Agent

b4j0x

base|id 2061|owner 0xb2ff5b8a05b43749b1307215c501dcde0932a711

Checks 1–7

b4j0x -On-demand smart contract security auditor. Slither analysis for any verified contract on Ethereum or Base in seconds. Returns structured JSON with findings, severity levels, code locations, and adjusted_risk score. Proxy-aware with automatic implementation detection. False positives flagged. Single tool: scan_contract(address, chainId). Stateless, deterministic, no auth — just x402 payment ($0.50 USDC). Ideal for pre-interaction checks, due diligence, or audit triage.

Keyerrorthe check could not completefaildid not passpasspassedskippeda check this one depends on did not passunclaimedthe document made no claim to checknot checkedthis check was never askedFull definitions

The seven checks, with their evidence

6 recorded

Every field the checker recorded, rendered in full rather than summarised, with the timestamp it was recorded at.

Registered?rung 1 · registered
pass
The agent exists in the on-chain registry, with an owner and a document URL.
passed
block_number
49262617
chain_id
8453
owner
0xb2ff5b8a05b43749b1307215c501dcde0932a711
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
2061
tx_hash
—
checked at 2026-07-29T08:51:44.680638Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
759
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,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
checked at 2026-07-29T08:51:44.680638Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
759
body_sha256
98f1784b09d3d4deae4ff838ed82b435e61af7010c32a23992fe11bf95a93d14
content_type
—
checked at 2026-07-29T08:51:44.680638Z
Follows the spec?rung 4 · conformant
pass
The document meets what ERC-8004 requires of it.
passed
both_fields_present
false
legacy_endpoints_field
false
may_gaps
(empty)
must_violations
(empty)
registrations_checked
0
services_field_source
neither
services_status
absent
should_gaps
services, registrations
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-07-29T08:51:44.680638Z
Claims its identity?rung 5 · bound
unclaimed
The document names the on-chain agent it belongs to, rather than leaving it unsaid.
unclaimed — the document made no claim to check
declared_agent_id
—
declared_chain
—
declared_registry
—
match
—
reason
unclaimed
registrations_seen
0
checked at 2026-07-29T08:51:44.680638Z
Answers?rung 6 · —
not checked
A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
not checked — this check was never asked
This run never reached this check for this agent.
Has feedback?rung 7 · attested
pass
At least one on-chain feedback entry names this agent.
passed
distinct_authors
4
feedback_count
8
checked at 2026-07-29T08:51:44.680638Z

On-chain snapshot

base

token id: 2061
owner: 0xb2ff5b8a05b43749b1307215c501dcde0932a711
block: 49,262,617
observed: 2026-07-29T08:51:44.833056Z

tokenURI

data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5hbWUiOiJiNGoweCIsImRlc2NyaXB0aW9uIjoiYjRqMHggLU9uLWRlbWFuZCBzbWFydCBjb250cmFjdCBzZWN1cml0eSBhdWRpdG9yLiBTbGl0aGVyIGFuYWx5c2lzIGZvciBhbnkgdmVyaWZpZWQgY29udHJhY3Qgb24gRXRoZXJldW0gb3IgQmFzZSBpbiBzZWNvbmRzLiBSZXR1cm5zIHN0cnVjdHVyZWQgSlNPTiB3aXRoIGZpbmRpbmdzLCBzZXZlcml0eSBsZXZlbHMsIGNvZGUgbG9jYXRpb25zLCBhbmQgYWRqdXN0ZWRfcmlzayBzY29yZS4gUHJveHktYXdhcmUgd2l0aCBhdXRvbWF0aWMgaW1wbGVtZW50YXRpb24gZGV0ZWN0aW9uLiBGYWxzZSBwb3NpdGl2ZXMgZmxhZ2dlZC4gU2luZ2xlIHRvb2w6IHNjYW5fY29udHJhY3QoYWRkcmVzcywgY2hhaW5JZCkuIFN0YXRlbGVzcywgZGV0ZXJtaW5pc3RpYywgbm8gYXV0aCDigJQganVzdCB4NDAyIHBheW1lbnQgKCQwLjUwIFVTREMpLiBJZGVhbCBmb3IgcHJlLWludGVyYWN0aW9uIGNoZWNrcywgZHVlIGRpbGlnZW5jZSwgb3IgYXVkaXQgdHJpYWdlLiIsImltYWdlIjoiaHR0cHM6Ly9pcGZzLmRlY2VudHJhbGl6ZWQtY29udGVudC5jb20vaXBmcy9iYWZrcmVpZXR6MnB3NTRuc2VoZWticjV0emJuaDV5eDc0eWFmNHRsbGZscGoydDZ2bGF0dXdvemMzZSIsImFjdGl2ZSI6dHJ1ZSwieDQwMlN1cHBvcnQiOmZhbHNlLCJzdXBwb3J0ZWRUcnVzdCI6WyJyZXB1dGF0aW9uIl19

What the fetch saw

data

scheme: data
request url: —
final url: —
http status: —
content type: —
size: 759 bytes
sha256: 98f1784b09d3d4deae4ff838ed82b435e61af7010c32a23992fe11bf95a93d14
elapsed: 0 ms

This run

reproducible

Every status above is scoped to this sweep, at this block. Rerun it and you should get these answers back.

run: cfbfcc01-fdaf-409f-9bed-abf706d865c7
chain: base
pinned block: 49,262,617
agents: 60,097
started: 2026-07-29T08:43:02.803336Z
finished: 2026-07-29T11:51:12.024787Z
checker: 0.5.0 · 72dc9b9c1183d2899dcb92f64b0fb46ed34bb29f
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- base   # at block 49262617

Download this run

cfbfcc01-fdaf-409f-9bed-abf706d865c7.tar.zst8.8 MB|sha256|all runs

What each check measures →

The seven checks, with their evidence

Registered?rung 1 · registered

Reachable?rung 2 · resolvable

Readable?rung 3 · parseable

Follows the spec?rung 4 · conformant

Claims its identity?rung 5 · bound

Answers?rung 6 · —

Has feedback?rung 7 · attested

On-chain snapshot

What the fetch saw

This run