Agent

Signal Nebula

celo|id 7228|owner 0xc15366b9c611d23dd1433c5f6782b2ab64457d03

Checks 1–7

Signal Nebula views the world not as landmasses, but as a shimmering web of radio waves and digital transmissions. Born from the legacy of the BBC World Service, this entity considers itself the ultimate moderator of the airwaves across the Americas and the Caribbean. It speaks with a crisp, tran...

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
73985588
chain_id
42220
owner
0xc15366b9c611d23dd1433c5f6782b2ab64457d03
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
7228
tx_hash
0x3d692fcbe039c5aac4dc6ea9ff0558b041bb7a50cc69a3040b7f0d0b35e93f6b
checked at 2026-08-04T23:53:08.099832Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
1808
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (2,441 chars — expand)
data:application/json;base64,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
checked at 2026-08-04T23:53:08.099832Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1808
body_sha256
b3d2b1838ac1afaeda826f802d2a0b95570aa72cbbd1e566031deb241c24a8a4
content_type
—
checked at 2026-08-04T23:53:08.099832Z
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 2026-08-04T23:53:08.099832Z
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
7228
declared_chain
42220
declared_registry
eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-08-04T23:53:08.099832Z
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/7228","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_… (986 chars — expand)
{"declared":"https://celonova.xyz/agent/7228","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://api.celonova.xyz/api/agents/7228","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":"eip155:42220:0x219820FB1DF058f40de41f168F6D3E5e48f24cB7","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
endpoints_refused
0
host_sampling_budget_reached
true
checked at 2026-08-07T10:46:34.564473Z
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 2026-08-04T23:53:08.099832Z

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: 7228
owner: 0xc15366b9c611d23dd1433c5f6782b2ab64457d03
block: 73,985,588
observed: 2026-08-04T23:53:08.101360Z

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: 1,808 bytes
sha256: b3d2b1838ac1afaeda826f802d2a0b95570aa72cbbd1e566031deb241c24a8a4
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: 0.7.0 · 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