US national debt to the penny
API · /treasury-api
US Treasury API
healthy
4,151 Subscribers
US Treasury fiscal data as an API, live from the official api.fiscaldata.treasury.gov. Track the US national debt to the penny (total public debt outstanding, debt held by the public and intragovernmental holdings) for the latest day or any date range; get the average interest rates the US government pays on its securities (Treasury Bills, Notes, Bonds, TIPS and more); and look up the official US Treasury reporting exchange rates for ~170 world currencies, used to convert foreign currency to USD for government reporting. Ideal for debt clocks, macro-economic dashboards, fintech, research and data journalism. Public-domain US Treasury data.
api.oanor.com/treasury-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 394 ms
- Server probes · 24h
- Subscribers
- 4,151
- active
- Total calls
- 80
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 3,700 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 3,700 calls/month
- 2 req/sec
- Debt + rates + exchange rates
- No credit card
Starter
€6.20 /month
- 51,000 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 51k calls/month
- 8 req/sec
- Date-range history + filters
- Email support
Pro
€16.20 /month
- 260,000 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 260k calls/month
- 20 req/sec
- Dashboards / fintech / research
- Priority support
Mega
€41.00 /month
- 1,290,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 1.29M calls/month
- 50 req/sec
- Macro-data platform
- Dedicated SLA
Built by
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api.oanor.com/daotreasury-api
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What the US national debt is actually made of, served from the Treasury's Monthly Statement of the Public Debt. The headline debt-to-the-penny figure is one number; this is the breakdown — how the roughly $39 trillion splits across Treasury Bills, Notes, Bonds, TIPS and Floating-Rate Notes (the marketable, tradable debt) versus the non-marketable debt (the Government Account Series held by federal trust funds, Savings Bonds, and State and Local Government Series). The composition endpoint returns the latest full breakdown by security class, each with its share of the total and its split between debt held by the public and intragovernmental holdings. The marketable endpoint isolates the tradable securities (Bills/Notes/Bonds/TIPS/FRN) with each one's share of marketable debt — the issuance mix that rates traders and the Treasury's quarterly refunding watch. The history endpoint returns one security class's outstanding amount month by month. This is the debt-structure data-cut, distinct from the debt-to-the-penny total, the fiscal-deficit and the yield-curve APIs in the catalogue. Live, updated monthly, no key on the upstream, nothing stored.
api.oanor.com/debtcomposition-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for US Treasury API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call US Treasury API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for US Treasury API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does US Treasury API cost?
US Treasury API has a free tier with 100 calls / month. Paid plans start at €6.20 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is US Treasury API GDPR-compliant?
All requests to US Treasury API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/treasury-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/treasury-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/treasury-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/treasury-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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