LastLook Data — current 30-year US Treasury yield (DGS30)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xB4848d1b4b7E31B75b9b30d717F89777dC65D68e",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
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  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xB4848d1b4b7E31B75b9b30d717F89777dC65D68e",
    "asset": "0x311935Cd80B76769bF2ecC9D8Ab7635b2139cf82",
    "amount": "100170",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "category": "finance",
      "description": "Financial market data for AI agents — Treasury yields, mortgage rates, FX rates, energy prices, and macro indicators. Pay per query via x402.",
      "input": {
        "method": "GET",
        "queryParams": {},
        "type": "http"
      },
      "logo_url": "https://api.lastlookdata.com/logo.png",
      "name": "LastLook Data",
      "output": {
        "example": {
          "date": "2026-05-09",
          "note": "Source: Federal Reserve Bank of St. Louis (FRED)",
          "series": "DGS30 - 30-Year Treasury Constant Maturity Rate",
          "service": "LastLook Data",
          "yield_percent": 4.97
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
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            "queryParams": {
              "properties": {},
              "type": "object"
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            "type": {
              "const": "http",
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          "required": [
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          "type": "object"
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        "output": {
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          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://api.lastlookdata.com/api/treasury/current"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://api.lastlookdata.com/api/treasury/current");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://api.lastlookdata.com/api/treasury/current")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header