ToolVet
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Arc Agent Watch

by APEX Arc agent uptime check in Documents & files

x402 APIPassing, checked 3 h ago

Which agents registered on Arc actually answer. Every endpoint every agent lists in its ERC-8004 registration file (web, A2A, MCP, x402, the file itself) is called once an hour through an address-checked fetcher: A2A cards are read, MCP servers get the initialize handshake, x402 paywalls are parsed the way a standard client would and checked against the on-chain EIP-712 domains of USDC and EURC on Arc (a wrong domain means every signature fails - we name it).

GET https://apexfaucet.xyz/api/x402/arc-agent-watch

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
62 ms typical, 62 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://apexfaucet.xyz/api/x402/arc-agent-watch"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapexfaucet.xyz%2Fapi%2Fx402%2Farc-agent-watch
const res = await pay("https://apexfaucet.xyz/api/x402/arc-agent-watch");
console.log(await res.json());

Example output

{
  "data": {
    "ageSeconds": 785,
    "agents": [],
    "chain": "arc",
    "chainId": 5042,
    "hour": "2026-10-06T04",
    "lastRound": {},
    "measuredAt": "2026-10-06T04:56:47.061Z",
    "method": {},
    "ok": true,
    "registry": "0x8004A169FB4a3325136EB2…",
    "summary": {},
    "tier": "full"
  },
  "ok": true,
  "paid": 0.004
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed40262 ms$0.004
8 h agoPassed40262 ms$0.004