ToolVet
15trust / 100

Crypto Correlation

by Vextorium in Onchain & crypto

x402 APIFailing, checked 13 min ago

Correlation matrix of daily returns for 2-8 crypto assets over up to 2 years, with each asset's return and annualized volatility and the least correlated pair. For diversification and hedging. Prices from DefiLlama.

POST
https://api.vextorium.com/v1/crypto-correlation
Price
$0.005
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
13 min ago, next in 53 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 13 min ago: Expected HTTP 402, got 503

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.vextorium.com/v1/crypto-correlation

Each call costs $0.005 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/crypto-correlation
content-type: application/json

{
  "coins": "BTC,ETH,SOL",
  "days": 90
}

Parameters

ParameterTypeRequiredDescription
coinsstringYesComma-separated, e.g. BTC,ETH,SOL
daysintegerNo14-730, default 90

Example response

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

Example response, 40 lines
{
  "assets": {
    "BTC": {
      "annual_volatility_pct": 39.23,
      "return_pct": 36.32
    },
    "ETH": {
      "annual_volatility_pct": 48.08,
      "return_pct": 51.64
    },
    "SOL": {
      "annual_volatility_pct": 54.06,
      "return_pct": 46.61
    }
  },
  "correlation": {
    "BTC": {
      "BTC": 1,
      "ETH": 0.881,
      "SOL": 0.824
    },
    "ETH": {
      "BTC": 0.881,
      "ETH": 1,
      "SOL": 0.767
    },
    "SOL": {
      "BTC": 0.824,
      "ETH": 0.767,
      "SOL": 1
    }
  },
  "days": 91,
  "least_correlated_pair": {
    "a": "ETH",
    "b": "SOL",
    "correlation": 0.767
  },
  "note": "1 = move together, 0 = unrelated, -1 = opposite. Price source: DefiLlama."
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

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/crypto-correlation' \
  -H 'content-type: application/json' \
  --data-raw '{"coins":"BTC,ETH,SOL","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/crypto-correlation' \
  -H 'content-type: application/json' \
  --data-raw '{"coins":"BTC,ETH,SOL","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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fv1%2Fcrypto-correlation&method=POST
const res = await pay("https://api.vextorium.com/v1/crypto-correlation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "coins": "BTC,ETH,SOL",
    "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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
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/crypto-correlation",
        json={
            "coins": "BTC,ETH,SOL",
            "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
13 min agoExpected HTTP 402, got 503503143 ms-
5 h agoAmount "0.005" is not in atomic token units40286 ms$0.005
11 h agoAmount "0.005" is not in atomic token units40290 ms$0.005
15 h agoAmount "0.005" is not in atomic token units40285 ms$0.005
20 h agoAmount "0.005" is not in atomic token units40285 ms$0.005
Show 10 older checks
25 h agoAmount "0.005" is not in atomic token units402137 ms$0.005
30 h agoAmount "0.005" is not in atomic token units402265 ms$0.005
35 h agoAmount "0.005" is not in atomic token units40281 ms$0.005
39 h agoAmount "0.005" is not in atomic token units40282 ms$0.005
44 h agoAmount "0.005" is not in atomic token units40295 ms$0.005
2 days agoAmount "0.005" is not in atomic token units402106 ms$0.005
2 days agoAmount "0.005" is not in atomic token units402122 ms$0.005
2 days agoAmount "0.005" is not in atomic token units40298 ms$0.005
3 days agoAmount "0.005" is not in atomic token units402257 ms$0.005
3 days agoAmount "0.005" is not in atomic token units40289 ms$0.005