Beauty & Personal Care · x402 · early usage

Signed proof of what a web page said: give a URL, get its text, screenshot and TLS deta…

Signed proof of what a web page said: give a URL, get its text, screenshot and TLS details with a timestamped cryptographic signature anyone can verify.

by attest.tollkit.dev · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls4

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Signed proof of what a web page said: give a URL, get its text, screenshot and TLS details with a timestamped cryptographic signature anyone can verify.

Tags: proof · evidence · notary · archive · screenshot · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "url": "https://fly.io/pricing"
}

Output example

{
  "attestation": {
    "algorithm": "EIP-191 personal_sign over keccak256(canonical JSON)",
    "claim": {
      "attestedBy": "0x… (signer address)",
      "capturedAt": "2026-10-04T12:00:00.000Z",
      "finalUrl": "https://fly.io/pricing/",
      "headers": {
        "content-type": "text/html; charset=utf-8"
      },
      "httpStatus": 200,
      "redirected": true,
      "remoteAddress": "IP that served the page",
      "screenshotSha256": "sha256 hex of the screenshot bytes",
      "textLength": 9312,
      "textSha256": "sha256 hex of content.text",
      "title": "Fly.io Pricing",
      "tlsIssuer": "TLS certificate issuer",
      "tlsSubject": "fly.io",
      "tlsValidFrom": "certificate start date",
      "tlsValidTo": "certificate end date",
      "url": "https://fly.io/pricing",
      "version": 1
    },
    "digest": "0x… keccak256 of the canonical claim",
    "signature": "0x… EIP-191 signature over the digest",
    "signer": "0x… (signer address)"
  },
  "content": {
    "screenshotBase64": "/9j/4AAQSkZJRgABAQ… (full JPEG, base64)",
    "screenshotMimeType": "image/jpeg",
    "text": "The page's visible text, exactly as hashed in textSha256…",
    "textTruncated": false
  },
  "verify": "https://attest.tollkit.dev/attest/verify"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/36560.json for the price and payment options.
Pay. Call GET https://attest.tollkit.dev/attest. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.05 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.05	0xBbfCE2D320dE6aB328Ba93A771c531ebFC9cE704	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.05	HBasGEGD1szEkNCWckRoZg2vZGhzt7yLSixLgSHi3gYf	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xBbfCE2D320dE6aB328Ba93A771c531ebFC9cE704",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "HBasGEGD1szEkNCWckRoZg2vZGhzt7yLSixLgSHi3gYf",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "description": "A signed, timestamped record of what a page contained. The `attestation` object is the evidence; `content` holds the bytes its hashes are over. Store the whole response — this service keeps no copy, by design, so that the record cannot be altered or withdrawn later.",
      "properties": {
        "attestation": {
          "properties": {
            "algorithm": {
              "type": "string"
            },
            "claim": {
              "description": "Exactly what was signed. Re-serialize this with sorted keys and no whitespace, keccak256 it, and you get `digest`.",
              "properties": {
                "attestedBy": {
                  "description": "Signer address, inside the signed payload.",
                  "type": "string"
                },
                "capturedAt": {
                  "description": "ISO 8601 render time.",
                  "type": "string"
                },
                "finalUrl": {
                  "description": "Where the browser ended up.",
                  "type": "string"
                },
                "headers": {
                  "description": "Lowercased, sorted; set-cookie removed.",
                  "type": "object"
                },
                "httpStatus": {
                  "type": "integer"
                },
                "redirected": {
                  "type": "boolean"
                },
                "remoteAddress": {
                  "description": "IP that served it.",
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "screenshotSha256": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "textLength": {
                  "type": "integer"
                },
                "textSha256": {
                  "type": "string"
                },
                "title": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "tlsIssuer": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "tlsSubject": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "tlsValidFrom": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "tlsValidTo": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "url": {
                  "description": "The URL as submitted.",
                  "type": "string"
                },
                "version": {
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "digest": {
              "description": "keccak256 of the canonical claim.",
              "type": "string"
            },
            "signature": {
              "description": "EIP-191 personal_sign over the digest.",
              "type": "string"
            },
            "signer": {
              "type": "string"
            }
          },
          "required": [
            "claim",
            "digest",
            "signature",
            "signer"
          ],
          "type": "object"
        },
        "content": {
          "properties": {
            "screenshotBase64": {
              "type": [
                "string",
                "null"
              ]
            },
            "screenshotMimeType": {
              "type": [
                "string",
                "null"
              ]
            },
            "text": {
              "type": "string"
            },
            "textTruncated": {
              "type": "boolean"
            }
          },
          "type": "object"
        },
        "verify": {
          "description": "Free, unauthenticated verification endpoint.",
          "type": "string"
        }
      },
      "required": [
        "attestation",
        "content"
      ],
      "type": "object"
    }
  },
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "attestation": {
      "algorithm": "string",
      "claim": {
        "attestedBy": "string",
        "capturedAt": "string",
        "finalUrl": "string",
        "headers": {},
        "httpStatus": 0,
        "redirected": true,
        "remoteAddress": "string",
        "screenshotSha256": "string",
        "textLength": 0,
        "textSha256": "string",
        "title": "string",
        "tlsIssuer": "string",
        "tlsSubject": "string",
        "tlsValidFrom": "string",
        "tlsValidTo": "string",
        "url": "string",
        "version": 0
      },
      "digest": "string",
      "signature": "string",
      "signer": "string"
    },
    "content": {
      "screenshotBase64": "string",
      "screenshotMimeType": "string",
      "text": "string",
      "textTruncated": true
    },
    "verify": "string"
  }
}

Examples

curl

curl "https://attest.tollkit.dev/attest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://attest.tollkit.dev/attest");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://attest.tollkit.dev/attest")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: attest.tollkit.dev
Endpoint: https://attest.tollkit.dev/attest
Machine-readable: /resources/36560.json