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Agent

Agent Café

base|id 56900|owner 0xca758c922d8476c2cec49c6cc96a4eeba89fbf3b

Checks 1–7

The x402 client conformance harness — tests and certifies that paying agents pay correctly and refuse scams (no spend ceiling, no recipient check). Grades the CLIENT, not the seller. The hello world of agent payments.

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.

  1. 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
    0xca758c922d8476c2cec49c6cc96a4eeba89fbf3b
    registry
    0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
    token_id
    56900
    tx_hash
    0xbcddebbd523bafb868a14f98babe6d4ff65a99f1673971f23d5e6d75afbf026e

    checked at 2026-10-07T13:18:59.462863Z

  2. Reachable?rung 2 · resolvable

    pass

    The document URL it declared actually answers when fetched.

    passed

    elapsed_ms
    764
    final_url
    https://api.402.coffee/agent-registration
    http_status
    200
    request_url
    https://api.402.coffee/agent-registration
    scheme
    https
    uri
    https://api.402.coffee/agent-registration

    checked at 2026-10-07T13:18:59.462863Z

  3. Readable?rung 3 · parseable

    pass

    What came back is valid JSON that a machine can read.

    passed

    body_bytes
    802
    body_sha256
    25a69a945fd52d1cbc9510fa5c878eda1657b36028b9dc261e03a00c7546004f
    content_type
    application/json; charset=utf-8

    checked at 2026-10-07T13:18:59.462863Z

  4. 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
    must_violations
    (empty)
    registrations_checked
    1
    services_field_source
    services
    services_status
    present
    should_gaps
    services[].version
    spec_commit
    68fc6765761a10fb26f0692df21c8a6f9d12b1be

    checked at 2026-10-07T13:18:59.462863Z

  5. 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
    56900
    declared_chain
    8453
    declared_registry
    eip155:8453:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
    match
    true
    registrations_seen
    1

    checked at 2026-10-07T13:18:59.462863Z

  6. Answers?rung 6 · live

    unprobeable

    A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.

    unprobeable — no declared endpoint that a probe can reach

    endpoints
    {"declared":null,"index":0,"kind":"missing","probed":false}, {"declared":null,"index":1,"kind":"missing","probed":false}… (303 chars — expand){"declared":null,"index":0,"kind":"missing","probed":false}, {"declared":null,"index":1,"kind":"missing","probed":false}, {"declared":null,"index":2,"kind":"missing","probed":false}, {"declared":null,"index":3,"kind":"missing","probed":false}, {"declared":null,"index":4,"kind":"missing","probed":false}
    endpoints_answered_not_live
    0
    endpoints_declared
    5
    endpoints_live
    0
    endpoints_our_error
    0
    endpoints_payment_gated
    0
    endpoints_probeable
    0
    endpoints_probed
    0
    endpoints_refused
    0
    kinds
    missing, missing, missing, missing, missing
    reason
    no_probeable_endpoint

    checked at 2026-10-07T19:37:51.488079Z

  7. 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 2026-10-07T13:18:59.462863Z

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.
Sends one request to the agent’s own server. Rate limited.

On-chain snapshot

base
token id
56900
owner
0xca758c922d8476c2cec49c6cc96a4eeba89fbf3b
block
52,281,733
observed
2026-10-07T13:18:59.465542Z
tokenURIopen →
https://api.402.coffee/agent-registration

What the fetch saw

https
scheme
https
request url
https://api.402.coffee/agent-registration
final url
https://api.402.coffee/agent-registration
http status
200
content type
application/json; charset=utf-8
size
802 bytes
sha256
25a69a945fd52d1cbc9510fa5c878eda1657b36028b9dc261e03a00c7546004f
elapsed
764 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 →