Fiscal Data at https://api.fiscaldata.treasury.gov/services/api/fiscal_service publishes US Treasury datasets: the national debt, interest rates, exchange rates, and more.
None — no key, no signup. Every example runs as-is.
Full reference: https://fiscaldata.treasury.gov/api-documentation/
Sort with a leading - for newest first.
curl "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/debt_to_penny?sort=-record_date&page%5Bsize%5D=1"{
"data": [
{
"record_date": "2026-09-22",
"debt_held_public_amt": "32375685818022.20",
"intragov_hold_amt": "7722148210419.87",
"tot_pub_debt_out_amt": "40097834028442.07",
"src_line_nbr": "1",
"record_fiscal_year": "2026",
"record_fiscal_quarter": "4",
"record_calendar_year": "2026",
"record_calendar_quarter": "3",
"record_calendar_month": "09",
"record_calendar_day": "22"
}
],
"meta": {
"count": 1,
"labels": {
"record_date": "Record Date",
"debt_held_public_amt": "Debt Held by the Public",
"intragov_hold_amt": "Intragovernmental Holdings",
"tot_pub_debt_out_amt": "Total Public Debt Outstanding",
"src_line_nbr": "Source Line Number",
"record_fiscal_year": "Fiscal Year",
"record_fiscal_quarter": "Fiscal Quarter Number",
"record_calendar_year": "Calendar Year",
"record_calendar_quarter": "Calendar Quarter Number",
"record_calendar_month": "Calendar Month Number",
"record_calendar_day": "Calendar Day Number"
},
"dataTypes": {
"record_date": "DATE",
"debt_held_public_amt": "CURRENCY",
"intragov_hold_amt": "CURRENCY",
"tot_pub_debt_out_amt": "CURRENCY",
"src_line_nbr": "INTEGER",
"record_fiscal_year": "YEAR",
"record_fiscal_quarter": "QUARTER",
"record_calendar_year": "YEAR",
"record_calendar_quarter": "QUARTER",
"record_calendar_month": "MONTH",
"record_calendar_day": "DAY"
},
"dataFormats": {
"record_date": "YYYY-MM-DD",
"debt_held_public_amt": "$10.20",
"intragov_hold_amt": "$10.20",
"tot_pub_debt_out_amt": "$10.20",
"src_line_nbr": "10",
"record_fiscal_year": "YYYY",
"record_fiscal_quarter": "Q",
"record_calendar_year": "YYYY",
"record_calendar_quarter": "Q",
"record_calendar_month": "MM",
"record_calendar_day": "DD"
},
"total-count": 8398,
"total-pages": 8398
},
"links": {
"self": "&page%5Bnumber%5D=1&page%5Bsize%5D=1",
"first": "&page%5Bnumber%5D=1&page%5Bsize%5D=1",
"prev": null,
"next": "&page%5Bnumber%5D=2&page%5Bsize%5D=1",
"last": "&page%5Bnumber%5D=8398&page%5Bsize%5D=1"
}
}curl "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/avg_interest_rates?sort=-record_date&page%5Bsize%5D=2"{
"data": [
{
"record_date": "2026-08-31",
"security_type_desc": "Marketable",
"security_desc": "Treasury Bills",
"avg_interest_rate_amt": "3.788",
"src_line_nbr": "1",
"record_fiscal_year": "2026",
"record_fiscal_quarter": "4",
"record_calendar_year": "2026",
"record_calendar_quarter": "3",
"record_calendar_month": "08",
"record_calendar_day": "31"
},
{
"record_date": "2026-08-31",
"security_type_desc": "Marketable",
"security_desc": "Treasury Notes",
"avg_interest_rate_amt": "3.345",
"src_line_nbr": "2",
"record_fiscal_year": "2026",
"record_fiscal_quarter": "4",
"record_calendar_year": "2026",
"record_calendar_quarter": "3",
"record_calendar_month": "08",
"record_calendar_day": "31"
}
],
"meta": {
"count": 2,
"labels": {
"record_date": "Record Date",
"security_type_desc": "Security Type Description",
"security_desc": "Security Description",
"avg_interest_rate_amt": "Average Interest Rate Amount",
"src_line_nbr": "Source Line Number",
"record_fiscal_year": "Fiscal Year",
"record_fiscal_quarter": "Fiscal Quarter Number",
"record_calendar_year": "Calendar Year",
"record_calendar_quarter": "Calendar Quarter Number",
"record_calendar_month": "Calendar Month Number",
"record_calendar_day": "Calendar Day Number"
},
"dataTypes": {
"record_date": "DATE",
"security_type_desc": "STRING",
"security_desc": "STRING",
"avg_interest_rate_amt": "PERCENTAGE",
"src_line_nbr": "INTEGER",
"record_fiscal_year": "YEAR",
"record_fiscal_quarter": "QUARTER",
"record_calendar_year": "YEAR",
"record_calendar_quarter": "QUARTER",
"record_calendar_month": "MONTH",
"record_calendar_day": "DAY"
},
"dataFormats": {
"record_date": "YYYY-MM-DD",
"security_type_desc": "String",
"security_desc": "String",
"avg_interest_rate_amt": "10.2%",
"src_line_nbr": "10",
"record_fiscal_year": "YYYY",
"record_fiscal_quarter": "Q",
"record_calendar_year": "YYYY",
"record_calendar_quarter": "Q",
"record_calendar_month": "MM",
"record_calendar_day": "DD"
},
"total-count": 5009,
"total-pages": 2505
},
"links": {
"self": "&page%5Bnumber%5D=1&page%5Bsize%5D=2",
"first": "&page%5Bnumber%5D=1&page%5Bsize%5D=2",
"prev": null,
"next": "&page%5Bnumber%5D=2&page%5Bsize%5D=2",
"last": "&page%5Bnumber%5D=2505&page%5Bsize%5D=2"
}
}