U.S. Treasury Fiscal Data API

by fiscaldata.treasury.gov

Finance Added on November 9th, 2026

What it does

The Fiscal Data API from the U.S. Treasury gives federal finance data such as debt, revenue, spending, interest rates and savings bonds, for example to chart the national debt. Requests are GET calls that answer in JSON, XML or CSV. Free, no key needed, and the data may be reused, also commercially.

API
CSV
HTTP-GET
JSON
REST
XML

At a glance

API key: Not needed · More APIs with no key
Pricing: Free, no key needed, and the data may be reused, also commercially.
Commercial use: Allowed on the free plan
From the browser: Yes (CORS)
Formats: JSON, XML, CSV
Interface: REST, HTTP-GET
Provider: fiscaldata.treasury.gov

More information: https://fiscaldata.treasury.gov/api-documentation/

Is this your service? Show that it is listed

Put this badge on your website or in your README; it links to this page. About the badge

HTML

<a href="https://free-web-services.com/web-services/unit-convertors/fiinance/us-treasury-fiscal-data-api.html"><img src="https://free-web-services.com/badge.svg" width="208" height="44" alt="Listed on Free Web Services" /></a>

Markdown

[![Listed on Free Web Services](https://free-web-services.com/badge.svg)](https://free-web-services.com/web-services/unit-convertors/fiinance/us-treasury-fiscal-data-api.html)

Example request

curl

curl 'https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/avg_interest_rates?page[size]=1'

JavaScript

const response = await fetch("https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/avg_interest_rates?page[size]=1");
const data = await response.json();
console.log(data);

Python

import requests

response = requests.get(
    "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/avg_interest_rates?page[size]=1",
    timeout=30,
)
print(response.json())

The JavaScript works in a web page as well as in Node.js 18 or newer.