AgentCount
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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 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

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.

  1. Registered?rung 1 · registered

    pass

    The agent exists in the on-chain registry, with an owner and a document URL.

    passed

    block_number
    51072140
    chain_id
    8453
    owner
    0xb2ff5b8a05b43749b1307215c501dcde0932a711
    registry
    0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
    token_id
    2061
    tx_hash
    0xb1fdd1669b780ae11a4844fa2ba414a43db20ab20d869de71d6a607475fe1d31

    checked at 2026-09-09T06:33:01.445027Z

  2. 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,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (1,041 chars — expand)data:application/json;base64,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

    checked at 2026-09-09T06:33:01.445027Z

  3. 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 2026-09-09T06:33:01.445027Z

  4. 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 2026-09-09T06:33:01.445027Z

  5. 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 2026-09-09T06:33:01.445027Z

  6. 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.

  7. 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 2026-09-09T06:33:01.445027Z

Check it again, now

outside the census
Everything above is one sweep, pinned to one block. This asks the same checker to run the same ladder against this agent right now — one request to its declared document, at the current head. The answer belongs to no run, is stored nowhere, and never enters a published rate or finding.
Sends one request to the agent’s own server. Rate limited.

On-chain snapshot

base
token id
2061
owner
0xb2ff5b8a05b43749b1307215c501dcde0932a711
block
51,072,140
observed
2026-09-09T06:33:01.446898Z
tokenURI
data:application/json;base64,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

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
794d7afd-90ab-4c17-90c9-57f8b48e7a3d
chain
base
pinned block
51,072,140
agents
85,673
started
2026-09-09T06:00:28.568294Z
finished
2026-09-16T08:47:01.599361Z
checker
0.7.0 · 981910a8f7451ff11d8af05abef0cc7852e25953
spec commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
Reproduce
cargo run -p sweeper -- base   # at block 51072140

What each check measures →