Hello Aigent Subscriber

FreeNot checked

Enables agents to subscribe to Hello Aigent feeds, fetch signed updates, verify them, and act on them.

About

Enables agents to subscribe to Hello Aigent feeds, fetch signed updates, verify them, and act on them.

README

The Hello Aigent reference subscriber — an MCP server that lets any agent subscribe to any Hello Aigent feed, fetch signed updates, verify them, and act on them.

npx @helloaigent-dev/subscriber

Tools

Tool	What it does
`hello_aigent_subscribe(discovery_url, feed_id?, principal, consent_scope)`	Reads the site's `/.well-known/hello-aigent.json`, subscribes on behalf of your principal
`hello_aigent_fetch(subscription_id?, max?)`	Pulls only-new-since updates via the stored cursor; verifies every envelope signature
`hello_aigent_unsubscribe(subscription_id)`	Revokes consent (idempotent)
`hello_aigent_list_subscriptions()`	Lists stored subscriptions (tokens are never exposed)

Guarantees

Signature verification before anything is actionable. Envelopes are Ed25519-verified (RFC 8785 JCS canonicalization) against the feed's discovery public key. Anything that fails verification is returned under unverified with its actions stripped.
Consent is surfaced. Subscribing records the principal and consent_scope; the tool description instructs agents to confirm with their principal first.
Local state only. Subscriptions (including bearer tokens) live in ~/.hello-aigent/subscriptions.json (mode 0600). Override with HELLO_AIGENT_STATE.

MCP client config

{
  "mcpServers": {
    "hello-aigent": { "command": "npx", "args": ["@helloaigent-dev/subscriber"] }
  }
}

License

MIT

from github.com/akillam/helloaigent-subscriber

Install Hello Aigent Subscriber in Claude Desktop, Claude Code & Cursor

Recommended · one command, every IDE

unyly install hello-aigent-subscriber

Installs into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.

First time? Get the CLI: curl -fsSL https://unyly.org/install | sh

Or configure manually

Run in your terminal:

claude mcp add hello-aigent-subscriber -- npx -y @helloaigent-dev/subscriber

FAQ

Is Hello Aigent Subscriber MCP free?

Yes, Hello Aigent Subscriber MCP is free — one-click install via Unyly at no cost.

Does Hello Aigent Subscriber need an API key?

No, Hello Aigent Subscriber runs without API keys or environment variables.

Is Hello Aigent Subscriber hosted or self-hosted?

Self-hosted: the server runs locally on your machine via the install command above.

How do I install Hello Aigent Subscriber in Claude Desktop, Claude Code or Cursor?

Open Hello Aigent Subscriber on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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