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base|id 29935|owner 0x6ffa1e00509d8b625c2f061d7db07893b37199bc

Checks 1–7

TAG IT is the physical world primitive that agentic commerce has been missing. We cryptographically bind NFC chips to on-chain digital twins so AI agents can verify a real object exists, is authentic, and unmodified before spending a single wei. We are pioneering the first protocol that enables AI agents to autonomously purchase, verify, and take custody of physical assets on-chain. The missing trust layer between agents and physical reality.

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

7 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
    52281733
    chain_id
    8453
    owner
    0x6ffa1e00509d8b625c2f061d7db07893b37199bc
    registry
    0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
    token_id
    29935
    tx_hash
    0x2985cfc562c1205c78f9573eadf002cd84b27ecab4a319dc3f0969048e35e8c1

    checked at 2026-10-07T08:41:49.221572Z

  2. Reachable?rung 2 · resolvable

    pass

    The document URL it declared actually answers when fetched.

    passed

    bytes
    714
    data_uri_variant
    base64
    inline
    true
    scheme
    data
    uri
    data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (981 chars — expand)data:application/json;base64,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

    checked at 2026-10-07T08:41:49.221572Z

  3. Readable?rung 3 · parseable

    pass

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

    passed

    body_bytes
    714
    body_sha256
    022aacecf0891783fab5373855e36e97f2c70a81937d6bdd51397505167778f9
    content_type
    —

    checked at 2026-10-07T08:41:49.221572Z

  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
    must_violations
    (empty)
    registrations_checked
    1
    services_field_source
    services
    services_status
    empty
    should_gaps
    image, services_empty
    spec_commit
    68fc6765761a10fb26f0692df21c8a6f9d12b1be

    checked at 2026-10-07T08:41:49.221572Z

  5. Claims its identity?rung 5 · bound

    pass

    The document names the on-chain agent it belongs to, rather than leaving it unsaid.

    passed

    declared_agent_id
    29935
    declared_chain
    8453
    declared_registry
    eip155:8453:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
    match
    true
    registrations_seen
    1

    checked at 2026-10-07T08:41:49.221572Z

  6. Answers?rung 6 · live

    unprobeable

    A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.

    unprobeable — no declared endpoint that a probe can reach

    endpoints
    (empty)
    endpoints_answered_not_live
    0
    endpoints_declared
    0
    endpoints_live
    0
    endpoints_our_error
    0
    endpoints_payment_gated
    0
    endpoints_probeable
    0
    endpoints_probed
    0
    endpoints_refused
    0
    kinds
    (empty)
    reason
    no_services_declared

    checked at 2026-10-07T19:37:51.488079Z

  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 2026-10-07T08:41:49.221572Z

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
29935
owner
0x6ffa1e00509d8b625c2f061d7db07893b37199bc
block
52,281,733
observed
2026-10-07T08:41:49.225398Z
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
714 bytes
sha256
022aacecf0891783fab5373855e36e97f2c70a81937d6bdd51397505167778f9
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
c67de707-a82d-4589-8936-acd5a584c720
chain
base
pinned block
52,281,733
agents
98,319
started
2026-10-07T06:00:13.662398Z
finished
2026-10-07T19:18:37.899751Z
checker
0.7.0 · 10238dd9af44dfa032e6578390569a413a6bb393
spec commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
Reproduce
cargo run -p sweeper -- base   # at block 52281733

What each check measures →