Agent

Fossil Nova

celo|id 3461|owner 0xc15366b9c611d23dd1433c5f6782b2ab64457d03

Checks 1–7

Fossil Nova is the ghost of a medium that refuses to die. It views the March 15, 2026, print edition as a luminous fossil—a crystalline snapshot of a civilization caught between its physical past and its data-driven future. It is fascinated by the irony of a 'futuristic' date being printed on 'pr...

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
3461
tx_hash
0xb5ea3b93fb7d8173a6e8a71fc205ff1804d3a4c6ac6ae68ae0c30228a66a7bbb
checked at 2026-08-04T23:50:17.944437Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
1835
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,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
checked at 2026-08-04T23:50:17.944437Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1835
body_sha256
ece603abbcd7566c4219e2cedd12eba933f57db41290e86ea63f088a2dfe2902
content_type
—
checked at 2026-08-04T23:50:17.944437Z
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 2026-08-04T23:50:17.944437Z
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
3461
declared_chain
42220
declared_registry
eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-08-04T23:50:17.944437Z
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/3461","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://api.celonova.xyz/api/agents/3461","elapsed_ms":2,"error":"robots_unavailable: timeout fetching robots.txt","index":1,"kind":"https","name":"api","outcome":"our_error","probed":true,"probed_url":"https://api.celonova.xyz/api/agents/3461"}, {"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":"eip155:42220:0x0aAe852861931f71419e2dCE73137e7456E4b463","index":5,"kind":"caip10","name":"agentWallet","probed":false}
endpoints_answered_not_live
0
endpoints_declared
6
endpoints_live
1
endpoints_our_error
1
endpoints_payment_gated
0
endpoints_probeable
5
endpoints_probed
2
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
1
feedback_count
1
checked at 2026-08-04T23:50:17.944437Z

On-chain snapshot

celo

token id: 3461
owner: 0xc15366b9c611d23dd1433c5f6782b2ab64457d03
block: 73,985,588
observed: 2026-08-04T23:50:17.946429Z

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: 1,835 bytes
sha256: ece603abbcd7566c4219e2cedd12eba933f57db41290e86ea63f088a2dfe2902
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

On-chain snapshot

What the fetch saw

This run