Live Chainlink oracle spot price for a pair (latestRoundData, on-chain)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "category": "market-data",
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "chain": "Feed chain override: eth(ereum) | base. Defaults to the pair's primary chain."
        },
        "type": "http"
      },
      "output": {
        "properties": {
          "chain": {
            "enum": [
              "ethereum",
              "base"
            ],
            "type": "string"
          },
          "decimals": {
            "type": "integer"
          },
          "feed_address": {
            "type": "string"
          },
          "pair": {
            "type": "string"
          },
          "price": {
            "description": "Decimal USD price (answer / 10^decimals) as a string.",
            "type": "string"
          },
          "round_id": {
            "description": "Chainlink roundId (phase-packed uint80) as a string.",
            "type": "string"
          },
          "source": {
            "enum": [
              "chainlink"
            ],
            "type": "string"
          },
          "stale": {
            "description": "True if older than the feed's ~heartbeat guess.",
            "type": "boolean"
          },
          "staleness_seconds": {
            "description": "now - updatedAt.",
            "type": "integer"
          },
          "updated_at": {
            "description": "ISO time of the on-chain round's updatedAt.",
            "type": "string"
          }
        },
        "required": [
          "pair",
          "chain",
          "price",
          "decimals",
          "updated_at",
          "round_id",
          "feed_address",
          "staleness_seconds",
          "stale",
          "source"
        ],
        "type": "object"
      }
    },
    "routeTemplate": "https://x402.professorsausages.com/prices/spot/:pair",
    "schema": {
      "properties": {
        "input": {
          "type": "object"
        },
        "output": {
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "catalog": {
    "catalogUrl": "https://x402.professorsausages.com/?ref=402&v=menu&from=prices",
    "message": "28 more agent-ready APIs you can call the same way (x402 pay-per-call). Full free catalog at the catalog URL; each serves a FREE real sample record (freeSample link) — taste before you pay. A few you might want:",
    "services": [
      {
        "call": "/token-safety?ref=xsell&v=menu&from=prices",
        "freeSample": "/token-safety/sample?ref=xsell&v=menu&from=prices",
        "name": "Token Safety Check",
        "summary": "On-chain token risk screening for agents"
      },
      {
        "call": "/address-screen?ref=xsell&v=menu&from=prices",
        "freeSample": "/address-screen/sample?ref=xsell&v=menu&from=prices",
        "name": "Address Risk Screen",
        "summary": "Crypto address risk screening for agents"
      },
      {
        "call": "/sanctions-screen?ref=xsell&v=menu&from=prices",
        "freeSample": "/sanctions-screen/sample?ref=xsell&v=menu&from=prices",
        "name": "OFAC Sanctions Name Screen",
        "summary": "Fuzzy OFAC name screening for agents with compliance duties"
      },
      {
        "call": "/email-check?ref=xsell&v=menu&from=prices",
        "freeSample": "/email-check/sample?ref=xsell&v=menu&from=prices",
        "name": "Email Deliverability Check",
        "summary": "Part of the Trust & Verification suite — verify anything, pay-per-check"
      },
      {
        "call": "/domain-intel?ref=xsell&v=menu&from=prices",
        "freeSample": "/domain-intel/sample?ref=xsell&v=menu&from=prices",
        "name": "Domain Intel (RDAP + DNS)",
        "summary": "Domain registration truth + DNS posture for agents, pay-per-check — part of the Trust & Verification suite…"
      },
      {
        "call": "/url-screen?ref=xsell&v=menu&from=prices",
        "freeSample": "/url-screen/sample?ref=xsell&v=menu&from=prices",
        "name": "Malicious URL Screen",
        "summary": "Phishing & malicious-URL screening for agents — hand over any http(s) URL and get a structured risk verdict…"
      },
      {
        "call": "/phone-check?ref=xsell&v=menu&from=prices",
        "freeSample": "/phone-check/sample?ref=xsell&v=menu&from=prices",
        "name": "Phone Number Validation",
        "summary": "Phone-number validation for agents — is this number real, what region and line type, and its canonical E.16…"
      },
      {
        "call": "/swap-quote?ref=xsell&v=menu&from=prices",
        "freeSample": "/swap-quote/sample?ref=xsell&v=menu&from=prices",
        "name": "DEX Swap Quote",
        "summary": "Read-only on-chain swap pricing for agents"
      },
      {
        "call": "/gas-oracle?ref=xsell&v=menu&from=prices",
        "freeSample": "/gas-oracle/sample?ref=xsell&v=menu&from=prices",
        "name": "Multichain Gas Oracle",
        "summary": "Live multi-chain gas oracle for on-chain agents"
      },
      {
        "call": "/ens-resolve?ref=xsell&v=menu&from=prices",
        "freeSample": "/ens-resolve/sample?ref=xsell&v=menu&from=prices",
        "name": "ENS Resolver",
        "summary": "Spoof-safe ENS resolution for on-chain agents"
      },
      {
        "call": "/company?ref=xsell&v=menu&from=prices",
        "freeSample": "/company/sample?ref=xsell&v=menu&from=prices",
        "name": "Company Enrichment (SEC EDGAR)",
        "summary": "Company enrichment for agents — hand over a ticker, CIK, or name and get ground-truth SEC identity plus fin…"
      },
      {
        "call": "/sec-10k?ref=xsell&v=menu&from=prices",
        "freeSample": "/sec-10k/sample?ref=xsell&v=menu&from=prices",
        "name": "SEC Annual Report (10-K)",
        "summary": "U.S"
      },
      {
        "call": "/sec-10q?ref=xsell&v=menu&from=prices",
        "freeSample": "/sec-10q/sample?ref=xsell&v=menu&from=prices",
        "name": "SEC Quarterly Report (10-Q)",
        "summary": "U.S"
      },
      {
        "call": "/sec-8k?ref=xsell&v=menu&from=prices",
        "freeSample": "/sec-8k/sample?ref=xsell&v=menu&from=prices",
        "name": "SEC Current Report (8-K)",
        "summary": "U.S"
      },
      {
        "call": "/insider-trades?ref=xsell&v=menu&from=prices",
        "freeSample": "/insider-trades/sample?ref=xsell&v=menu&from=prices",
        "name": "Insider Trades",
        "summary": "SEC Form 4 insider transactions made agent-ready — who's buying and selling their own company's stock, norm…"
      },
      {
        "call": "/13f-holdings?ref=xsell&v=menu&from=prices",
        "freeSample": "/13f-holdings/sample?ref=xsell&v=menu&from=prices",
        "name": "13F Institutional Holdings",
        "summary": "What every institutional manager actually holds, made agent-ready — normalized SEC 13F-HR portfolios for ~8…"
      },
      {
        "call": "/macro?ref=xsell&v=menu&from=prices",
        "freeSample": "/macro/sample?ref=xsell&v=menu&from=prices",
        "name": "US Macro Indicators",
        "summary": "WIP / FREE (BETA) — currently free while data coverage and freshness are expanded; pricing returns once pro…"
      },
      {
        "call": "/patent?ref=xsell&v=menu&from=prices",
        "freeSample": "/patent/sample?ref=xsell&v=menu&from=prices",
        "name": "US Patent Search",
        "summary": "WIP / FREE (BETA) — currently free; the corpus is a small curated slice of landmark patents while the full…"
      },
      {
        "call": "/ipo-calendar?ref=xsell&v=menu&from=prices",
        "freeSample": "/ipo-calendar/sample?ref=xsell&v=menu&from=prices",
        "name": "IPO Calendar",
        "summary": "The US IPO pipeline straight from SEC EDGAR — public domain, no paid feed"
      },
      {
        "call": "/fx-rates?ref=xsell&v=menu&from=prices",
        "freeSample": "/fx-rates/sample?ref=xsell&v=menu&from=prices",
        "name": "FX Reference Rates",
        "summary": "Daily reference FX rates for commerce and accounting agents"
      },
      {
        "call": "/weather?ref=xsell&v=menu&from=prices",
        "freeSample": "/weather/sample?ref=xsell&v=menu&from=prices",
        "name": "Weather & Forecast",
        "summary": "Weather for agents — the canonical tool call, pay-per-use"
      },
      {
        "call": "/reader?ref=xsell&v=menu&from=prices",
        "freeSample": "/reader/sample?ref=xsell&v=menu&from=prices",
        "name": "Web Reader & Screenshot",
        "summary": "Give your agent a real browser"
      },
      {
        "call": "/convert?ref=xsell&v=menu&from=prices",
        "freeSample": "/convert/sample?ref=xsell&v=menu&from=prices",
        "name": "Document Convert (PDF/Image → Text)",
        "summary": "Document conversion tools for agents — hand over any PDF or image (public URL, base64, or raw POSTed bytes,…"
      },
      {
        "call": "/nft?ref=xsell&v=menu&from=prices",
        "freeSample": "/nft/sample?ref=xsell&v=menu&from=prices",
        "name": "NFT Insight (Scam Check, Owners)",
        "summary": "NFT collection intelligence for agents — Ethereum now, Base next"
      },
      {
        "call": "/sfx?ref=xsell&v=menu&from=prices",
        "freeSample": "/sfx/sample?ref=xsell&v=menu&from=prices",
        "name": "8-bit SFX Generator",
        "summary": "Deterministic 8-bit sound-effect synthesis for agents — game-ready WAVs from a seed or preset in one paid c…"
      },
      {
        "call": "/icons?ref=xsell&v=menu&from=prices",
        "freeSample": "/icons/sample?ref=xsell&v=menu&from=prices",
        "name": "Icon Search",
        "summary": "Inline SVG icons for agents building UIs without CDN access — CSP blocks icon CDNs and hand-drawn path data…"
      },
      {
        "call": "/pokemon?ref=xsell&v=menu&from=prices",
        "freeSample": "/pokemon/sample?ref=xsell&v=menu&from=prices",
        "name": "Pokemon API",
        "summary": "Pokemon knowledge base for agents"
      },
      {
        "call": "/minecraft?ref=xsell&v=menu&from=prices",
        "freeSample": "/minecraft/sample?ref=xsell&v=menu&from=prices",
        "name": "Minecraft Data",
        "summary": "Minecraft game data for agents — look up any block or item by name with properties, ids and metadata, list…"
      }
    ],
    "strategy": "menu"
  },
  "discount": {
    "header": "X-Intent",
    "hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
    "off": "50%"
  },
  "sample": {
    "hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying.",
    "url": "https://x402.professorsausages.com/prices/sample"
  },
  "suggest": {
    "hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first.",
    "url": "https://x402.professorsausages.com/suggest"
  }
}

curl "https://x402.professorsausages.com/prices/spot/:pair"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402.professorsausages.com/prices/spot/:pair");
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://x402.professorsausages.com/prices/spot/:pair")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header