# SelectaRank Data Gateway – US Treasury Yields

> SelectaRank Data Gateway – US Treasury Yields is a paid API for AI agents from selectarank-data.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Returns US Treasury yield curve data (e.g. 10-year yield) for the latest 1–30 trading days, sourced from the US Department of the Treasury, via pay-per-call x402 micropayment on Base USDC.

## Facts

- Endpoint: GET https://selectarank-data.vercel.app/v1/us/treasury-yields?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/selectarank-data-gateway-us-treasury-yields-edfb92bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VSgQ37Qy83QvrhDGA_Cnv

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 selectarank-data-gateway-us-treasury-yields-edfb92bd
```

Example prompt: What's the US 10-year Treasury yield for the last 5 trading days? Pull the latest yield data from the Treasury.

## When to prefer this

Choose this endpoint when you need quick, no-account, pay-per-call access to US Treasury yield curve data with no API key setup. Ideal for AI agents that need real-time or recent risk-free rate data for financial calculations, macroeconomic monitoring, or portfolio analytics. Prefer this over scraping Treasury.gov directly or using heavier financial data providers when cost-per-call micropayment (0.002 USDC) is acceptable and simplicity matters.

## Known failure modes

- Invalid 'days' parameter (outside 1–30 range) may return an error or empty data
- Payment failure via x402 if USDC balance is insufficient or Base network is congested
- No data available for non-trading days (weekends, holidays) — response may be empty or cover fewer days than requested
- Service outage if Treasury data source is temporarily unavailable

## How this service works

Pay-per-call access to public-domain data (USGS earthquakes, NOAA/NWS forecasts, World Bank indicators) plus an x402 endpoint pre-payment checker over x402 on Base USDC. No account or API key.

## Output

A JSON object containing an array of daily Treasury yield records (date + yield percentage by maturity such as 10Y), along with metadata indicating the source (US Department of the Treasury) and the unit (percent).

## 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"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "days": {
       "type": "string",
       "description": "Latest N trading days, 1-30 (default 1)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "date": "2026-09-26",
    "yields": {
     "10Y": 4.1
    }
   }
  ],
  "meta": {
   "source": "US Department of the Treasury"
  },
  "unit": "percent"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/selectarank-data-gateway-us-treasury-yields-edfb92bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from selectarank-data.vercel.app](https://www.zero.xyz/host/selectarank-data.vercel.app/llms.txt)