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usfiscaldata

Query the U.S. Treasury Fiscal Data REST API for federal financial data. No API key required. Use for national debt (Debt to the Penny), Daily Treasury Statements, Monthly Treasury Statements, Treasury securities auctions, interest rates, foreign exchange rates, savings bonds, or U.S. government revenue and spending statistics.

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U.S. Treasury Fiscal Data API

Free, open REST API from the U.S. Department of the Treasury for federal financial data. No API key or registration required.

Base URL: https://api.fiscaldata.treasury.gov/services/api/fiscal_service

Browse 54 datasets and 179 data tables via the dataset search. Verify endpoint paths on each dataset's API Quick Guide — paths change over time.

Installation

uv pip install requests pandas

Quick Start

import requests
import pandas as pd

BASE_URL = "https://api.fiscaldata.treasury.gov/services/api/fiscal_service"

# Get the current national debt (Debt to the Penny)
resp = requests.get(f"{BASE_URL}/v2/accounting/od/debt_to_penny", params={
    "sort": "-record_date",
    "page[size]": 1
})
data = resp.json()["data"][0]
print(f"Total public debt as of {data['record_date']}: ${float(data['tot_pub_debt_out_amt']):,.0f}")
# Get Treasury exchange rates for recent quarters
resp = requests.get(f"{BASE_URL}/v1/accounting/od/rates_of_exchange", params={
    "fields": "country_currency_desc,exchange_rate,record_date",
    "filter": "record_date:gte:2024-01-01",
    "sort": "-record_date",
    "page[size]": 100
})
df = pd.DataFrame(resp.json()["data"])

Authentication

None required. The API is fully open and free.

Core Parameters

ParameterExampleDescription
fields=fields=record_date,tot_pub_debt_out_amtSelect specific columns
filter=filter=record_date:gte:2024-01-01Filter records
sort=sort=-record_dateSort (prefix - for descending)
format=format=jsonOutput format: json, csv, xml
page[size]=page[size]=100Records per page (default 100)
page[number]=page[number]=2Page index (starts at 1)

Filter operators: lt, lte, gt, gte, eq, in

# Multiple filters separated by comma
"filter=country_currency_desc:in:(Canada-Dollar,Mexico-Peso),record_date:gte:2024-01-01"

Key Datasets & Endpoints

Debt

DatasetEndpointFrequency
Debt to the Penny/v2/accounting/od/debt_to_pennyDaily
Historical Debt Outstanding/v2/accounting/od/debt_outstandingAnnual
Schedules of Federal Debt/v1/accounting/od/schedules_fed_debtMonthly

Daily & Monthly Statements

DatasetEndpointFrequency
DTS Operating Cash Balance/v1/accounting/dts/operating_cash_balanceDaily
DTS Deposits & Withdrawals/v1/accounting/dts/deposits_withdrawals_operating_cashDaily
Monthly Treasury Statement (MTS)/v1/accounting/mts/mts_table_1 (18 tables — see datasets-fiscal.md)Monthly

Interest Rates & Exchange

DatasetEndpointFrequency
Average Interest Rates on Treasury Securities/v2/accounting/od/avg_interest_ratesMonthly
Treasury Reporting Rates of Exchange/v1/accounting/od/rates_of_exchangeQuarterly
Interest Expense on Public Debt/v2/accounting/od/interest_expenseMonthly

Securities & Auctions

DatasetEndpointFrequency
Treasury Securities Auctions Data/v1/accounting/od/auctions_queryAs Needed
Treasury Securities Upcoming Auctions/v1/accounting/od/upcoming_auctionsAs Needed
Treasury Securities Buybacks/v1/accounting/od/buybacks_operationsAs Needed

Savings Bonds

DatasetEndpointFrequency
I Bonds Interest Rates/v1/accounting/od/i_bonds_interest_ratesSemi-Annual
Savings Bonds Issues, Redemptions & Maturities/v1/accounting/od/savings_bonds_reportMonthly

Response Structure

{
  "data": [...],
  "meta": {
    "count": 100,
    "total-count": 3790,
    "total-pages": 38,
    "labels": {"field_name": "Human Readable Label"},
    "dataTypes": {"field_name": "STRING|NUMBER|DATE|CURRENCY"},
    "dataFormats": {"field_name": "String|10.2|YYYY-MM-DD"}
  },
  "links": {"self": "...", "first": "...", "prev": null, "next": "...", "last": "..."}
}

Note: All values are returned as strings. Convert as needed (e.g., float(), pd.to_datetime()). Null values appear as the string "null".

Common Patterns

Load all pages into a DataFrame

Use the bounded fetch_all() helper in parameters.md. For small result sets, a single request with page[size]=10000 may suffice when meta.total-pages is 1.

# Single-page fetch when total-pages == 1
params = {"sort": "-record_date", "page[size]": 10000}
resp = requests.get(f"{BASE_URL}/v2/accounting/od/debt_outstanding", params=params)
result = resp.json()
if result["meta"]["total-pages"] > 1:
    raise ValueError("Use fetch_all() from parameters.md for multi-page results")
df = pd.DataFrame(result["data"])

Aggregation (automatic sum)

Omitting grouping fields triggers automatic aggregation:

# Sum all deposits/withdrawals by record_date and transaction type
resp = requests.get(f"{BASE_URL}/v1/accounting/dts/deposits_withdrawals_operating_cash", params={
    "fields": "record_date,transaction_type,transaction_today_amt"
})

Reference Files

Repository
K-Dense-AI/scientific-agent-skills
Path

skills/usfiscaldata/SKILL.md

Commit

b2a92ba

Last updated
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