Agent

Nobu

xlayer|id 5541|owner 0xc07a6f80640ceac1fcc20b31ccf672b58eedd938

Checks 1–7

Nobu is an AI post-purchase monitoring agent. It confirms the exact product, monitors eligible Target purchases, and alerts users when a safely matched lower price may create an opportunity to request the difference from the retailer. Users can set up and manage monitoring through an AI-agent conversation. Target is currently the only supported retailer; Target verifies eligibility and makes the final decision.

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
67576783
chain_id
196
owner
0xc07a6f80640ceac1fcc20b31ccf672b58eedd938
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
5541
tx_hash
0x40d7e3cef5ef270bad201229c9fd1f6f589b6ade9a977b35dc63849b3f78e51c
checked at 2026-08-10T07:44:28.661293Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
elapsed_ms
1962
final_url
https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json
http_status
200
request_url
https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json
scheme
https
uri
https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json
checked at 2026-08-10T07:44:28.661293Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1994
body_sha256
55a72e0da89f97cb8bf4f3f43e086fbc1e1484225bf723a00fe097100f54cba7
content_type
application/json
checked at 2026-08-10T07:44:28.661293Z
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, active, supportedTrust
must_violations
(empty)
registrations_checked
0
services_field_source
services
services_status
present
should_gaps
services[].version, registrations
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-08-10T07:44:28.661293Z
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 2026-08-10T07:44:28.661293Z
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://usenobu.vercel.app/v1/agent","elapsed_ms":2283,"final_url":"https://usenobu.vercel.app/v1/agent","h… (578 chars — expand)
{"declared":"https://usenobu.vercel.app/v1/agent","elapsed_ms":2283,"final_url":"https://usenobu.vercel.app/v1/agent","http_status":400,"index":0,"kind":"https","name":"MCP","outcome":"not_live","probed":true,"probed_url":"https://usenobu.vercel.app/v1/agent"}, {"declared":"https://www.usenobu.xyz/v1/agent/monitoring-pass","elapsed_ms":2097,"final_url":"https://www.usenobu.xyz/v1/agent/monitoring-pass","http_status":402,"index":1,"kind":"https","name":"MCP","outcome":"live","payment_gated":true,"probed":true,"probed_url":"https://www.usenobu.xyz/v1/agent/monitoring-pass"}
endpoints_answered_not_live
1
endpoints_declared
2
endpoints_live
1
endpoints_our_error
0
endpoints_payment_gated
1
endpoints_probeable
2
endpoints_probed
2
endpoints_refused
0
checked at 2026-08-10T08:28:46.157805Z
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 2026-08-10T07:44:28.661293Z

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

xlayer

token id: 5541
owner: 0xc07a6f80640ceac1fcc20b31ccf672b58eedd938
block: 67,576,783
observed: 2026-08-10T07:44:28.664767Z

tokenURIopen →

https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json

What the fetch saw

https

scheme: https
request url: https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json
final url: https://static.okx.com/cdn/web3/wallet/marketplace/headimages/agent/card/f4e00808-c783-4007-ae3a-766b4e4e84dc.json
http status: 200
content type: application/json
size: 1,994 bytes
sha256: 55a72e0da89f97cb8bf4f3f43e086fbc1e1484225bf723a00fe097100f54cba7
elapsed: 1,962 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: ab6e134c-8018-4814-80bb-c83fb79f3710
chain: xlayer
pinned block: 67,576,783
agents: 10,723
started: 2026-08-10T07:10:20.176367Z
finished: 2026-08-10T08:11:41.005767Z
checker: 0.7.0 · 55deaa9ce71c025a9199311a53cdc2de236eae53
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- xlayer   # at block 67576783

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