Stablecoin peg monitor

Live $1-peg deviation for the top USD stablecoins (USDT, USDC, USDS, DAI, USDe, PYUSD, USDD, TUSD, FDUSD by default, or pass your own list): current price, deviation in basis points, 24h high/low, worst 24h deviation, market cap, and an on-peg / stressed / depegged status. Backed by CoinGecko's public API.

Input

Example output

{
  "peg": "USD $1.00",
  "count": 2,
  "coins": [
    {
      "id": "tether",
      "symbol": "USDT",
      "name": "Tether",
      "price": 0.998868,
      "deviationBps": -11.32,
      "high24h": 0.999372,
      "low24h": 0.998674,
      "maxDeviation24hBps": 13.26,
      "marketCap": 184092462233,
      "status": "on-peg"
    },
    {
      "id": "usd-coin",
      "symbol": "USDC",
      "name": "USDC",
      "price": 0.999819,
      "deviationBps": -1.81,
      "high24h": 0.999923,
      "low24h": 0.99953,
      "maxDeviation24hBps": 4.7,
      "marketCap": 73033499074,
      "status": "on-peg"
    }
  ]
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/stablecoin-peg"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/stablecoin-peg");

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