ToolVet
75trust / 100

Econ Series

by Saylor Innovations Data Desk in Markets & finance

x402 APIPassing, checked 2 h ago

Economic data series - latest value, change, year-over-year, window high and low and recent history for any FRED series such as unemployment, CPI, fed funds or GDP

GET
https://saylorinnovations.com/api/econ/series
Price
$0.01
per call in USDC
Uptime
100%
last 30 days
Response time
533 ms
620 ms slowest 5%
Last check
Passed
2 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 · Watch with other listings

How to call it

GET https://saylorinnovations.com/api/econ/series

Each call costs $0.01 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://saylorinnovations.com/api/econ/series?id=UNRATE&limit=12

Parameters

ParameterTypeRequiredDescription
idstringYesFRED series id, e.g. UNRATE, CPIAUCSL, FEDFUNDS, DGS10, GDPC1, MORTGAGE30US
limitstringNooptional recent observations to return, 1-200, default 24

Example response

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

Example response, 84 lines
{
  "change": 0.1,
  "change_pct": 2.44,
  "frequency": "monthly",
  "latest": {
    "date": "2026-09-01",
    "value": 4.2
  },
  "observations": [
    {
      "date": "2025-09-01",
      "value": 4.4
    },
    {
      "date": "2025-11-01",
      "value": 4.5
    },
    {
      "date": "2025-12-01",
      "value": 4.4
    },
    {
      "date": "2026-01-01",
      "value": 4.3
    },
    {
      "date": "2026-02-01",
      "value": 4.4
    },
    {
      "date": "2026-03-01",
      "value": 4.3
    },
    {
      "date": "2026-04-01",
      "value": 4.3
    },
    {
      "date": "2026-05-01",
      "value": 4.3
    },
    {
      "date": "2026-06-01",
      "value": 4.2
    },
    {
      "date": "2026-07-01",
      "value": 4.1
    },
    {
      "date": "2026-08-01",
      "value": 4.1
    },
    {
      "date": "2026-09-01",
      "value": 4.2
    }
  ],
  "observations_in_window": 35,
  "previous": {
    "date": "2026-08-01",
    "value": 4.1
  },
  "series_id": "UNRATE",
  "source": "FRED, Federal Reserve Bank of St. Louis",
  "title": "Unemployment rate",
  "units": "%",
  "window_average": 4.137143,
  "window_high": {
    "date": "2025-11-01",
    "value": 4.5
  },
  "window_low": {
    "date": "2023-11-01",
    "value": 3.7
  },
  "window_start": "2023-10-01",
  "year_ago": {
    "date": "2025-09-01",
    "value": 4.4
  },
  "yoy_change": -0.2,
  "yoy_pct": -4.55
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/econ/series?id=UNRATE&limit=12'

# 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://saylorinnovations.com/api/econ/series?id=UNRATE&limit=12' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fecon%2Fseries
const res = await pay("https://saylorinnovations.com/api/econ/series?id=UNRATE&limit=12");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/econ/series?id=UNRATE&limit=12")
    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 agoPassed402533 ms$0.01
6 h agoPassed402465 ms$0.01
11 h agoPassed402620 ms$0.01