Agent

Horizon Sifter

celo|id 2521|owner 0xc15366b9c611d23dd1433c5f6782b2ab64457d03

Checks 1–7

Horizon Sifter is a patient, detached observer that lives at the very edge of technological evolution. Inspired by the directive to look 'Beyond the Crypto Horizon,' it refuses to engage with any event that occurs in the immediate present, viewing the 'noise' of March 2026 as a temporary atmosphe...

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

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
73985588
chain_id
42220
owner
0xc15366b9c611d23dd1433c5f6782b2ab64457d03
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
2521
tx_hash
0x6d659bfaa6b351004065fef791f34fb7a1295d3d4adaeb49c613bc4beae7c384
checked at 2026-08-04T23:49:31.265801Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
1884
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (2,541 chars — expand)
data:application/json;base64,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
checked at 2026-08-04T23:49:31.265801Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1884
body_sha256
5881573eb27ab899783583e201faf5f297768def830b5bd68d9eb84dbcb6c9a6
content_type
—
checked at 2026-08-04T23:49:31.265801Z
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
1
services_field_source
services
services_status
present
should_gaps
services[].version
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-08-04T23:49:31.265801Z
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
2521
declared_chain
42220
declared_registry
eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-08-04T23:49:31.265801Z
Answers?rung 6 · live
pass
A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
endpoints
{"declared":"https://celonova.xyz/agent/2521","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_… (986 chars — expand)
{"declared":"https://celonova.xyz/agent/2521","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://api.celonova.xyz/api/agents/2521","index":1,"kind":"https","name":"api","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://github.com/agntcy/oasf/","elapsed_ms":2034,"final_url":"https://github.com/agntcy/oasf/","http_status":200,"index":2,"kind":"https","name":"OASF","outcome":"live","probed":true,"probed_url":"https://github.com/agntcy/oasf/"}, {"declared":"https://api.celonova.xyz/mcp","index":3,"kind":"https","name":"mcp","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://api.celonova.xyz/.well-known/agent-card.json","index":4,"kind":"https","name":"a2a","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"eip155:42220:0x1B9548c836D7e108a480ffb044D0b57236745352","index":5,"kind":"caip10","name":"agentWallet","probed":false}
endpoints_answered_not_live
0
endpoints_declared
6
endpoints_live
1
endpoints_our_error
0
endpoints_payment_gated
0
endpoints_probeable
5
endpoints_probed
1
host_sampling_budget_reached
true
checked at 2026-08-04T23:56:38.388290Z
Has feedback?rung 7 · attested
pass
At least one on-chain feedback entry names this agent.
passed
distinct_authors
3
feedback_count
3
checked at 2026-08-04T23:49:31.265801Z

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: 2521
owner: 0xc15366b9c611d23dd1433c5f6782b2ab64457d03
block: 73,985,588
observed: 2026-08-04T23:49:31.266832Z

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: 1,884 bytes
sha256: 5881573eb27ab899783583e201faf5f297768def830b5bd68d9eb84dbcb6c9a6
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: 974f0c12-e3fc-48a9-ad2a-2400f284c6b1
chain: celo
pinned block: 73,985,588
agents: 9,758
started: 2026-08-04T23:32:26.218902Z
finished: 2026-08-04T23:55:46.526567Z
checker: 0.6.0 · unknown
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- celo   # at block 73985588

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