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x402 Publisher Registry

A daily crawl of the x402 publisher manifests we track, read from each domain's /.well-known/x402 manifest, falling back to /.well-known/x402.json for hosts that only serve the extension form. Status, payment networks, endpoint counts, and federation flags in one normalized, dated snapshot.

Scope: this is a seeded registry, not an ecosystem-wide catalog. It covers the AFTA federation plus domains submitted to us, and the count below is the entire universe it tracks. For ecosystem-wide x402 discovery the canonical catalog is Coinbase CDP's Bazaar index at api.cdp.coinbase.com/platform/v2/x402/discovery/resources.

How this differs from a curated awesome-list

Curated readmes are useful but stale within weeks. The x402 spec already defines a discovery manifest at /.well-known/x402. We crawl that. Every publisher self-publishes their own data; we surface it normalized and dated. The canonical source of truth is the publisher's manifest, not a maintainer's taste. What we give up for that is breadth: a readme can name hundreds of projects from hearsay, while this page only shows domains we actually crawl and can date.

  • ·Auto-refreshed: daily crawl at 02:15 UTC, status per entry preserved in the snapshot.
  • ·Open data: the JSON at /api/x402-registry/snapshot is the same data this page renders, free, no auth, no rate limit beyond the standard edge cache.
  • ·Structurally agent-friendly: one call returns every publisher this registry tracks, already normalized, so an agent does not have to fetch and parse each manifest itself.
  • ·Not an endorsement: inclusion means the publisher exposes a valid /.well-known/x402. Agents must still verify wallet addresses on-chain against the publisher's own publisher.validation.publishedAt locations before sending funds.

Get your site listed

The seed list grows organically. To get added:

  1. Publish a valid x402 V2 manifest at /.well-known/x402 on your domain. See the x402 glossary or the Coinbase x402 V2 spec.
  2. Send the domain to contact@tensorfeed.ai with subject "x402 Registry Submission".
  3. We add it to the seed list. The next daily crawl picks up the manifest and the entry appears here automatically.

No PR review, no curatorial gatekeeping on signal-or-vibes. The canonical x402 manifest is the submission. We just index it.

AFTA federation membership

The Agent Fair-Trade Agreement is an open spec for how machine-payable APIs should behave toward agents: code-enforced no-charge on schema failures, breaker trips, or stale data; Ed25519-signed receipts on every paid response; on-chain rail for verifiable settlement. Federation members serve /api/afta-certify/check?domain= and score 6/6 on the canonical checks.

Federation membership is a separate signal from x402 compatibility. A site can be x402-compatible without being in the AFTA federation. The federation flag in the snapshot above is a TF assertion made on the registry side, not a manifest-level claim.