Marketplace · API · x402

agent402.tools/api/treasury-yield-curve

Latest US Treasury daily constant-maturity yield curve in one object: recordDate plus mo1, mo3, mo6, yr1, yr2, yr3, yr5, yr7, yr10, yr20 and yr30, each a yield in percent. Source: FRED DGS* series (St. Louis Fed), public domain. No params - always returns the most recent published curve, which trails today by a business day or two; for a date range use treasury-yield-history. This product uses the FRED(R) API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.

Endpoint	`https://agent402.tools/api/treasury-yield-curve`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~162 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0
method	GET
last updated	2026-11-13T09:53:19.25Z

Use it

Call it (an x402 client pays automatically)

curl -i https://agent402.tools/api/treasury-yield-curve
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-dd9ba5e343ab2d50

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}