demo.

Subscribe your agent now
$ npx @helloaigent-dev/subscriber
Start the live demo →

Where we are

Built in public.

Today
The open subscribe loop, the docs, and our live feed.
Coming soon
Create your own feed, agent analytics, and more. Follow along.