Agent

HashProof

celo|id 1867|owner 0x0a25c91209a158d0a4922837cdd590ace0d13f0d

Checks 1–7

HashProof issues verifiable credentials (diplomas, course completions, attendance, memberships) with one API call — no account, no API key, no human onboarding. $0.10 USDC per credential, paid via x402 on Base (eip155:8453) or Celo (eip155:42220). Every credential is registered on-chain in the CredentialRegistry contract on Celo (0x7a1B759A602Aba72a70f99Dffd0a386d7504ce9B), pinned to IPFS, and delivered as a PDF with a QR code anyone can scan to verify for free against three independent sources: database, IPFS and blockchain. Agent flow: GET /templates/:ref/requirements (free) to discover required fields, POST /templates/:ref/preview (free) to check the layout, POST /issueCredential ($0.10 via x402) to issue, then share https://hashproof.dev/verify/:id. Verification is always free and public. Also available as an MCP server (npx hashproof-mcp, in the official MCP registry) and as an agent skill. Full guide: 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.

Registered?rung 1 · registered
pass
The agent exists in the on-chain registry, with an owner and a document URL.
passed
block_number
78133263
chain_id
42220
owner
0x0a25c91209a158d0a4922837cdd590ace0d13f0d
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
1867
tx_hash
0x4f8511da3b3899e82fd27793ab9e60674a732ec5d021f277694b27be65f47b00
checked at 2026-09-22T00:26:26.480223Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
elapsed_ms
483403
final_url
https://gateway.pinata.cloud/ipfs/QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s
gateway_attempts
{"error":null,"gateway":"https://ipfs.io/ipfs/","http_status":429}, {"error":"ssrf_blocked: dns resolution failed: faile… (337 chars — expand)
{"error":null,"gateway":"https://ipfs.io/ipfs/","http_status":429}, {"error":"ssrf_blocked: dns resolution failed: failed to lookup address information: Temporary failure in name resolution","gateway":"https://cloudflare-ipfs.com/ipfs/","http_status":null}, {"error":null,"gateway":"https://gateway.pinata.cloud/ipfs/","http_status":200}
http_status
200
request_url
https://gateway.pinata.cloud/ipfs/QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s
scheme
ipfs
uri
ipfs://QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s
via_gateway
https://gateway.pinata.cloud/ipfs/
checked at 2026-09-22T00:26:26.480223Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
2025
body_sha256
4e7179447195ffc3f5b597ac063bf56e30722bae8d258d81cf66361fc24f29e1
content_type
application/json
checked at 2026-09-22T00:26:26.480223Z
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
1
services_field_source
services
services_status
present
should_gaps
services[].version
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-09-22T00:26:26.480223Z
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
1867
declared_chain
42220
declared_registry
eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
match
true
registrations_seen
1
checked at 2026-09-22T00:26:26.480223Z
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://api.hashproof.dev","elapsed_ms":828,"final_url":"https://api.hashproof.dev/","http_status":200,"ind… (1,014 chars — expand)
{"declared":"https://api.hashproof.dev","elapsed_ms":828,"final_url":"https://api.hashproof.dev/","http_status":200,"index":0,"kind":"https","name":"web","outcome":"live","probed":true,"probed_url":"https://api.hashproof.dev"}, {"declared":"https://api.hashproof.dev/issueCredential","elapsed_ms":1346,"final_url":"https://api.hashproof.dev/issueCredential","http_status":402,"index":1,"kind":"https","name":"web","outcome":"live","payment_gated":true,"probed":true,"probed_url":"https://api.hashproof.dev/issueCredential"}, {"declared":"https://api.hashproof.dev/mcp","elapsed_ms":1161,"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://github.com/agntcy/oasf/","elapsed_ms":1747,"final_url":"https://github.com/agntcy/oasf/","http_status":200,"index":3,"kind":"https","name":"OASF","outcome":"live","probed":true,"probed_url":"https://github.com/agntcy/oasf/"}
endpoints_answered_not_live
1
endpoints_declared
4
endpoints_live
3
endpoints_our_error
0
endpoints_payment_gated
1
endpoints_probeable
4
endpoints_probed
4
endpoints_refused
0
checked at 2026-09-22T02:09:45.320852Z
Has feedback?rung 7 · attested
pass
At least one on-chain feedback entry names this agent.
passed
distinct_authors
4
feedback_count
4
checked at 2026-09-22T00:26:26.480223Z

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

celo

token id: 1867
owner: 0x0a25c91209a158d0a4922837cdd590ace0d13f0d
block: 78,133,263
observed: 2026-09-22T00:26:26.484500Z

tokenURIopen via ipfs.io →

ipfs://QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s

What the fetch saw

ipfs

scheme: ipfs
request url: https://gateway.pinata.cloud/ipfs/QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s
final url: https://gateway.pinata.cloud/ipfs/QmW32bRw6v7r16rLyHyApG7W4QSfdi8sUDtortKhcLNU4s
http status: 200
content type: application/json
size: 2,025 bytes
sha256: 4e7179447195ffc3f5b597ac063bf56e30722bae8d258d81cf66361fc24f29e1
elapsed: 483,403 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: 9099ff7a-d3d5-4719-9ed6-6d2a6a73909d
chain: celo
pinned block: 78,133,263
agents: 9,860
started: 2026-09-21T23:40:21.983586Z
finished: 2026-09-22T02:08:28.496509Z
checker: 0.7.0 · f60139c8802140544532ad9241c5d7a943939769
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- celo   # at block 78133263

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