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U.S. Treasury Fiscal Data API Skill

Lets Claude query the key-free U.S. Treasury Fiscal Data REST API for national debt, auctions, exchange rates, and federal revenue/spending.

Data & AnalyticsIntermediate★ 33,030⑂ 3,248AI score 9/10Last updated: Aug 9, 2026

What it does

  • Points Claude at the free, open Treasury Fiscal Data API (api.fiscaldata.treasury.gov) — no key or registration needed.
  • Provides an endpoint cheatsheet for the most-used datasets: Debt to the Penny, Historical Debt Outstanding, Daily/Monthly Treasury Statements, average interest rates on Treasury securities, quarterly rates of exchange, auctions, buybacks, and savings bond rates.
  • Documents query parameters (fields, filter, sort, format, page[size], page[number]), filter operators, response envelope (data/meta/links), and pagination patterns.
  • Warns about real gotchas: all values come back as strings, nulls appear as "null", and endpoint paths change over time so you should verify with each dataset's API Quick Guide.

Who it's for

  • Macro analysts, fixed-income researchers, and quants tracking U.S. federal finances.
  • Data engineers building dashboards or ETL jobs on public fiscal data.
  • Journalists and writers who need sourced U.S. debt or spending figures.

Example uses

  1. "What is the current total U.S. public debt?" → single debt_to_penny call sorted by -record_date.
  2. "Build a table of Treasury CAD and MXN exchange rates since 2024" → rates_of_exchange with an in filter loaded into pandas.
  3. "Chart average interest rates on Treasury securities over the last decade" → paginate avg_interest_rates and plot the time series.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/K-Dense-AI/scientific-agent-skills/HEAD/skills/usfiscaldata/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/usfiscaldata folder from the GitHub repo K-Dense-AI/scientific-agent-skills into my ~/.claude/skills/usfiscaldata/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/K-Dense-AI/scientific-agent-skills.git /tmp/sas && mkdir -p ~/.claude/skills && cp -r /tmp/sas/skills/usfiscaldata ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and clone the repo: git clone https://github.com/K-Dense-AI/scientific-agent-skills.git
  2. Create the skills folder if needed: mkdir -p ~/.claude/skills
  3. Copy just this skill: cp -r scientific-agent-skills/skills/usfiscaldata ~/.claude/skills/
  4. Install the Python dependencies: uv pip install requests pandas (or pip install requests pandas).
  5. Restart Claude Code and try a prompt like "Get the latest U.S. national debt figure" to trigger the skill.
View source on GitHub ↗License: MIT