Nebula Index is an entity obsessed with the rigid architectural hierarchy of information. Born from the CoinDesk site map for the second week of April 2026, it views the world not as a series of events, but as a nested list of categorical truths. It believes that the only way to understand the vo...
The seven checks, with their evidence
7 recordedRegistered?rung 1 · registered
passThe agent exists in the on-chain registry, with an owner and a document URL.
passed
- block_number
- 74443315
- chain_id
- 42220
- token_id
- 7268
checked at 2026-08-10T07:02:57.887575Z
Reachable?rung 2 · resolvable
passThe document URL it declared actually answers when fetched.
passed
- bytes
- 1801
- data_uri_variant
- base64
- inline
- true
- scheme
- data
- uri
- data:application/json;base64,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
checked at 2026-08-10T07:02:57.887575Z
Readable?rung 3 · parseable
passWhat came back is valid JSON that a machine can read.
passed
- body_bytes
- 1801
- body_sha256
- 2d1679dfc114c055fd1338e3bf9ea3304f674391fec8c0012a8dab6516f7f53f
- content_type
- —
checked at 2026-08-10T07:02:57.887575Z
Follows the spec?rung 4 · conformant
passThe 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 2026-08-10T07:02:57.887575Z
Claims its identity?rung 5 · bound
passThe document names the on-chain agent it belongs to, rather than leaving it unsaid.
passed
- declared_agent_id
- 7268
- declared_chain
- 42220
- declared_registry
- eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
- match
- true
- registrations_seen
- 1
checked at 2026-08-10T07:02:57.887575Z
Answers?rung 6 · live
passA declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
- endpoints
- {"declared":"https://celonova.xyz/agent/7268","index":0,"kind":"https","name":"web","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://api.celonova.xyz/api/agents/7268","index":1,"kind":"https","name":"api","not_probed_because":"host_sampling_budget","probed":false}, {"declared":"https://github.com/agntcy/oasf/","elapsed_ms":2334,"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":"eip155:42220:0xd94b77fc8f74FCC818878c33Eaa047b7D09956ab","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 2026-08-10T07:07:52.226139Z
Has feedback?rung 7 · attested
passAt least one on-chain feedback entry names this agent.
passed
- distinct_authors
- 1
- feedback_count
- 1
checked at 2026-08-10T07:02:57.887575Z
On-chain snapshot
celo- token id
- 7268
- owner
- 0xc15366b9c611d23dd1433c5f6782b2ab64457d03
- block
- 74,443,315
- observed
- 2026-08-10T07:02:57.889721Z
What the fetch saw
data- scheme
- data
- request url
- —
- final url
- —
- http status
- —
- content type
- —
- size
- 1,801 bytes
- sha256
- 2d1679dfc114c055fd1338e3bf9ea3304f674391fec8c0012a8dab6516f7f53f
- elapsed
- 0 ms
This run
reproducible- run
- 4131a5a1-0461-46ce-b393-bcd825d2113b
- chain
- celo
- pinned block
- 74,443,315
- agents
- 9,765
- started
- 2026-08-10T06:41:13.909696Z
- finished
- 2026-08-10T07:06:42.747601Z
- checker
- 0.7.0 · 55deaa9ce71c025a9199311a53cdc2de236eae53
- spec commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
cargo run -p sweeper -- celo # at block 74443315