Tool detail

treasury-yields

Returns the daily US Treasury par yield curve (Constant Maturity Treasury rates, 1 month to 30 years) for the latest or a chosen historical day.

Categories: Market prices, Macro economics

Use when

get the current US Treasury yield curve
check historical Treasury yields for a specific year
get the risk-free rate across maturities for macro analysis

Not for

not a single maturity/ticker lookup - returns the full curve

Inputs

GET query params: limit (integer 1-250, default 1); year (integer 1990-2100, optional).

Admitted input schema

{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 250,
      "default": 1
    },
    "year": {
      "type": "integer",
      "minimum": 1990,
      "maximum": 2100
    }
  },
  "required": [
    "limit"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://x402stock.xyz/api/v1/treasury-yields

Payment

Protocol: x402
Listed price: 0.01 USDC per request on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://x402stock.xyz/api/v1/treasury-yields
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z