Treasury Auctions

{
  "auctions": [
    {
      "accepted_usd": null,
      "auction_date": "2026-10-22",
      "bid_to_cover": null,
      "coupon_pct": null,
      "cusip": "91282CRR4",
      "high_discount_rate_pct": null,
      "high_yield_pct": null,
      "issue_date": "2026-10-30",
      "maturity_date": "2031-10-15",
      "offering_amount_usd": 26000000000,
      "price_per_100": null,
      "security_type": "Note",
      "status": "scheduled",
      "tendered_usd": null,
      "term": "5-Year"
    },
    {
      "accepted_usd": 39926321900,
      "auction_date": "2026-10-07",
      "bid_to_cover": 2.77,
      "coupon_pct": 4.625,
      "cusip": "91282CRF0",
      "high_discount_rate_pct": null,
      "high_yield_pct": 5.3,
      "issue_date": "2026-10-15",
      "maturity_date": "2036-08-15",
      "offering_amount_usd": 39000000000,
      "price_per_100": 94.864261,
      "security_type": "Note",
      "status": "results announced",
      "tendered_usd": 108995289900,
      "term": "9-Year 10-Month"
    },
    {
      "accepted_usd": 59377561000,
      "auction_date": "2026-10-06",
      "bid_to_cover": 2.62,
      "coupon_pct": 4.875,
      "cusip": "91282CRQ6",
      "high_discount_rate_pct": null,
      "high_yield_pct": 4.932,
      "issue_date": "2026-10-15",
      "maturity_date": "2029-10-15",
      "offering_amount_usd": 58000000000,
      "price_per_100": 99.84284,
      "security_type": "Note",
      "status": "results announced",
      "tendered_usd": 153096023500,
      "term": "3-Year"
    },
    {
      "accepted_usd": 50624250500,
      "auction_date": "2026-09-24",
      "bid_to_cover": 2.42,
      "coupon_pct": 5,
      "cusip": "91282CRM5",
      "high_discount_rate_pct": null,
      "high_yield_pct": 5.085,
      "issue_date": "2026-09-30",
      "maturity_date": "2033-09-30",
      "offering_amount_usd": 44000000000,
      "price_per_100": 99.504596,
      "security_type": "Note",
      "status": "results announced",
      "tendered_usd": 113215981000,
      "term": "7-Year"
    },
    {
      "accepted_usd": 80538513000,
      "auction_date": "2026-09-23",
      "bid_to_cover": 2.21,
      "coupon_pct": 5,
      "cusip": "91282CRN3",
      "high_discount_rate_pct": null,
      "high_yield_pct": 5.033,
      "issue_date": "2026-09-30",
      "maturity_date": "2031-09-30",
      "offering_amount_usd": 70000000000,
      "price_per_100": 99.855714,
      "security_type": "Note",
      "status": "results announced",
      "tendered_usd": 165388603000,
      "term": "5-Year"
    }
  ],
  "count": 5,
  "source": "US Treasury Fiscal Data, Treasury Securities Auctions (public domain)",
  "type": "Note"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/treasury/auctions?limit=5&type=Note'

# 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/treasury/auctions?limit=5&type=Note' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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%2Ftreasury%2Fauctions
const res = await pay("https://saylorinnovations.com/api/treasury/auctions?limit=5&type=Note");
console.log(res.status, await res.text());

# 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/treasury/auctions?limit=5&type=Note")
    print(res.status_code, res.text)