treasurydirect

Typed, zero-dependency client for the US Treasury's free public APIs at treasurydirect.gov — auction results, upcoming and announced auctions, security lookups by CUSIP, and Debt to the Penny. No API key required.

npm install treasurydirect

Why

The Treasury publishes remarkably rich data for free — every auction's high yield, bid-to-cover, price per 100, accrued interest, dealer allocations, plus the national debt to the literal penny — and npm had no client for it. If you're building a bond ladder tool, a rates dashboard, or a debt-ceiling story, this is the data source.

import { auctionedSecurities, currentDebt, getSecurity, num } from "treasurydirect";

const notes = await auctionedSecurities({ type: "Note", days: 30 });
num(notes[0].highYield);       // 4.58
num(notes[0].bidToCoverRatio); // 2.59

const note = await getSecurity("91282CQQ7", "2026-07-15");
num(note.accruedInterestPer1000); // 7.25204

const debt = await currentDebt();
debt.totalDebt; // 39_414_179_016_130.09

API

All functions take an optional final options argument: { fetch?, baseUrl? } (inject fetch for tests/proxies).

• auctionedSecurities({ type?, days? }) — recent auction results. type: "Bill" | "Note" | "Bond" | "CMB" | "TIPS" | "FRN"; days: look-back window.
• upcomingAuctions() — scheduled auctions.
• announcedSecurities({ type?, days? }) — announced auction terms.
• getSecurity(cusip, issueDate) — one security; issueDate as "YYYY-MM-DD" or Date.
• searchSecurities(params) — pass-through search, e.g. { cusip } returns the original issue and every reopening.
• currentDebt() / searchDebt({ startDate, endDate }) — Debt to the Penny, latest or historical.
• num(field) — the TA_WS API returns every security field as a string ("" = not applicable); num converts to number | null.

Failures throw TreasuryDirectError with status and url. Security records are typed for the ~30 most useful fields with an index signature for the rest.

The mocked test suite runs offline; npm run smoke exercises the live API.

Related

Part of a small fixed-income toolkit: 32nds (format those auction prices as Treasury quotes) · accrued-interest (reproduce accruedInterestPer1000 yourself) · day-count · sifma-holidays (bond-market calendar).

Author

Built by Moshe Malka — engineering leader in New York City. Studio work at Quentin.Code.

MIT © Moshe Malka