treasurydirect

What it is

A zero-dependency TypeScript client for the US Treasury's public auction and debt endpoints, with no API key. It lists recent, upcoming, and announced auctions, fetches one security by CUSIP and issue date, searches reopenings, and reads Debt to the Penny as the latest total or over a date range, turning text fields into numbers. Fixed-income developers building a bond ladder, a rates view, or a debt dashboard can call it with their own fetch in tests. Only the commonly used security fields are typed in full, the public-versus-intragovernmental split is missing on the earliest rows, and a broad search with no page size can return a very large payload.