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Tollkit Attest
x402
Tollkit Attest is a paid API for AI agents from chain.tollkit.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-11).
Creates a timestamped, cryptographic attestation of a web page's content (text and optional screenshot hash) for evidentiary or audit purposes.
Price / call$0.25
Success—
StatusUnknown
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
The agent receives a signed attestation record containing a timestamp, a hash of the page's text content, and (if screenshot=true) a hash of a visual screenshot — together forming a tamper-evident, dispute-ready proof of what the page contained at the moment of the call.
Example use cases
Preserve competitor pricing claim
“Go to https://rival.com/pricing and attest to that page with a screenshot — I want a verifiable record of their published price before their sale ends.”
Archive terms of service before signing
“Please attest to https://vendor.com/terms-of-service with a screenshot so I have a timestamped proof of exactly what the terms said when we agreed to them.”
Document a policy page for compliance
“Create an attestation of https://partner.com/privacy-policy including a screenshot — I need a cryptographic record for our compliance audit showing what their policy said today.”
Technical details
Endpoint
POSThttps://chain.tollkit.dev/attest?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographic, dispute-ready record of a specific web page's content at a point in time — especially for legal evidence, compliance audits, or preserving claims that may later be edited or deleted. Prefer it over simple web scraping when verifiability and tamper-evidence matter. The x402 pay-per-call model means no account setup is needed, making it ideal for ad-hoc or automated agent workflows.
Side effects
- URL is not accessible or returns a non-200 status — attestation fails with an error
- URL uses HTTP instead of HTTPS — rejected by schema validation
- Payment not received or insufficient USDC — 402 Payment Required returned
- Screenshot capture times out on a slow-loading page — may return text-only record or error
- Page requires authentication and returns a login wall — attestation captures the login page, not the target content
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | 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 | boolean | 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. |
Tags
x402
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