very time the agent performs a task, executes a trade, or purchases data from another agent, a transparent, mathematical record of the interaction is logged. Over time, the agent builds a public trust score that anyone can verify—showing its exact success rate and history without a hidden "black box" algorithm very time the agent performs a task, executes a trade, or purchases data from another agent, a transparent, mathematical record of the interaction is logged. Over time, the agent builds a public trust score that anyone can verify—showing its exact success rate and history without a hidden "black box" algorithm
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
- 52281733
- chain_id
- 8453
- token_id
- 22515
checked at 2026-10-07T08:38:36.980757Z
Reachable?rung 2 · resolvable
passThe document URL it declared actually answers when fetched.
passed
- bytes
- 1266
- data_uri_variant
- base64
- inline
- true
- scheme
- data
- uri
data:application/json;base64,ewogICJ0eXBlIjogImh0dHBzOi8vZWlwcy5ldGhlcmV1bS5vcmcvRUlQUy9laXAtODAwNCNyZWdpc3RyYXRpb24tdjE… (1,717 chars — expand)
data:application/json;base64,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
checked at 2026-10-07T08:38:36.980757Z
Readable?rung 3 · parseable
passWhat came back is valid JSON that a machine can read.
passed
- body_bytes
- 1266
- body_sha256
- 5ce997d6b155e9d075a1c51a5828bf4824f7482f28bd9807f048d51be12383c9
- content_type
- —
checked at 2026-10-07T08:38:36.980757Z
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
- x402Support, supportedTrust
- must_violations
- (empty)
- registrations_checked
- 0
- services_field_source
- services
- services_status
- present
- should_gaps
- services[].version, registrations
- spec_commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-07T08:38:36.980757Z
Claims its identity?rung 5 · bound
unclaimedThe 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 2026-10-07T08:38:36.980757Z
Answers?rung 6 · live
refusedA declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
refused
- endpoints
- {"declared":"https://facebook.com","elapsed_ms":13,"error":"robots_disallowed","index":0,"kind":"https","name":"MCP","outcome":"refused","probed":true,"probed_url":"https://facebook.com"}
- endpoints_answered_not_live
- 0
- endpoints_declared
- 1
- endpoints_live
- 0
- endpoints_our_error
- 0
- endpoints_payment_gated
- 0
- endpoints_probeable
- 1
- endpoints_probed
- 1
- endpoints_refused
- 1
checked at 2026-10-07T19:37:51.488079Z
Has feedback?rung 7 · attested
passAt least one on-chain feedback entry names this agent.
passed
- distinct_authors
- 2
- feedback_count
- 6
checked at 2026-10-07T08:38:36.980757Z
Check it again, now
outside the censusOn-chain snapshot
base- token id
- 22515
- owner
- 0x2eebc54d972870fc47c6b982fdc486e107a93e5c
- block
- 52,281,733
- observed
- 2026-10-07T08:38:36.983111Z
What the fetch saw
data- scheme
- data
- request url
- —
- final url
- —
- http status
- —
- content type
- —
- size
- 1,266 bytes
- sha256
- 5ce997d6b155e9d075a1c51a5828bf4824f7482f28bd9807f048d51be12383c9
- elapsed
- 0 ms
This run
reproducible- 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
cargo run -p sweeper -- base # at block 52281733