# treasuryfiscal.debt.expense

Get the monthly and fiscal-year-to-date interest expense on US federal debt, broken down by security type (Treasury Notes, Bonds, TIPS, Inflation Compensation on TIPS, FRN, Bills, Savings Bonds, etc.). Shows how much the US government pays each month to service its debt. Includes both accrued interest on public issues and intragovernmental holdings. Source: US Treasury Fiscal Data — interest_expense, no auth, commercial use permitted.

Agent View of the PolicyLayer registry record for `treasuryfiscal.debt.expense`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/treasuryfiscal.debt.expense

## Facts

- Tool: `treasuryfiscal.debt.expense`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | integer | no | Maximum number of records to return (1–200). Default 20. Each monthly report contains multiple rows — one per security type (T-Notes, T-Bonds, TIPS, FRN, Bills, |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "treasuryfiscal.debt.expense",
    "arguments": {}
  }
}
```

## Why treasuryfiscal.debt.expense is rated Low

Retrieves historical US federal debt service data with no side effects or modifications.

From the tool's own definition: "Get monthly and fiscal-year-to-date interest expense, broken down by security type."

## Use case

AI agents call treasuryfiscal.debt.expense to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "treasuryfiscal.debt.expense": {}
  }
}
```

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## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase