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Agent

HashProof

celo|id 9669|owner 0x2170bc5e5eeb2bbf3172abf2716d8bbb729d2ab6

Checks 1–7

Verifiable credentials API on Celo and Base. Issue trusted digital certificates with one API call for $0.10 USDC via x402 — no account, no API key. Each credential is registered on-chain in the CredentialRegistry contract on Celo (0x7a1B759A602Aba72a70f99Dffd0a386d7504ce9B), pinned to IPFS, and comes with a PDF with a QR code anyone can scan to verify for free against three independent sources. Agent-usable end to end: discover required fields at GET /templates/:ref/requirements (free), then POST /issueCredential paying x402 with USDC on Base (eip155:8453) or Celo (eip155:42220). Full agent guide at https://hashproof.dev/skill.md.

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
    74443315
    chain_id
    42220
    owner
    0x2170bc5e5eeb2bbf3172abf2716d8bbb729d2ab6
    registry
    0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
    token_id
    9669
    tx_hash
    0x5b898a3892c6db0d7f38f2c4f9e4ffefc1daeffec4c9a750ddc42f6b25cf132b

    checked at 2026-08-10T07:06:23.443308Z

  2. Reachable?rung 2 · resolvable

    pass

    The document URL it declared actually answers when fetched.

    passed

    elapsed_ms
    530
    final_url
    https://www.hashproof.dev/metadata.json
    http_status
    200
    request_url
    https://www.hashproof.dev/metadata.json
    scheme
    https
    uri
    https://www.hashproof.dev/metadata.json

    checked at 2026-08-10T07:06:23.443308Z

  3. Readable?rung 3 · parseable

    pass

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

    passed

    body_bytes
    2081
    body_sha256
    7888d944d4c17974653baf1986f70c3fb798b684ae27e40ba948fcc71a0f78bd
    content_type
    application/json; charset=utf-8

    checked at 2026-08-10T07:06:23.443308Z

  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
    (empty)
    must_violations
    (empty)
    registrations_checked
    2
    services_field_source
    services
    services_status
    present
    should_gaps
    services[].version
    spec_commit
    68fc6765761a10fb26f0692df21c8a6f9d12b1be

    checked at 2026-08-10T07:06:23.443308Z

  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
    9669
    declared_chain
    42220
    declared_registry
    eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
    match
    true
    registrations_seen
    2

    checked at 2026-08-10T07:06:23.443308Z

  6. 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://hashproof.dev","elapsed_ms":322,"final_url":"https://www.hashproof.dev/","http_status":200,"index":… (1,390 chars — expand){"declared":"https://hashproof.dev","elapsed_ms":322,"final_url":"https://www.hashproof.dev/","http_status":200,"index":0,"kind":"https","name":"web","outcome":"live","probed":true,"probed_url":"https://hashproof.dev"}, {"declared":"https://api.hashproof.dev/issueCredential","elapsed_ms":1521,"final_url":"https://api.hashproof.dev/issueCredential","http_status":402,"index":1,"kind":"https","name":"x402-issue-credential","outcome":"live","payment_gated":true,"probed":true,"probed_url":"https://api.hashproof.dev/issueCredential"}, {"declared":"https://api.hashproof.dev/mcp","elapsed_ms":1113,"final_url":"https://api.hashproof.dev/mcp","http_status":405,"index":2,"kind":"https","name":"MCP","outcome":"not_live","probed":true,"probed_url":"https://api.hashproof.dev/mcp"}, {"declared":"https://hashproof.dev/skill.md","elapsed_ms":537,"final_url":"https://www.hashproof.dev/skill.md","http_status":200,"index":3,"kind":"https","name":"skill","outcome":"live","probed":true,"probed_url":"https://hashproof.dev/skill.md"}, {"declared":"eip155:42220:0x0a25C91209a158D0a4922837cdd590aCe0D13f0d","index":4,"kind":"caip10","name":"agentWallet","probed":false}, {"declared":"https://api.hashproof.dev/","elapsed_ms":930,"final_url":"https://api.hashproof.dev/","http_status":200,"index":5,"kind":"https","name":"OASF","outcome":"live","probed":true,"probed_url":"https://api.hashproof.dev/"}
    endpoints_answered_not_live
    1
    endpoints_declared
    6
    endpoints_live
    4
    endpoints_our_error
    0
    endpoints_payment_gated
    1
    endpoints_probeable
    5
    endpoints_probed
    5
    endpoints_refused
    0

    checked at 2026-08-10T07:07:52.226139Z

  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 2026-08-10T07:06:23.443308Z

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

celo
token id
9669
owner
0x2170bc5e5eeb2bbf3172abf2716d8bbb729d2ab6
block
74,443,315
observed
2026-08-10T07:06:23.445659Z
tokenURIopen →
https://www.hashproof.dev/metadata.json

What the fetch saw

https
scheme
https
request url
https://www.hashproof.dev/metadata.json
final url
https://www.hashproof.dev/metadata.json
http status
200
content type
application/json; charset=utf-8
size
2,081 bytes
sha256
7888d944d4c17974653baf1986f70c3fb798b684ae27e40ba948fcc71a0f78bd
elapsed
530 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
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
Reproduce
cargo run -p sweeper -- celo   # at block 74443315

What each check measures →