Prove what a web page showed: verify completed work, freeze evidence for a dispute, certif
Prove what a web page showed: verify completed work, freeze evidence for a dispute, certify a page before you rely on it. Two independent observers on separate networks capture your URL at one frozen instant: byte-identical is CERTIFIED; disagreement is WITNESSED with pixel agreement and diff map. Signed manifest, RFC 3161 timestamp, permanent Arweave storage; ERC-721 certificate minted to the paying wallet. $1.00 fullpage, $0.50 viewport. Free claim polling. Rejects refund minus $0.10.
1000000 (raw units)
price
3
calls / 30d
1
unique payers
2026-08-21
updated
Provider
exhibit402.dylan-caponi.workers.dev · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x16B636328745E4e6086071B8Ff9f0C1C7DF9eB21",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"method": "POST",
"queryParams": {
"mode": "fullpage",
"url": "https://stripe.com/legal/consumer"
},
"type": "http"
},
"output": {
"example": {
"check_after_seconds": 15,
"claim_url": "https://exhibit402.dylan-caponi.workers.dev/claim/6f1c9e2a-4b7d-4c1e-9a2f-3d5e8b7a0c1d",
"job_id": "6f1c9e2a-4b7d-4c1e-9a2f-3d5e8b7a0c1d",
"note": "Poll claim_url (free) every ~15s. Resolves to {tier, ar:// links, token_id, basescan_url, hashes} or a refund per policy.",
"status": "processing"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"POST"
],
"type": "string"
},
"queryParams": {
"properties": {
"mode": {
"description": "fullpage ($1.00, default) or viewport ($0.50, first 1280x800 screen only)",
"type": "string"
},
"url": {
"description": "Public http(s) URL to capture",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"check_after_seconds": {
"type": "number"
},
"claim_url": {
"type": "string"
},
"job_id": {
"type": "string"
},
"note": {
"type": "string"
},
"status": {
"type": "string"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://exhibit402.dylan-caponi.workers.dev/capture" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://exhibit402.dylan-caponi.workers.dev/capture");
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://exhibit402.dylan-caponi.workers.dev/capture")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/13223.json, and this resource appears in /discovery/resources and /discovery/search.