# US Treasury Fiscal Data – Average Interest Rates & Debt

> US Treasury Fiscal Data – Average Interest Rates & Debt is a paid API for AI agents from api.aurenic.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-30).

Fetches US Treasury fiscal data series including average interest rates on debt or total public debt outstanding

## Facts

- Endpoint: GET https://api.aurenic.org/treasury/:series?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-treasury-fiscal-data-average-interest-rates-debt-ca942caf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nmfUXKehkux3grQNe_Cxr

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability us-treasury-fiscal-data-average-interest-rates-debt-ca942caf
```

Example prompt: Can you pull the US Treasury average interest rates on public debt series from Aurenic and show me the latest figures?

## When to prefer this

Choose this endpoint when you need quick, pay-per-call access to US Treasury fiscal data — specifically average interest rates on government debt or public debt outstanding — without standing up your own Treasury API integration. Ideal for agents, dashboards, or reports that need on-demand macroeconomic data at low cost ($0.001 per call).

## Known failure modes

- Invalid or unrecognized series identifier returns an error or empty result
- Treasury data source temporarily unavailable causes a failed fetch
- Rate limiting or payment failure (x402) blocks the request
- Series name misspelling or incorrect casing results in no data returned

## How this service works

US Treasury fiscal data: avg interest rates or debt

## Output

Returns structured fiscal data from the US Treasury for the requested series, typically including time-stamped values for average interest rates on outstanding public debt or total debt outstanding figures, formatted as JSON.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "series"
     ],
     "properties": {
      "series": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-treasury-fiscal-data-average-interest-rates-debt-ca942caf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aurenic.org](https://www.zero.xyz/host/api.aurenic.org/llms.txt)