Marketplace · API · x402

opendata402.com/v1/treasury/yields

Daily US Treasury par yield curve rates from the US Department of the Treasury: 1-month to 30-year yields for the latest business days of the current month. Use it for interest rate context, discounting, bond and macro analysis. US public domain.

Endpoint	`https://opendata402.com/v1/treasury/yields`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~314 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	0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1
method	GET
last updated	2026-10-14T22:34:28.947Z

Use it

Call it (an x402 client pays automatically)

curl -i https://opendata402.com/v1/treasury/yields
# 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/x402-004af53c37034989

Search the whole marketplace from your agent (MCP)

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