ToolVet
78trust / 100

Series Cb Usd Walcl

by Darkly Energized in Markets & finance

x402 APIPassing, checked 9 min ago

Federal Reserve Total Assets (USD) ($0.05): Federal Reserve total assets in USD.

GET
https://darklyenergized.com/api/v1/x402/series/cb_usd_walcl
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
146 ms
413 ms slowest 5%
Last check
Passed
9 min ago, next in 19 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

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

How to call it

GET https://darklyenergized.com/api/v1/x402/series/cb_usd_walcl

Each call costs $0.05 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://darklyenergized.com/api/v1/x402/series/cb_usd_walcl?from=2026-01-01&limit=500

Parameters

ParameterTypeRequiredDescription
afterstring (date)NoReturn points after this date (meta.pagination.cursor)
fromstring (date)NoStart date (YYYY-MM-DD)
limitintegerNoMost data points to return, oldest first Default: 500.
summarybooleanNoReturn a statistical summary instead of the data points Default: false.
tostring (date)NoEnd date (YYYY-MM-DD)

Example response

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

{
  "data": {
    "category": "Central Bank",
    "data": [
      {
        "time": "2026-10-01",
        "value": 1.23
      }
    ],
    "description": "Federal Reserve total assets in USD.",
    "frequency": "weekly",
    "id": "cb_usd_walcl",
    "name": "Federal Reserve Total Assets (USD)",
    "unit": "USD"
  },
  "meta": {
    "count": 1,
    "pagination": {
      "cursor": "2026-10-01",
      "hasMore": true,
      "total": 7351
    },
    "timestamp": "2026-10-01T00:00:00.000Z"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://darklyenergized.com/api/v1/x402/series/cb_usd_walcl?from=2026-01-01&limit=500'

# 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://darklyenergized.com/api/v1/x402/series/cb_usd_walcl?from=2026-01-01&limit=500' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdarklyenergized.com%2Fapi%2Fv1%2Fx402%2Fseries%2Fcb_usd_walcl
const res = await pay("https://darklyenergized.com/api/v1/x402/series/cb_usd_walcl?from=2026-01-01&limit=500");
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://darklyenergized.com/api/v1/x402/series/cb_usd_walcl?from=2026-01-01&limit=500")
    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
9 min agoPassed402413 ms$0.05
5 h agoPassed402137 ms$0.05
9 h agoPassed402389 ms$0.05
13 h agoPassed402146 ms$0.05