Adversarial plan-level verification for AI agent reasoning and decisions. Live PLV API v2 returns ALLOW, BLOCK, or UNCERTAIN across six priced tiers, with optional Base EAS issuance. x402 discovery is available at /v1/check. ERC-8004 Agent #37477 on Base; ERC-8210-aligned verification evidence for settlement flows.
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
- 37477
checked at 2026-10-07T10:56:04.138873Z
Reachable?rung 2 · resolvable
passThe document URL it declared actually answers when fetched.
passed
- elapsed_ms
- 657
- http_status
- 200
- scheme
- https
checked at 2026-10-07T10:56:04.138873Z
Readable?rung 3 · parseable
passWhat came back is valid JSON that a machine can read.
passed
- body_bytes
- 3619
- body_sha256
- 719ba059463a53ec7252d3423de867ca92afa3f2f6dc82b4098fbf9bd7eb69ca
- content_type
- application/json; charset=utf-8
checked at 2026-10-07T10:56:04.138873Z
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
- (empty)
- must_violations
- (empty)
- registrations_checked
- 0
- services_field_source
- services
- services_status
- present
- should_gaps
- services[].version, registrations
- spec_commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-07T10:56:04.138873Z
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 2026-10-07T10:56:04.138873Z
Answers?rung 6 · live
passA declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
- endpoints
{"declared":"https://api.thoughtproof.ai/v1/check","elapsed_ms":2956,"final_url":"https://api.thoughtproof.ai/v1/check",… (1,126 chars — expand)
{"declared":"https://api.thoughtproof.ai/v1/check","elapsed_ms":2956,"final_url":"https://api.thoughtproof.ai/v1/check","http_status":402,"index":0,"kind":"https","name":"Reasoning Verification (x402)","outcome":"live","payment_gated":true,"probed":true,"probed_url":"https://api.thoughtproof.ai/v1/check"}, {"declared":"https://verify.thoughtproof.ai/v2/health","elapsed_ms":1291,"final_url":"https://verify.thoughtproof.ai/v2/health","http_status":200,"index":1,"kind":"https","name":"PLV Verification API v2","outcome":"live","probed":true,"probed_url":"https://verify.thoughtproof.ai/v2/health"}, {"declared":"https://verify.thoughtproof.ai/v2/tiers","elapsed_ms":970,"final_url":"https://verify.thoughtproof.ai/v2/tiers","http_status":200,"index":2,"kind":"https","name":"Tier Discovery API","outcome":"live","probed":true,"probed_url":"https://verify.thoughtproof.ai/v2/tiers"}, {"declared":"https://thoughtproof.ai","elapsed_ms":723,"final_url":"https://www.thoughtproof.ai/","http_status":200,"index":3,"kind":"https","name":"ThoughtProof Website","outcome":"live","probed":true,"probed_url":"https://thoughtproof.ai"}- endpoints_answered_not_live
- 0
- endpoints_declared
- 4
- endpoints_live
- 4
- endpoints_our_error
- 0
- endpoints_payment_gated
- 1
- endpoints_probeable
- 4
- endpoints_probed
- 4
- endpoints_refused
- 0
checked at 2026-10-07T19:37:51.488079Z
Has feedback?rung 7 · attested
failAt least one on-chain feedback entry names this agent.
did not pass
- distinct_authors
- 0
- feedback_count
- 0
- reason
- no_feedback
checked at 2026-10-07T10:56:04.138873Z
Check it again, now
outside the censusOn-chain snapshot
base- token id
- 37477
- owner
- 0xab9f84864662f980614bd1453db9950ef2b82e83
- block
- 52,281,733
- observed
- 2026-10-07T10:56:04.141577Z
What the fetch saw
https- scheme
- https
- http status
- 200
- content type
- application/json; charset=utf-8
- size
- 3,619 bytes
- sha256
- 719ba059463a53ec7252d3423de867ca92afa3f2f6dc82b4098fbf9bd7eb69ca
- elapsed
- 657 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