# Tanod utilpeek – US Treasury Par Yield Curve

> Tanod utilpeek – US Treasury Par Yield Curve is a paid API for AI agents from tanod.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-09).

Returns the US Treasury daily par yield curve rates (1 Mo to 30 Yr) for any trading date since January 1990.

## Facts

- Endpoint: POST https://tanod.dev/v1/finance/treasury/yields?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tanod-utilpeek-us-treasury-par-yield-curve-e4f28829
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NXug8piXThIijUjpezECj

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 tanod-utilpeek-us-treasury-par-yield-curve-e4f28829 -d '<json body>'
```

Example prompt: What were the US Treasury par yield curve rates on March 15, 2022 — I need all maturities from 1 month to 30 years?

## When to prefer this

Choose this endpoint when you need official US Treasury par yield curve rates (CMT rates) for any specific historical date back to 1990 or the latest published curve, especially when you need the full maturity spectrum from 1 month to 30 years in a single call. Prefer it over scraping the Treasury website directly, or over financial data APIs that charge more or don't expose historical granularity by date. Ideal for financial modeling, risk-free rate lookups, yield curve analysis, and fixed income research.

## Known failure modes

- Date before 1990-01-02 returns an error (out of range)
- Date in the future beyond published data returns the latest available curve with adjusted:true
- Weekend or US federal holiday dates return the nearest earlier published curve with adjusted:true
- Malformed date string (not YYYY-MM-DD) returns a validation error
- Network or upstream Treasury data unavailability may cause transient failures

## How this service works

One MCP server and HTTP API with 193 pay-per-call tools for AI agents (security checks, chain data, finance, aviation, documents), plus free uptime and MikroTik monitoring and 130+ free browser tools. No signup; free daily tier. Operated by an AI.

## Output

A JSON object containing the curve date, all maturity yields in percent per year (bond-equivalent par yields), an adjusted flag indicating if the nearest earlier curve was returned instead of the requested date, stale and cached flags, the cache duration, source attribution from the US Treasury, and an informational disclaimer.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "anyOf": [
    {
     "type": "string",
     "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
    },
    {
     "type": "null"
    }
   ],
   "default": null,
   "description": "Curve date YYYY-MM-DD (1990-01-02 to today). Default: the latest published curve. A date with no curve (weekend, holiday, not yet published) returns the nearest earlier one, with adjusted: true."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-10-02",
  "note": "No curve was published for 2026-10-04 (weekend, US federal holiday, market closure or not yet published); this is the nearest earlier date with a published curve.",
  "unit": "percent per year (bond-equivalent par yields, Treasury CMT curve)",
  "stale": false,
  "cached": false,
  "source": {
   "url": "https://home.treasury.gov/resource-center/data-chart-center/interest-rates/TextView?type=daily_treasury_yield_curve",
   "name": "U.S. Department of the Treasury, Daily Treasury Par Yield Curve Rates",
   "terms": "https://home.treasury.gov/subfooter/site-policies-and-notices",
   "notice": "Data: U.S. Department of the Treasury. No endorsement by the Treasury is implied.",
   "license": "US Government work, public domain"
  },
  "adjusted": true,
  "disclaimer": "Informational only. Not investment advice.",
  "yields_pct": {
   "1 Mo": 4.04,
   "1 Yr": 4.46,
   "2 Mo": 4.11,
   "2 Yr": 4.83,
   "3 Mo": 4.19,
   "3 Yr": 4.96,
   "4 Mo": 4.26,
   "5 Yr": 5.06,
   "6 Mo": 4.27,
   "7 Yr": 5.17,
   "10 Yr": 5.28,
   "20 Yr": 5.67,
   "30 Yr": 5.63,
   "1.5 Mo": 4.09
  },
  "cache_seconds": 21600,
  "requested_date": "2026-10-04"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tanod-utilpeek-us-treasury-par-yield-curve-e4f28829/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tanod.dev](https://www.zero.xyz/host/tanod.dev/llms.txt)