Instrument 01 · Registry checklive

We check every AI agent registered under ERC-8004.

485,257 agents·BNB Chain, Base, Ethereum mainnet + 8 more·provenance ↓

Registration counts get cited as proof that an agent economy exists. Nobody was checking what stands behind them. We ask seven checkable questions of every registered agent and publish each answer with the evidence behind it.

Findings for

56.4%

of valid registration documents declare no way to reach the agent — no services entry at all, or one with nothing in it.

217,919 / 386,695 documents that parsed and reached check 4 (Follows the spec?)

67.6%

of registration files never say which on-chain agent they belong to — the spec only recommends the field that would bind them. Check 5 (Claims its identity?) records those as unclaimed: neither a pass nor a fail.

260,543 / 385,426 documents that passed check 4 (Follows the spec?) (conformant)

9.8%

have at least one on-chain feedback entry. Agents with feedback are less likely to have a document that resolves than agents with none — 59.1% against 83.0%. A sampled read traces most of Base’s feedback to a handful of client addresses.

47,320 / 485,257 agents in these 11 runs

—

Whether money reaches a registered agent is read from token transfer logs rather than from the registry, so it is not one of the seven checks and no sweep reports it. What the join asks, and what it is read against.

369,130 agents · outside the seven checks

Has feedback? by chainbsc 1.4%base 43.7%mainnet 3.3%billions 0.6%megaeth 0.0%xlayer 12.0%celo 79.3%gnosis 50.6%arbitrum 6.2%polygon 24.6%op 2.8%— one population-weighted average would hide this spread, so the sections below show one chain at a time

Read the full report: 4 chains, 369,130 agents →

Changed since the last sweep

each chain · against its previous sweep

Each row compares a chain’s current sweep against the previous one — both pinned to a block, so the comparison itself recomputes. “No longer reachable” is check 2 (Reachable?) moving from pass to not-pass: the quiet decay that registration counts never show.

Chain	New	No longer reachable	Reachable again	Declined †	Errored §
BNB Chain	31,213	88	1	765	393
Base	4,119	5	2	1,002	4,240
Ethereum mainnet	337	1	0	70	86
Billions	0	0	0	0	0
MegaETH	0	0	0	0	0
X Layer	176	0	0	0	3
Celo	4	0	0	0	58
Gnosis	2	0	0	0	2
Arbitrum	78	0	0	0	95
Polygon	19	0	0	0	5
OP Mainnet	5	7	0	0	3

† Check 2 (Reachable?) transitions where the origin declined the probe — a rate limit, an auth or payment challenge, a robots.txt that said no. Excluded from both reachability columns by rule: being declined is not the agent having gone away, and getting through after being declined is not the agent having come back.

§ Check 2 transitions where this census’s own probe failed — a timeout, a TLS or DNS failure. Excluded from both reachability columns by the same rule: our failure is never the agent’s, and a checker-side outage must not read as agents going dark.

Every check, every status

base rates on bsc

Population counts, not a score for any one agent. A check’s segments do not sum to the whole population when an earlier failure stopped the pipeline — that gap is drawn as its own “not checked” segment rather than folded into whichever status happens to render widest.

Registered?

registered · 300,552

✓: pass; 300,552; 100.0%

Reachable?

resolvable · 300,552

✓: pass; 284,198; 94.6%
✗: fail; 15,298; 5.1%
•: refused; 813; 0.3%
!: error; 243; 0.1%

Counts documents stored on-chain, which resolve by construction — this is not a server-uptime rate.

Readable?

parseable · 300,552

✓: pass; 283,389; 94.3%
–: skipped; 16,354; 5.4%
✗: fail; 808; 0.3%
!: error; 1; 0.0%

Follows the spec?

conformant · 300,552

✓: pass; 282,748; 94.1%
–: skipped; 17,163; 5.7%
✗: fail; 641; 0.2%

Claims its identity?

bound · 300,552

○: unclaimed; 178,591; 59.4%
✓: pass; 103,373; 34.4%
–: skipped; 17,804; 5.9%
✗: fail; 784; 0.3%

Answers?

live · 300,552

·: not checked; 258,919; 86.1%
–: skipped; 17,804; 5.9%
✗: fail; 16,019; 5.3%
✓: pass; 6,304; 2.1%
⌀: unprobeable; 1,479; 0.5%
•: refused; 26; 0.0%
!: error; 1; 0.0%

Something answered — not that it works, speaks any protocol, or is the agent.

Has feedback?

attested · 300,552

✗: fail; 296,208; 98.6%
✓: pass; 4,344; 1.4%

Someone left feedback — not that they were independent of the agent.

Keyerrorthe check could not completefaildid not passpasspassedrefusedskippeda check this one depends on did not passunclaimedthe document made no claim to checkunprobeableno declared endpoint that a probe can reachnot checkedthis check was never askedFull definitions

One agent, seven checks

first three on bsc

Exactly as the directory renders them. Hover or tap any badge for the question it answers. A check with no row was never reached this run — check 6 (Answers?) is not yet implemented, so it reads as not checked for everyone, never as a failure.

Agent	Owner	Checks 1–7
dAi#0	0x8ce2…fdec
ClawNews#1	0x89e9…5029
Agent #2	0x6446…d161

Search all 485,257 agents →Agents that passed every check →

Provenance

reproducible

Every number on this page comes from one sweep per chain, pinned to one block each. A result you cannot recompute is an opinion; this is what recomputes it.

The completed sweep behind each chain in the figures above
chain	agents	pinned block	run
BNB Chainbsc	300,552	117,948,134	103c16ca
Basebase	67,951	50,394,649	7a7a7b4f
Ethereum mainnetmainnet	50,419	25,824,613	49418208
Billionsbillions	25,976	6,914,383	b05a52b0
MegaETHmegaeth	12,727	24,764,978	cf17b7fa
X Layerxlayer	11,179	68,788,163	3a8fe94e
Celocelo	9,779	75,653,978	12505271
Gnosisgnosis	4,115	47,885,839	89fedbd0
Arbitrumarbitrum	1,387	497,799,172	3090d96c
Polygonpolygon	630	92,564,272	a762a0e3
OP Mainnetop	542	155,976,238	9c66651c

run: 103c16ca-6426-4f10-b9a0-5f8c5a8a2a30
chain: bsc
pinned block: 117,948,134
agents: 300,552
started: 2026-08-25T06:00:14.800071Z
finished: 2026-08-25T17:21:46.464932Z
checker: 0.7.0 · 9d5393c75e1c70208ad73f51dc4685b4e5f5c37d
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- bsc   # at block 117948134

How each check is measured →