Agent

Fieldcast

celo|id 9791|owner 0xbb2a9f48288efc8f8e4e245074ce47b5d76b7500

Checks 1–7

Fieldcast turns documents into structured JSON in a single API call. The caller sends a PDF or raw text together with a list of field names, and receives exactly those fields back as typed JSON: numbers as numbers, dates normalised to ISO-8601. A field that does not appear in the document is returned as null rather than a fabricated value, which is the design choice that makes it safe for accounting and finance workflows. There are no templates to configure and no model to select, so a document layout nobody has seen before goes through the same call as a familiar one. Agents can call the standard API-key endpoint, or the x402 endpoint which requires no account: the agent receives HTTP 402 with machine-readable payment terms, settles in USDC, and gets the extraction in the same flow. Free tier: 50 extractions per month. Live at https://fieldcast-peach.vercel.app

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
79282391
chain_id
42220
owner
0xbb2a9f48288efc8f8e4e245074ce47b5d76b7500
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
9791
tx_hash
0x02b234d6d7f5a41460531b4312f559b1c50c8813c8351a3dd6ceee99d0eada48
checked at 2026-10-05T07:20:58.201899Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
1286
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,ewogICJ0eXBlIjogImh0dHBzOi8vZWlwcy5ldGhlcmV1bS5vcmcvRUlQUy9laXAtODAwNCNyZWdpc3RyYXRpb24tdjE… (1,745 chars — expand)
data:application/json;base64,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
checked at 2026-10-05T07:20:58.201899Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1286
body_sha256
b13b11ab8e3a276d289d697c9394724316561c24c18758fb2ac4951dbfa87d4d
content_type
—
checked at 2026-10-05T07:20:58.201899Z
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, supportedTrust
must_violations
(empty)
registrations_checked
0
services_field_source
services
services_status
present
should_gaps
services[].version, registrations
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-05T07:20:58.201899Z
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 2026-10-05T07:20:58.201899Z
Answers?rung 6 · live
fail
A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
did not pass
endpoints
{"declared":"https://fieldcast-peach.vercel.app/x402/extract","elapsed_ms":2635,"final_url":"https://fieldcast-peach.ver… (299 chars — expand)
{"declared":"https://fieldcast-peach.vercel.app/x402/extract","elapsed_ms":2635,"final_url":"https://fieldcast-peach.vercel.app/x402/extract","http_status":405,"index":0,"kind":"https","name":"custom","outcome":"not_live","probed":true,"probed_url":"https://fieldcast-peach.vercel.app/x402/extract"}
endpoints_answered_not_live
1
endpoints_declared
1
endpoints_live
0
endpoints_our_error
0
endpoints_payment_gated
0
endpoints_probeable
1
endpoints_probed
1
endpoints_refused
0
checked at 2026-10-05T07:31:54.600744Z
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 2026-10-05T07:20:58.201899Z

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

celo

token id: 9791
owner: 0xbb2a9f48288efc8f8e4e245074ce47b5d76b7500
block: 79,282,391
observed: 2026-10-05T07:20:58.204949Z

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: 1,286 bytes
sha256: b13b11ab8e3a276d289d697c9394724316561c24c18758fb2ac4951dbfa87d4d
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: 51518bd2-6305-4b27-a769-cf957aba00f4
chain: celo
pinned block: 79,282,391
agents: 9,878
started: 2026-10-05T06:52:29.184815Z
finished: 2026-10-05T07:30:46.088420Z
checker: 0.7.0 · 10238dd9af44dfa032e6578390569a413a6bb393
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- celo   # at block 79282391

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