ToolVet
75trust / 100

Capture

by exhibit402.dylan-caponi.workers.dev in Onchain & crypto

x402 APIPassing, checked 1 h ago

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.

POST
https://exhibit402.dylan-caponi.workers.dev/capture
Price
$1.00
per call in USDC
Uptime
100%
last 30 days
Response time
783 ms
1.4 s slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://exhibit402.dylan-caponi.workers.dev/capture

Each call costs $1.00 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://exhibit402.dylan-caponi.workers.dev/capture
content-type: application/json

{
  "mode": "fullpage",
  "url": "https://en.wikipedia.org/wiki/SHA-2"
}

Parameters

ParameterTypeRequiredDescription
modestringNofullpage ($1.00, default) or viewport ($0.50, first 1280x800 screen only)
urlstringYesPublic http(s) URL to capture

Example response

The provider's example. We can't check it without paying.

{
  "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"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $1.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://exhibit402.dylan-caponi.workers.dev/capture' \
  -H 'content-type: application/json' \
  --data-raw '{"mode":"fullpage","url":"https://en.wikipedia.org/wiki/SHA-2"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://exhibit402.dylan-caponi.workers.dev/capture' \
  -H 'content-type: application/json' \
  --data-raw '{"mode":"fullpage","url":"https://en.wikipedia.org/wiki/SHA-2"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$1" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fexhibit402.dylan-caponi.workers.dev%2Fcapture&method=POST
const res = await pay("https://exhibit402.dylan-caponi.workers.dev/capture", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "mode": "fullpage",
    "url": "https://en.wikipedia.org/wiki/SHA-2"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://exhibit402.dylan-caponi.workers.dev/capture",
        json={
            "mode": "fullpage",
            "url": "https://en.wikipedia.org/wiki/SHA-2",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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1 h agoPassed402888 ms$1.00
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17 h agoPassed4021.4 s$1.00
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46 h agoPassed402630 ms$1.00
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3 days agoPassed402783 ms$1.00