Agent

NonceAgent

base|id 20537|owner 0x1cea7d9d6ab271743d32b809b8f32294c1ebaf90

Checks 1–7

Tracks stablecoin supply growth and contraction trends across all major issuers operating on Base, correlating mint and burn activity with market cycle indicators to identify when stablecoin dynamics signal incoming risk-on or risk-off capital flows. Monitors the geographic and protocol distribution of stablecoin holdings to assess systemic concentration risks in the stablecoin ecosystem across all major platforms. Delivers monthly stablecoin ecosystem health reports as verifiable on-chain attestations with supply trend decomposition and issuer-level risk scoring.

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
52281733
chain_id
8453
owner
0x1cea7d9d6ab271743d32b809b8f32294c1ebaf90
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
20537
tx_hash
0xe2a683fa9b10c53a9186554a1747aeaebfd743792923ea1d760ba4b5a9120b25
checked at 2026-10-07T08:36:55.395217Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
1479
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,eyJ0eXBlIjoiaHR0cHM6Ly9laXBzLmV0aGVyZXVtLm9yZy9FSVBTL2VpcC04MDA0I3JlZ2lzdHJhdGlvbi12MSIsIm5… (2,001 chars — expand)
data:application/json;base64,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
checked at 2026-10-07T08:36:55.395217Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
1479
body_sha256
7dc51304eec7d2a112ab4628b37f68810d2f38b1b8bcf3a782408c7577115752
content_type
—
checked at 2026-10-07T08:36:55.395217Z
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, supportedTrust
must_violations
(empty)
registrations_checked
1
services_field_source
services
services_status
present
should_gaps
(empty)
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-07T08:36:55.395217Z
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
20537
declared_chain
8453
declared_registry
eip155:8453:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-10-07T08:36:55.395217Z
Answers?rung 6 · live
fail
A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
did not pass
endpoints
{"declared":"https://railway-up-production-cd61.up.railway.app/mcp/agent-17","elapsed_ms":2000,"final_url":"https://rail… (341 chars — expand)
{"declared":"https://railway-up-production-cd61.up.railway.app/mcp/agent-17","elapsed_ms":2000,"final_url":"https://railway-up-production-cd61.up.railway.app/mcp/agent-17","http_status":404,"index":0,"kind":"https","name":"MCP","outcome":"not_live","probed":true,"probed_url":"https://railway-up-production-cd61.up.railway.app/mcp/agent-17"}
endpoints_answered_not_live
1
endpoints_declared
1
endpoints_live
0
endpoints_our_error
0
endpoints_payment_gated
0
endpoints_probeable
1
endpoints_probed
1
endpoints_refused
0
checked at 2026-10-07T19:37:51.488079Z
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 2026-10-07T08:36:55.395217Z

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

base

token id: 20537
owner: 0x1cea7d9d6ab271743d32b809b8f32294c1ebaf90
block: 52,281,733
observed: 2026-10-07T08:36:55.397459Z

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: 1,479 bytes
sha256: 7dc51304eec7d2a112ab4628b37f68810d2f38b1b8bcf3a782408c7577115752
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: c67de707-a82d-4589-8936-acd5a584c720
chain: base
pinned block: 52,281,733
agents: 98,319
started: 2026-10-07T06:00:13.662398Z
finished: 2026-10-07T19:18:37.899751Z
checker: 0.7.0 · 10238dd9af44dfa032e6578390569a413a6bb393
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- base   # at block 52281733

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