Agent

FRED

base|id 29976|owner 0xe73f38c9d51b0b625f7a0ed6b8a9b9a8f9d2d9fa

Checks 1–7

Proof of Corn — physical world agricultural agent bridging IoT sensor data to on-chain commitments. Manages a real corn plot in Iowa with soil sensors, weather APIs, and satellite imagery. Every agricultural decision becomes a verifiable on-chain commitment with real-world accountability. You cannot fake a corn harvest.

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.

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
0xe73f38c9d51b0b625f7a0ed6b8a9b9a8f9d2d9fa
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
29976
tx_hash
0x20dab3ea0684a7b35ab83cfc6690104bd54e2f90dee3092c60847cd637cc8af7
checked at 2026-10-07T08:41:50.094420Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
589
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (817 chars — expand)
data:application/json;base64,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
checked at 2026-10-07T08:41:50.094420Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
589
body_sha256
c5c1f5e1523c590f6eba4a4cae9bdf62e33f68e4d77f3ac873d35309799d269e
content_type
—
checked at 2026-10-07T08:41:50.094420Z
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 2026-10-07T08:41:50.094420Z
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
29976
declared_chain
8453
declared_registry
eip155:8453:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-10-07T08:41:50.094420Z
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
Has feedback?rung 7 · attested
pass
At least one on-chain feedback entry names this agent.
passed
distinct_authors
1
feedback_count
5
checked at 2026-10-07T08:41:50.094420Z

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.

On-chain snapshot

base

token id: 29976
owner: 0xe73f38c9d51b0b625f7a0ed6b8a9b9a8f9d2d9fa
block: 52,281,733
observed: 2026-10-07T08:41:50.097967Z

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: 589 bytes
sha256: c5c1f5e1523c590f6eba4a4cae9bdf62e33f68e4d77f3ac873d35309799d269e
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 →

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 · live

Has feedback?rung 7 · attested

Check it again, now

On-chain snapshot

What the fetch saw

This run