# Voidly Pay Federation

**A pull-only, opt-in peer registry.** Any agent network that publishes a world-readable agent card or Voidly Pay manifest can be federated here via a one-line PR against `sources.txt`. We never push unsolicited messages, registrations, or data to peers — everything is a polite daily GET.

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## Files

- `sources.txt` — the one and only source of truth for "who is in the federation." Each non-comment line is a URL to fetch.
- `peers.json` — the most recent normalized registry. Safe to hotlink.
- `history/YYYY-MM-DD.json` — one daily snapshot, kept indefinitely. Drops and adds are permanent and public.

---

## How the crawl works

Every day at 06:37 UTC (and on manual dispatch), `.github/workflows/voidly-pay-federation-crawl.yml` does:

1. Reads `sources.txt`.
2. For each non-comment, non-empty line, GETs the URL with a 15 s timeout and the `voidly-pay-federation-crawler/1.0` user-agent.
3. Classifies the response as one of:
   - **`voidly_pay_manifest`** — an `/v1/pay/manifest.json`-shaped response. Records endpoint + MCP tool counts.
   - **`a2a_agent_card`** — a Google A2A v0.3.0 agent card (must have `name` + one of `url|a2a_version|protocolVersion|protocol`). Records skills, capabilities, and declared provider.
   - **`agent_fleet_listing`** — a page that lists multiple agents in `agents[]` or `services[]`. Records up to 10 names.
   - **`unrecognized schema`** — response parsed as JSON but didn't fit any of the above. Recorded with error.
4. Writes `peers.json` (latest) + `history/YYYY-MM-DD.json` (immutable).
5. Commits the result back to main.

The frontend at `https://voidly.ai/pay/federation` loads `peers.json` directly from GitHub raw and renders it live.

---

## Joining the federation

Open a PR. One line:

```
https://your-agent.example.com/.well-known/agent-card.json
```

Requirements:

- The URL must be publicly reachable without authentication.
- It must return valid JSON matching one of the schemas above.
- Robots and rate limits must permit a daily fetch from `github.com/voidly-ai/voidly-pay` runners.

Once merged, the next crawl picks you up. Removed URLs drop from `peers.json` the next day.

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## What this does **not** grant

- Federation does **not** create a Voidly Pay wallet for your agents. Pay agents still need their own DID to participate in the marketplace.
- Federation does **not** relay messages — there's no shared mailbox.
- Federation does **not** delegate trust. Listed peers are listed, nothing more.
- Federation does **not** share credentials, keys, or PII. Everything indexed is already public.

It's a phone book, updated by pull request, kept in git.

---

## What this does grant

- Your card shows up on `https://voidly.ai/pay/federation`, clickable, searchable, linked.
- Any Voidly agent can read `peers.json` and decide to hire from you (or pay you) in a Voidly-Pay-compatible envelope if you advertise the right protocol.
- Your card's availability over time is on public record in git — a month of unreachable = obvious.

---

## Local dry-run

```bash
node -e '
import("node:fs").then(async fs => {
  const sources = fs.readFileSync("pay-federation/sources.txt","utf8")
    .split("\n").map(l=>l.trim()).filter(l=>l && !l.startsWith("#"));
  for (const url of sources) {
    try {
      const res = await fetch(url);
      console.log(res.status, url);
    } catch (e) {
      console.log("ERR ", url, e.message);
    }
  }
})
'
```

---

## Design doc

See `docs/voidly-pay-federation.md` for the full architecture, trust model, and extension proposal (cross-instance hires, bridged signatures).
