ToolVet
78trust / 100

Trust Quote Freshness Guard

by Quote Freshness Guard in Security & trust

x402 APIPassing, checked 31 min ago

Reject x402 quotes that cannot remain valid through authorization and retry

POST https://phion.systems/v1/paid/trust/quote-freshness-guard

Last 30 days

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

Uptime
100%
Response time
142 ms typical, 596 ms slowest 5%
Last check
31 min ago
Next check
any minute now

How to call it

POST https://phion.systems/v1/paid/trust/quote-freshness-guard

Each call costs $0.002 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

The listing has no example input.

POST https://phion.systems/v1/paid/trust/quote-freshness-guard
content-type: application/json

{}

Example response

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

{
  "assessment": {
    "confidence": 0.5,
    "risk_band": "review"
  },
  "receipt": {
    "signature": "base64url"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://phion.systems/v1/paid/trust/quote-freshness-guard' \
  -H 'content-type: application/json' \
  --data-raw '{}'

# 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://phion.systems/v1/paid/trust/quote-freshness-guard' \
  -H 'content-type: application/json' \
  --data-raw '{}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fphion.systems%2Fv1%2Fpaid%2Ftrust%2Fquote-freshness-guard&method=POST
const res = await pay("https://phion.systems/v1/paid/trust/quote-freshness-guard", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({}),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://phion.systems/v1/paid/trust/quote-freshness-guard",
        json={},
    )
    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
31 min agoPassed402141 ms$0.002
4 h agoPassed402143 ms$0.002
8 h agoPassed402596 ms$0.002
12 h agoPassed402136 ms$0.002
16 h agoPassed402568 ms$0.002
20 h agoPassed402139 ms$0.002
24 h agoPassed402141 ms$0.002
28 h agoPassed402142 ms$0.002
31 h agoPassed402139 ms$0.002
35 h agoPassed402156 ms$0.002
38 h agoPassed402138 ms$0.002
41 h agoPassed402150 ms$0.002
45 h agoPassed402151 ms$0.002
2 days agoPassed402857 ms$0.002
2 days agoPassed402139 ms$0.002