# Tollkit Attest

> Tollkit Attest is a paid API for AI agents from data.tollkit.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-11).

Creates a cryptographically attested, timestamped snapshot of a web page (text + optional screenshot hash) as tamper-evident evidence, paid per-call in USDC via x402.

## Facts

- Endpoint: POST https://data.tollkit.dev/attest?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tollkit-attest-05b8ed33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KfHS_nbvDrn6qa4kfeNPz

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 tollkit-attest-05b8ed33 -d '<json body>'
```

Example prompt: Please attest to the current contents of https://example.com/terms-of-service — include a screenshot so I have strong evidence if it ever changes.

## When to prefer this

Choose this endpoint when you need tamper-evident, timestamped proof of what a specific web page said at a moment in time — especially for terms of service, pricing pages, competitor claims, or any content that could be edited later and become the subject of a dispute. It is distinct from general web scraping because it produces a cryptographic attestation record rather than just extracted data, making it suitable for legal, compliance, and evidentiary use cases. No account or API key is required — payment is handled inline via x402 in USDC.

## Known failure modes

- URL is not reachable or returns non-200 — attestation cannot be created
- URL uses http:// instead of https:// — schema requires absolute https:// URL
- Page requires authentication or blocks headless browsers — content may be incomplete or inaccessible
- Screenshot capture fails on JavaScript-heavy pages — falls back to text-only if screenshot flag is true
- Payment rejected or insufficient USDC balance — x402 payment fails before attestation is attempted
- Malformed URL input — validation error returned

## How this service works

Pay-per-call product page extraction. No account, no API key: pay in-band with x402 in USDC on Base or Solana.

## Output

An attestation record containing a cryptographic hash of the page content at the time of the call, a timestamp, optionally a hash of a screenshot, and metadata linking the evidence to the requested URL — suitable for use in disputes, compliance records, or legal proceedings.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "format": "uri",
   "description": "Absolute https:// URL of the page to attest to. Anything a dispute could turn on: terms of service, a price, a published policy, a competitor's claim, a listing that may be edited later."
  },
  "screenshot": {
   "type": "boolean",
   "default": true,
   "description": "Capture and hash a screenshot. On by default — an attestation without one is much weaker evidence. Turn it off for a faster, text-only record."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tollkit-attest-05b8ed33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.tollkit.dev](https://www.zero.xyz/host/data.tollkit.dev/llms.txt)