ToolVet
15trust / 100

Stablecoin Market Cap

by Vextorium in Markets & finance

x402 APIFailing, checked 2 h ago

Total stablecoin market capitalization (crypto's dry powder) with series, 7/30/90/365-day change and split by peg currency (USD, EUR...). Live from DefiLlama.

POST
https://api.vextorium.com/v1/stablecoin-market-cap
Price
$0.004
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 2 h ago: Amount "0.004" is not in atomic token units

Status and outage history · Atom feed

How to call it

POST https://api.vextorium.com/v1/stablecoin-market-cap

Each call costs $0.004 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.

POST https://api.vextorium.com/v1/stablecoin-market-cap
content-type: application/json

{
  "days": 90
}

Parameters

ParameterTypeRequiredDescription
daysintegerNoDays of series (7-1825, default 365)

Example response

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

Example response, 38 lines
{
  "by_currency_usd": {
    "ARS": 8965691,
    "AUD": 13352736,
    "CAD": 4071075,
    "CHF": 44217690,
    "EUR": 805055436,
    "GBP": 29577409,
    "JPY": 158008707,
    "MXN": 1474061,
    "PHP": 3607640,
    "REAL": 25680586,
    "RUB": 560457250,
    "SGD": 13129144,
    "TRY": 6073110,
    "USD": 311477933885,
    "VAR": 12245301
  },
  "change_pct": {
    "30d": 1.41,
    "365d": 4.55,
    "7d": 0.99,
    "90d": 0.99
  },
  "date": "2026-10-02",
  "market_cap_usd": 313165264074,
  "series": [
    {
      "date": "2026-07-04",
      "usd": 310089527005
    },
    {
      "date": "2026-07-05",
      "usd": 309998372233
    }
  ],
  "source": "DefiLlama Stablecoins"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/v1/stablecoin-market-cap' \
  -H 'content-type: application/json' \
  --data-raw '{"days":90}'

# 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://api.vextorium.com/v1/stablecoin-market-cap' \
  -H 'content-type: application/json' \
  --data-raw '{"days":90}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fv1%2Fstablecoin-market-cap&method=POST
const res = await pay("https://api.vextorium.com/v1/stablecoin-market-cap", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "days": 90
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.vextorium.com/v1/stablecoin-market-cap",
        json={
            "days": 90,
        },
    )
    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
2 h agoAmount "0.004" is not in atomic token units40298 ms$0.004
7 h agoAmount "0.004" is not in atomic token units402228 ms$0.004
12 h agoAmount "0.004" is not in atomic token units402109 ms$0.004
17 h agoAmount "0.004" is not in atomic token units40292 ms$0.004
22 h agoAmount "0.004" is not in atomic token units40293 ms$0.004
Show 10 older checks
26 h agoAmount "0.004" is not in atomic token units40284 ms$0.004
31 h agoAmount "0.004" is not in atomic token units402124 ms$0.004
36 h agoAmount "0.004" is not in atomic token units40283 ms$0.004
40 h agoAmount "0.004" is not in atomic token units402144 ms$0.004
44 h agoAmount "0.004" is not in atomic token units402125 ms$0.004
2 days agoAmount "0.004" is not in atomic token units40296 ms$0.004
2 days agoAmount "0.004" is not in atomic token units40278 ms$0.004
2 days agoAmount "0.004" is not in atomic token units402101 ms$0.004
3 days agoAmount "0.004" is not in atomic token units402320 ms$0.004
3 days agoAmount "0.004" is not in atomic token units40273 ms$0.004