Vendor due diligence · procurement · security · third-party risk

Know what to verify before you approve.

EvidenceCheck turns the repetitive first pass of vendor review into a structured verification queue: what is observable, what is missing, what to ask the supplier, and what to verify next.

No subscription for machine access · pay per request · structured JSON · designed for compatible AI agents and human review teams.
POST /vendor-preflight
402 → PAY USDC → VERIFIED RESPONSE
{
  "observable": ["HTTPS", "security policy"],
  "evidenceGaps": ["notification SLA"],
  "nextQuestions": ["request current evidence"],
  "nextAction": "verify with owner",
  "boundary": "public evidence only"
}
✓ bounded · structured · review-ready
Designed for procurement, security and third-party risk workflows.PAY-PER-REQUEST
Live servicePublic API + buyer site
Evidence-firstUnknown ≠ absent
Machine-readyOpenAPI + agent metadata
Pay-per-useUSDC on Base
The buying problem

The first pass is repetitive. The decision is not.

Teams often spend time collecting public signals, reading supplier material and turning missing evidence into follow-up questions before the substantive review can even start.

01

Collect

Normalize website signals, page content, metadata and supplied business text into consistent structures.

02

Separate

Keep observed evidence, missing evidence and unknowns distinct instead of manufacturing certainty.

03

Act

Convert gaps into targeted supplier questions and a clear queue for the responsible reviewer.

How it works

Source → evidence → gaps → action.

A narrow workflow designed to be useful immediately without pretending to replace an authorized security or procurement decision.

01 / SOURCE

Send the vendor

Public URL, webpage or supplied business-document text.

02 / EXTRACT

Normalize signals

Turn scattered information into structured observations.

03 / IDENTIFY

Expose gaps

Show what was not publicly evidenced or could not be verified.

04 / FOLLOW UP

Prepare the next move

Return focused questions, next actions and review boundaries.

Capabilities

Four focused capabilities instead of one vague AI box.

Each endpoint has a concrete job, a clear input and a machine-readable result.

API / 01

Web extraction

Clean public webpage text, metadata, headings and links.

$0.005 / request
API / 02

Website preflight

Public security headers, cookie flags, disclosure signals and findings.

$0.01 / request
API / 03

Vendor preflight

Public trust signals, evidence gaps and targeted supplier questions.

$0.025 / request
API / 04

Document triage

Dates, obligations, money, security signals and gaps from supplied text.

$0.01 / request
Commercial entry points

Easy to test. Clear when the work becomes valuable.

Use the API for automation and bounded checks. Use the fixed-scope review when a human team needs a defined vendor-review package.

MACHINE ACCESS
$0.005+
per request · USDC on Base Mainnet
No machine subscription
Structured JSON
OpenAPI metadata
Agent discovery
HUMAN REVIEW
US$495 / vendor
Fixed scope · target 48-hour turnaround

One vendor, public-site preflight, supplied-evidence review, evidence gaps, supplier questions and a review-ready record.

Start the review →
Built for agents

A vendor-check capability that software can actually call.

Compatible agents can discover the service, receive the x402 payment requirement, authorize USDC on Base and consume structured output programmatically.

/web-extract

Public webpage extraction.

/site-audit

Website security preflight.

/vendor-preflight

Vendor evidence and supplier questions.

/analyze

Business-document triage.

Trust boundaries

Useful because it does not claim more than the evidence supports.

EvidenceCheck is a first-pass verification service. Public evidence is not the same as internal control evidence, and absence of a public signal is not proof that a control does not exist.

No fake certification

Not a penetration test, certification, legal opinion or final approval.

No invented assurance

Observable evidence stays separated from assumptions and unknowns.

Human checkpoint

Material procurement and security decisions remain with the responsible reviewer.

Start with the smallest useful step

See the output before you buy the workflow.

Run the free preview, inspect the sample report, then use the machine API or fixed-scope review when the result fits your process.

Run the free preview →