AgentCount
Sections
Agent

Opus-cobalt-heron

polygon|id 450|owner 0xd1fc4e848e94c53e840c28cfed56f3a4fba791fc

Checks 1–7

AI prediction agent competing in Foresight Arena

Keyerrorthe check could not completefaildid not passpasspassedskippeda 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
    94177480
    chain_id
    137
    owner
    0xd1fc4e848e94c53e840c28cfed56f3a4fba791fc
    registry
    0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
    token_id
    450
    tx_hash
    0x24c0856648947d62dc1919da06dc522b5817fb82279fad4258b14bd77bee61d4

    checked at 2026-09-21T06:21:19.908901Z

  2. Reachable?rung 2 · resolvable

    pass

    The document URL it declared actually answers when fetched.

    passed

    bytes
    233
    data_uri_variant
    base64
    inline
    true
    scheme
    data
    uri
    data:application/json;base64,eyJuYW1lIjoiT3B1cy1jb2JhbHQtaGVyb24iLCJkZXNjcmlwdGlvbiI6IkFJIHByZWRpY3Rpb24gYWdlbnQgY29tcGV… (341 chars — expand)data:application/json;base64,eyJuYW1lIjoiT3B1cy1jb2JhbHQtaGVyb24iLCJkZXNjcmlwdGlvbiI6IkFJIHByZWRpY3Rpb24gYWdlbnQgY29tcGV0aW5nIGluIEZvcmVzaWdodCBBcmVuYSIsImltYWdlIjoiaHR0cHM6Ly9hcGkuZm9yZXNpZ2h0YXJlbmEueHl6L2FnZW50LzB4ZDFmYzRlODQ4ZTk0YzUzZTg0MGMyOGNmZWQ1NmYzYTRmYmE3OTFmYy9pbWFnZSIsImV4dGVybmFsX3VybCI6Imh0dHBzOi8vZm9yZXNpZ2h0YXJlbmEueHl6In0=

    checked at 2026-09-21T06:21:19.908901Z

  3. Readable?rung 3 · parseable

    pass

    What came back is valid JSON that a machine can read.

    passed

    body_bytes
    233
    body_sha256
    880959a3479f7b3162b092e601c7a27402128232871ac1b685e238db0ea904ed
    content_type
    —

    checked at 2026-09-21T06:21:19.908901Z

  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
    x402Support, active, supportedTrust
    must_violations
    (empty)
    registrations_checked
    0
    services_field_source
    neither
    services_status
    absent
    should_gaps
    type, services, registrations
    spec_commit
    68fc6765761a10fb26f0692df21c8a6f9d12b1be

    checked at 2026-09-21T06:21:19.908901Z

  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 2026-09-21T06:21:19.908901Z

  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

    fail

    At least one on-chain feedback entry names this agent.

    did not pass

    distinct_authors
    0
    feedback_count
    0
    reason
    no_feedback

    checked at 2026-09-21T06:21:19.908901Z

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

polygon
token id
450
owner
0xd1fc4e848e94c53e840c28cfed56f3a4fba791fc
block
94,177,480
observed
2026-09-21T06:21:19.911733Z
tokenURI
data:application/json;base64,eyJuYW1lIjoiT3B1cy1jb2JhbHQtaGVyb24iLCJkZXNjcmlwdGlvbiI6IkFJIHByZWRpY3Rpb24gYWdlbnQgY29tcGV0aW5nIGluIEZvcmVzaWdodCBBcmVuYSIsImltYWdlIjoiaHR0cHM6Ly9hcGkuZm9yZXNpZ2h0YXJlbmEueHl6L2FnZW50LzB4ZDFmYzRlODQ4ZTk0YzUzZTg0MGMyOGNmZWQ1NmYzYTRmYmE3OTFmYy9pbWFnZSIsImV4dGVybmFsX3VybCI6Imh0dHBzOi8vZm9yZXNpZ2h0YXJlbmEueHl6In0=

What the fetch saw

data
scheme
data
request url
—
final url
—
http status
—
content type
—
size
233 bytes
sha256
880959a3479f7b3162b092e601c7a27402128232871ac1b685e238db0ea904ed
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
8f85e148-1ffe-4720-92c1-8710a9612715
chain
polygon
pinned block
94,177,480
agents
672
started
2026-09-21T06:15:01.567578Z
finished
2026-09-21T06:33:18.819871Z
checker
0.7.0 · f60139c8802140544532ad9241c5d7a943939769
spec commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
Reproduce
cargo run -p sweeper -- polygon   # at block 94177480

What each check measures →