US Treasury Fiscal Data
U.S. Department of the Treasury Fiscal Data API. Public domain.
- cost
- Free every endpoint, within the daily allowance
- after that
- from $0.001 / call · card or USDC
- endpoints
- 5
No signup needed over MCP: 50 free calls a day, or 500 with a free key.
National debt to the penny Free
Total public debt outstanding, latest days.
- cost
- Free then $0.001 / call
- MCP tool
- us-treasury__debt-to-penny
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/us-treasury/debt-to-penny
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/us-treasury/debt-to-penny" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/us-treasury/debt-to-penny"
by fourzerotwo
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Average interest rates Free
Average interest rates on marketable and non-marketable Treasury securities.
- cost
- Free then $0.001 / call
- MCP tool
- us-treasury__avg-interest-rates
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/us-treasury/avg-interest-rates
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/us-treasury/avg-interest-rates" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/us-treasury/avg-interest-rates"
by fourzerotwo
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Daily cash balance Free
Treasury General Account operating cash balance, latest days.
- cost
- Free then $0.001 / call
- MCP tool
- us-treasury__operating-cash
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/us-treasury/operating-cash
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/us-treasury/operating-cash" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/us-treasury/operating-cash"
by fourzerotwo
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Gold reserve Free
US Treasury-owned gold by location, latest.
- cost
- Free then $0.001 / call
- MCP tool
- us-treasury__gold-reserve
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/us-treasury/gold-reserve
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/us-treasury/gold-reserve" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/us-treasury/gold-reserve"
by fourzerotwo
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Treasury exchange rates Free
Quarterly Treasury reporting rates of exchange for a country's currency.
- cost
- Free then $0.001 / call
- MCP tool
- us-treasury__exchange-rates
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/us-treasury/exchange-rates
| Param | Type | Description |
|---|---|---|
| currency | string | Filter, e.g. country_currency_desc:eq:United Kingdom-Pound |
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/us-treasury/exchange-rates?currency=country_currency_desc%3Aeq%3AUnited%20Kingdom-Pound" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/us-treasury/exchange-rates?currency=country_currency_desc%3Aeq%3AUnited%20Kingdom-Pound"
by fourzerotwo
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Source: U.S. Department of the Treasury, Fiscal Data. Public domain.