75trust / 100

Archive Full

by pulse.chainverdict.xyz in Onchain & crypto

x402 APIPassing, checked 13 min ago

The complete daily observation history of third-party x402 endpoints since first observation, with the Merkle root of each day. Each root is chained to the previous day and timestamped into Bitcoin via OpenTimestamps, so the archive can be verified as having existed on the stated dates rather than assembled later. The most recent 7 days are free at /v1/datasets/day/{day}; the manifest and verification method are free at /v1/datasets/manifest.

GET
https://pulse.chainverdict.xyz/v1/archive/full
Price
$0.5
per call in USDC
Uptime
100%
last 30 days
Response time
606 ms
783 ms slowest 5%
Last check
Passed
13 min ago, next in 16 min

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

GET https://pulse.chainverdict.xyz/v1/archive/full

Each call costs $0.5 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.

GET https://pulse.chainverdict.xyz/v1/archive/full

Example response

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

{
  "anchors": {
    "daysWithTimestampProof": 18
  },
  "days": [],
  "daysAvailable": 18,
  "observingSince": "2026-08-07"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.5.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://pulse.chainverdict.xyz/v1/archive/full'

# 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 - 'https://pulse.chainverdict.xyz/v1/archive/full' \
  | 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 $0.5 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.5" });
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 $0.5 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpulse.chainverdict.xyz%2Fv1%2Farchive%2Ffull
const res = await pay("https://pulse.chainverdict.xyz/v1/archive/full");
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 $0.5 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.5"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://pulse.chainverdict.xyz/v1/archive/full")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
13 min agoPassed402725 ms$0.5
5 h agoPassed402394 ms$0.5
10 h agoPassed402315 ms$0.5
15 h agoPassed402324 ms$0.5
20 h agoPassed402671 ms$0.5
Show 10 older checks
25 h agoPassed402275 ms$0.5
30 h agoPassed402657 ms$0.5
34 h agoPassed402684 ms$0.5
38 h agoPassed402620 ms$0.5
43 h agoPassed402678 ms$0.5
47 h agoPassed402297 ms$0.5
2 days agoPassed402301 ms$0.5
2 days agoPassed402720 ms$0.5
3 days agoPassed402723 ms$0.5
3 days agoPassed402611 ms$0.5