US federal debt, Treasury auction results, average interest rates, daily cash balance and the par yield curve from official Treasury data.
About the US Treasury API
US Treasury API on Apizie: 5 endpoints (Yield Curve, Auctions, Average Interest Rates, Daily Treasury Statement, …) returned as clean JSON through one API key. 5 endpoints are live now. Call it over REST at https://zieapi.vercel.app/v1/finance:us-treasury/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.
| Project key | finance:us-treasury |
|---|---|
| Status | Live |
| Endpoints | 5 |
| Category | Finance |
| Source | treasury.gov |
| Base URL | https://zieapi.vercel.app/v1/finance:us-treasury/{endpoint} |
| For AI tools | OpenAPI spec · Markdown (what is this?) |
US Treasury API FAQ
How do I call the US Treasury API?
Create a free Apizie key, then send GET https://zieapi.vercel.app/v1/finance:us-treasury/yield-curve with the header x-api-key. Every endpoint returns { project, data, timestamp }.
Is the US Treasury API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card.
Can AI agents use the US Treasury API?
Yes. Add the Apizie MCP server (https://zieapi.vercel.app/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key finance:us-treasury.
What is the status of the US Treasury API?
Live: works with just an Apizie key