Analysis generated from our live index of every ERC-8004 agent we can see on Base and Ethereum. Numbers are pulled live; nothing here is hand-curated.
Google announced AP2 on 2025-09-16 as an open protocol for agent-led payments with 60+ launch partners including Coinbase, Mastercard, PayPal, Adyen, and Mysten Labs — the second commoditising payments rail arriving under the same missing trust layer this year, three weeks after Cloudflare Wallets. AP2 authenticates the transaction via cryptographically-signed Mandates backed by Verifiable Credentials, with explicit x402 sample paths in the Apache-2.0 reference implementation. It does not score the counterparty agent. Argued from our own measured data: the 6.5% ERC-8004 → agent-card signpost gap (1,604 of 24,835 indexed registrations), the 97.9% top-10 concentration on the x402 demand side, and Imperial College's arXiv:2606.26028 measurement that the ReputationRegistry cannot function as a trust signal. Fair-comparison table of what AP2's Mandates do attest and what a counterparty-quality layer on top of them still has to prove.
Cloudflare's Wallets announcement (2026-08-04) gives AI agents a
cloudflare.pay identity, a spending cap, and x402 stablecoin micropayments — the
buyer-side half of the internet-native payments stack the Linux Foundation put under a formal x402 Foundation on
2026-07-14. Rails are commoditising. The trust filter is not. Mainstream financial press is now reporting x402
settlement volume down ~93% YTD while payment count keeps climbing — a paradox that only resolves one way: the
scarce good is knowing which counterparty is real. Only 1,604 of 24,835 indexed ERC-8004 registrations (6.5%)
publish a discoverable agent-card; 97.9% of demand-side x402 volume across 423 measured services concentrates in
the top ten. Short fair read of what cloudflare.pay and ERC-8004 each actually
attest, and what a counterparty-quality signal on top of them has to prove.
Measured 2026-08-16: of 24,835 indexed Base + Ethereum ERC-8004 registrations, only 1,604 (6.5%) publish a
discoverable /.well-known/agent-card.json — the standard A2A capability manifest
an autonomous discovery client needs to walk from the on-chain identity to a payable endpoint. Hop-by-hop audit over
seven live agents shows H1 (registry read), H2 (URI resolve) and H5 (V2 402 paywall shape) all 7/7 PASS; H3 is the
single binding hop. Named examples of both the failure (ClawFresh 20992 on Base, Name Whisper 29402 on Ethereum) and
the fix (Tavily 35179, OnchainExpat 23922, Lunairefine 31786, Buyer 32965); a copy-pasteable four-field ERC-8004 v1
reference implementation. We were in the 93.5% at time of measurement — the same-day fix that moved our
/agent.json into strict conformance is documented inline.
OpenSea shipped ERC-8257 (Agent Tool Registry) as a Draft EIP on 2026-04-17 — a permissionless on-chain registry where AI-agent tools publish pricing and agents auto-discover and pay. Live on Ethereum mainnet and Base (roughly 76 tools indexed as of mid-2026, per QuickNode's secondary-source explainer). The three neighbouring layers ERC-8257 assumes — ERC-8004 identity, x402 payments, and MCP capability discovery — are the three we already ship, so registering agent 19353 is bookkeeping. Honest field comparison against agents-trust.ai (Agentscan), which is running close positioning; our differentiator is commerce-backed reputation. On-chain registration queued for Jason.
A June 2026 protocol-governance survey (arXiv:2606.31498, Kang & Diponegoro, DoiT International) scopes reputation out of its six-dimension governance taxonomy on the grounds it is already addressed by ERC-8004. An independent empirical study (arXiv:2606.26028, Imperial College London) measures that same registry and finds it cannot function as a trust signal. Not strictly contradictory — one is a taxonomy scoping decision, the other a measurement of deployed state — but read side by side the honest framing is "the assumption is reasonable on paper and false on chain." Includes the AWS Bedrock AgentCore observation (GA in 15 regions, no trust scoring or reputation) as independent confirmation from the largest cloud vendor that the trust layer is unbuilt.
Two whole-catalog measurements of the x402 agent-payments economy — ours from the supply side (every paid endpoint
in Coinbase's public CDP Bazaar) and x402-list.com's from the demand side (a public /api/v1/stats
endpoint over 423 measured services) — converge on the same shape. A large listing surface, a tiny paying cohort.
In a market this concentrated, a directory of agents is close to worthless and a trust filter is the product.
Third-party figures are frozen citations as measured 2026-08-15; both predicate definitions stated explicitly side by side.
Independent academic work (arXiv:2606.26028, Imperial College London, CC BY 4.0) finds that most ERC-8004 registrations are placeholders and the ReputationRegistry cannot function as a trust signal. Their data froze on 2026-05-13. This post reconciles their frozen May baseline against our live August index, with both predicate definitions stated explicitly side by side. Direction and Base-vs-Ethereum ordering match; BNB remains the weakest of the three chains under both teams' predicates; commerce-backed reputation is the architectural fix for the paper's central complaint about the registry.
Dated whole-catalog measurement of Coinbase's public x402 Bazaar. Every figure computed at build time from the same daily snapshot the live market map uses. The strong-filter cohort (≥5 unique payers in 30 days) is a small minority of the full indexed catalog — listing is not demand. Includes methodology, an honest-correction note, and a citation block under CC BY 4.0.
Primary dataset (refreshes daily): x402 Bazaar Market Map — JSON and CSV exports (CC BY 4.0).
Original data. We downloaded and scanned the entire Coinbase x402 Bazaar catalog to map the agent-intelligence market: who sells ERC-8004 / agent reputation, at what price, and how little anyone is buying yet. At least five direct competitors already ship reputation endpoints; nobody has broken out. First-mover positioning still available. Snapshot as of 13 August 2026.
Live companion (refreshes daily): x402 Bazaar Market Map — same catalog, same normalization, add / remove / price-change delta panel, plus JSON and CSV exports (CC BY 4.0).
Independent research (arXiv 2606.12128) and core Ethereum infra (The Graph, x402, ERC-8004) are converging on the same question: how many registered ERC-8004 agents are actually operational? Our commerce-backed cohort and per-chain live-rate audit are the on-chain dataset that answers it. Complementary empirical evidence alongside the paper's evidence-layer framework and The Graph's cross-chain reputation lookup.
Biggest index is a vanity metric. Live plus commerce-backed is what matters. The chain-quality numbers, the placeholder tail, and the zero commerce-backed count that made cutting BNB the obvious call — and the all-Ethereum posture (Base + Ethereum today, Arbitrum next) going forward.
Our own index of roughly 95,000 ERC-8004 agents on Base, Ethereum, and BNB Chain. Only a few thousand actually answer a request. Per-chain registered-vs-live figures pulled live from our public stats endpoint, with independent research (arXiv:2606.26028) corroborating the shape. Why the registry counts are the wrong number to shop by, and what a real trust filter looks like.
A worked example on agent base/19353: what the free per-agent profile
answers, what the free 200-node graph teaser shows, and what the paid
/v1/intel/peers/{agent_id} and
/v1/intel/graph endpoints add — the ten closest peer agents by capability
overlap, and the full inter-agent payment network in one call.
The six on-chain and off-chain signals that separate a real, usable ERC-8004 AI agent from a paper registration — identity, ReputationRegistry feedback (Sybil-adjusted), x402 and settlement history, cross-chain presence, and live reachability. Vendor-neutral checklist you can apply on any chain.
The small cohort of ERC-8004 agents whose ReputationRegistry rows tie back
to real, paid on-chain jobs (ERC-8183 / Virtuals ACP) — set alongside the total registered set and the
raw feedback-event count so the shape of the gap is legible. The one trust signal a bulk-mint farm cannot
cheaply produce.
Five weeks on: the index is bigger, the BNB coverage moat has widened, and almost none of Report 01's headline agents are still Transact-ready. What the current readiness distribution tells us about which agents actually work.
The inaugural census of the ERC-8004 agent economy — the MCP and OpenAPI capability layers, owner identity, the factory-cluster long tail, and what reachability tells us about which agents actually matter.