ToolVet
80trust / 100

Defi Stablecoins

by SiteCheck in Onchain & crypto

x402 APIPassing, checked 1 h ago

Stablecoins tracked by DefiLlama: circulating supply, peg type and mechanism, price, and the chains each one runs on. With symbol, that coin; without it the 50 largest. Attribution: Data: DefiLlama. Information only, not financial advice.

GET
https://api.sitecheck-api.workers.dev/api/defi/stablecoins
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
59 ms
3.1 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

How to call it

GET https://api.sitecheck-api.workers.dev/api/defi/stablecoins

Each call costs $0.001 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://api.sitecheck-api.workers.dev/api/defi/stablecoins?symbol=USDC

Parameters

ParameterTypeRequiredDescription
symbolstringNoSymbol, e.g. USDC (optional)

Example response

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

{
  "attribution": "Data: DefiLlama",
  "checkedAt": "2026-10-14T04:49:21.903Z",
  "count": 1,
  "disclaimer": "Information only, not financial advice.",
  "source": "DefiLlama stablecoins API (includePrices), trimmed and cached for 30 minutes",
  "stablecoins": [
    {
      "chains": [
        "Manta",
        "RISE"
      ],
      "circulatingUsd": 73123826903,
      "name": "USD Coin",
      "pegMechanism": "fiat-backed",
      "pegType": "peggedUSD",
      "price": 0.999847,
      "symbol": "USDC"
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/defi/stablecoins?symbol=USDC'

# 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://api.sitecheck-api.workers.dev/api/defi/stablecoins?symbol=USDC' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fdefi%2Fstablecoins
const res = await pay("https://api.sitecheck-api.workers.dev/api/defi/stablecoins?symbol=USDC");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/defi/stablecoins?symbol=USDC")
    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
1 h agoPassed40273 ms$0.001
6 h agoPassed40281 ms$0.001
10 h agoPassed40245 ms$0.001
14 h agoPassed4023.1 s$0.001
18 h agoPassed40259 ms$0.001
Show 2 older checks
23 h agoPassed40248 ms$0.001
27 h agoPassed40246 ms$0.001