ToolVet
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Treasury Yields

by Official Macro & FX Data in Markets & finance

x402 APIPassing, checked 3 h ago

Use when an agent needs US government bond yields, a risk-free rate or the yield curve (e.g. 2Y/10Y spread, recession signal, discounting): official US Treasury daily par yield curve, 1 month to 30 years, latest or any day since 1990 (weekends/holidays return the previous business day). Includes 10Y-2Y and 10Y-3M spreads. Source named in every answer. Bad input: HTTP 400 before payment; outage is not charged.

GET
https://x402-apis.pages.dev/v1/treasury-yields
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
60 ms
569 ms slowest 5%
Last check
Passed
3 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://x402-apis.pages.dev/v1/treasury-yields

Each call costs $0.002 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://x402-apis.pages.dev/v1/treasury-yields?date=2026-10-01

Parameters

ParameterTypeRequiredDescription
datestringNoDay as YYYY-MM-DD (1990-01-02 or later). Default: latest published curve.

Example response

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

{
  "date": "2026-10-01",
  "retrievedAt": "2026-10-13T15:10:00.000Z",
  "source": "U.S. Department of the Treasury – Daily Treasury Par Yield Curve Rates",
  "spreadsPct": {
    "10Y-2Y": 0.46,
    "10Y-3M": 1.07
  },
  "yieldsPct": {
    "10Y": 5.24,
    "1M": 4.06,
    "1Y": 4.44,
    "2Y": 4.78,
    "30Y": 5.61,
    "3M": 4.17,
    "5Y": 5.01,
    "6M": 4.27
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://x402-apis.pages.dev/v1/treasury-yields?date=2026-10-01'

# 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://x402-apis.pages.dev/v1/treasury-yields?date=2026-10-01' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402-apis.pages.dev%2Fv1%2Ftreasury-yields
const res = await pay("https://x402-apis.pages.dev/v1/treasury-yields?date=2026-10-01");
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://x402-apis.pages.dev/v1/treasury-yields?date=2026-10-01")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402315 ms$0.002
8 h agoPassed40244 ms$0.002
12 h agoPassed40257 ms$0.002
16 h agoPassed40251 ms$0.002
20 h agoPassed402411 ms$0.002
Show 10 older checks
24 h agoPassed40252 ms$0.002
29 h agoPassed40256 ms$0.002
33 h agoPassed402507 ms$0.002
37 h agoPassed40261 ms$0.002
41 h agoPassed402546 ms$0.002
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3 days agoPassed40244 ms$0.002