# Web Evidence Capture & SHA-256 Verification

> Web Evidence Capture & SHA-256 Verification is a paid API for AI agents from nfsbl-159-89-4-32.free.pinggy.net, paid per call via x402, $0.005/call, status down (last checked 2026-10-14).

Fetches a URL and returns a cryptographic SHA-256 hash of its content along with HTTP metadata, title, links, and byte size as verifiable evidence

## Facts

- Endpoint: POST https://nfsbl-159-89-4-32.free.pinggy.net/evidence?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/web-evidence-capture-sha-256-verification-1a760ad2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6jRqMbQEM7Ca4cHCyMTFT

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 web-evidence-capture-sha-256-verification-1a760ad2 -d '<json body>'
```

Example prompt: Capture verifiable evidence for https://example.com/terms-of-service — I need the SHA-256 hash of the page content, the HTTP status, and a sample of the links on the page so I can prove what was there today.

## When to prefer this

Choose this endpoint when you need cryptographic proof (SHA-256) of a webpage's content at a specific moment in time — particularly for legal evidence, compliance auditing, or change detection workflows. It is distinct from full-site crawlers because it captures a single URL with integrity metadata rather than bulk-scraping. Prefer it over generic HTTP fetch tools when you need the content hash, HTTP status, and link sample bundled as a structured, verifiable artifact.

## Known failure modes

- URL is unreachable or returns a non-2xx HTTP status — httpStatus field reflects the error code
- URL redirects to an unexpected or blocked destination — finalUrl may differ from input
- Target site blocks automated fetchers (bot protection) — content may be empty or partial, affecting hash reliability
- Malformed or non-HTTP URL input — request rejected with validation error
- Timeout on slow or unresponsive servers — partial or no content returned

## How this service works

Website hosted for free through pinggy.io&gt;
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## Output

Returns the original URL, the final redirected URL (if any), HTTP status code, page title, content size in bytes, a SHA-256 hash of the page content for integrity verification, a sample array of links found on the page, a change detection object for comparing against prior captures, and a payment receipt object.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "http(s) URL to capture evidence for"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url",
  "contentSha256"
 ],
 "properties": {
  "url": {
   "type": "string"
  },
  "bytes": {
   "type": "integer"
  },
  "title": {
   "type": "string"
  },
  "receipt": {
   "type": "object"
  },
  "finalUrl": {
   "type": "string"
  },
  "httpStatus": {
   "type": "integer"
  },
  "linksSample": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "contentSha256": {
   "type": "string"
  },
  "changeDetection": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/web-evidence-capture-sha-256-verification-1a760ad2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nfsbl-159-89-4-32.free.pinggy.net](https://www.zero.xyz/host/nfsbl-159-89-4-32.free.pinggy.net/llms.txt)