# DDG Treasury Yield Curve Rates

> DDG Treasury Yield Curve Rates is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Returns U.S. Treasury daily par yield curve rates for maturities from 1-month to 30-year, for a specific date, month, or the latest business day.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/treasury-yield-curve?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-treasury-yield-curve-rates-df708e07
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4dbmOuMZ8ZmjpBs2q-QJ-

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 ddg-treasury-yield-curve-rates-df708e07 -d '<json body>'
```

Example prompt: What are today's U.S. Treasury par yield curve rates across all maturities, from 1-month out to 30-year?

## When to prefer this

Choose this endpoint when you need official U.S. Treasury par yield curve rates as published by treasury.gov, especially for specific historical dates or months. Prefer it over scraped or third-party rate sources when data provenance and public-domain accuracy matter, or when you need the full maturity spectrum from 1-month to 30-year in a single call via a machine-payable x402 API.

## Known failure modes

- Requested date falls on a weekend or holiday with no yield curve data published
- Date is out of range or in the future
- Malformed date input returns a validation error
- Treasury.gov upstream unavailability may cause stale or missing data
- Unsupported maturity requested

## How this service works

U.S. Treasury daily par yield curve rates: 1M-30Y maturities for the latest business day, a chosen date, or a whole month, plus recent history. Upstream: treasury.gov daily treasury par yield curve (public domain).

## Output

Returns U.S. Treasury daily par yield curve rates for all standard maturities (1M, 2M, 3M, 6M, 1Y, 2Y, 3Y, 5Y, 7Y, 10Y, 20Y, 30Y) for the requested date, month, or latest available business day, sourced from treasury.gov public domain data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "ok": true
    }
   },
   "additionalProperties": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-treasury-yield-curve-rates-df708e07/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.daedalusdevelopmentgroup.com](https://www.zero.xyz/host/agents.daedalusdevelopmentgroup.com/llms.txt)