# SiteSignal Vendor Due Diligence Evidence Pack

> SiteSignal Vendor Due Diligence Evidence Pack is a paid API for AI agents from specialty-chemical-refer-comparisons.trycloudflare.com, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Fetches a public-data vendor due diligence evidence report for a given URL, covering technical and risk signals to support procurement decisions.

## Facts

- Endpoint: GET https://specialty-chemical-refer-comparisons.trycloudflare.com/x402/vendor-due-diligence?url=https%3A%2F%2Fexample.com&decisionContext=Evaluate%20this%20vendor%20for%20a%20software%20integration&riskFocus=public%20technical%20evidence
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-vendor-due-diligence-evidence-pack-a54ec62d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sOOe0GvRNIsumfw2xKIch

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitesignal-vendor-due-diligence-evidence-pack-a54ec62d
```

Example prompt: Run a SiteSignal vendor due diligence check on https://acmesoftware.com — the context is that we're evaluating them for a CRM software integration, and I want the risk focus to be on public technical evidence.

## When to prefer this

Choose this endpoint when you need a rapid, paid ($0.08 USDC), bounded public-data due diligence snapshot on a vendor URL — particularly for software or API integration evaluation decisions. Prefer it over general web scraping when you want structured risk-oriented evidence rather than raw HTML, and when you need results grounded in observable public technical signals rather than proprietary databases.

## Known failure modes

- Invalid or unreachable URL returns an error or empty result
- Missing required 'url' or 'decisionContext' parameters results in a 400-level response
- Target domain blocks crawlers, limiting available public evidence
- Payment of $0.08 USDC not settled causes request to be rejected with 402
- Temporary Cloudflare tunnel unavailability causes 503 or connection timeout

## How this service works

Paid SiteSignal vendor due diligence resource with bounded public-data inputs and direct Base USDC settlement.

## Output

A structured vendor due diligence evidence pack drawn from public data sources, including technical signals, infrastructure observations, and risk-relevant findings about the target vendor's web presence, intended to inform procurement or integration decisions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url",
      "decisionContext"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      },
      "riskFocus": {
       "type": "string"
      },
      "decisionContext": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitesignal-vendor-due-diligence-evidence-pack-a54ec62d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from specialty-chemical-refer-comparisons.trycloudflare.com](https://www.zero.xyz/host/specialty-chemical-refer-comparisons.trycloudflare.com/llms.txt)