{
  "version": "2",
  "name": "AssayChain Mineral Intelligence API",
  "description": "USGS critical-mineral benchmarks (copper, gold, silver, lithium, cobalt, nickel, manganese, graphite) and empirical ultrasound gravity-separation run data, with on-chain EAS attestations on Base and IPFS provenance. Core benchmark endpoints are free (rate-limited); advanced endpoints are x402-gated from $0.10 USDC per call. No API keys.",
  "website": "https://assaychain.com",
  "docs": "https://assaychain.com/api.html",
  "mcp_url": "https://assaychain.com/api/mcp",
  "base_url": "https://assaychain.com/api",
  "payTo": "0x750977976Ab85A4Ce5AAbb2e1a9fc80a633f2769",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "endpoints": [
    {
      "method": "GET",
      "path": "/benchmark/gold",
      "url": "https://assaychain.com/api/benchmark/gold",
      "name": "Gold Commodity Benchmark",
      "description": "USGS gold benchmark: mine production by country, reserves, pricing history, CO2e per tonne, EAS attestation UID on Base.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/silver",
      "url": "https://assaychain.com/api/benchmark/silver",
      "name": "Silver Commodity Benchmark",
      "description": "USGS silver benchmark: industrial demand breakdown, mine output by country, reserves, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/copper",
      "url": "https://assaychain.com/api/benchmark/copper",
      "name": "Copper Commodity Benchmark",
      "description": "USGS copper benchmark: energy-transition demand projections, mine production by country, reserves, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/lithium",
      "url": "https://assaychain.com/api/benchmark/lithium",
      "name": "Lithium Commodity Benchmark",
      "description": "USGS lithium benchmark: EV battery demand, hard-rock vs brine supply breakdown, reserves by country, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/cobalt",
      "url": "https://assaychain.com/api/benchmark/cobalt",
      "name": "Cobalt Commodity Benchmark",
      "description": "USGS cobalt benchmark: DRC supply share, battery vs superalloy demand split, reserves by country, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/nickel",
      "url": "https://assaychain.com/api/benchmark/nickel",
      "name": "Nickel Commodity Benchmark",
      "description": "USGS nickel benchmark: Indonesian supply dominance, sulfide vs laterite ore split, reserves by country, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/manganese",
      "url": "https://assaychain.com/api/benchmark/manganese",
      "name": "Manganese Commodity Benchmark",
      "description": "USGS manganese benchmark: steelmaking vs LMFP battery demand split, reserves by country, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/graphite",
      "url": "https://assaychain.com/api/benchmark/graphite",
      "name": "Graphite Commodity Benchmark",
      "description": "USGS graphite benchmark: natural vs synthetic anode share, China supply concentration, reserves by country, EAS attestation UID.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/price-snapshot/copper",
      "url": "https://assaychain.com/api/price-snapshot/copper",
      "name": "Daily Price Snapshot (20 critical minerals)",
      "description": "Daily market context bundle for any of the 20 critical minerals: spot price, Baltic Dry Index, WTI, EUR/USD FX rate, LME stock. Free (rate-limited); attested in weekly batches.",
      "amount": "0",
      "price_usd": "0.00"
    },
    {
      "method": "GET",
      "path": "/benchmark/research/mineral-processing/thixotropic-elutriation-v1",
      "url": "https://assaychain.com/api/benchmark/research/mineral-processing/thixotropic-elutriation-v1",
      "name": "Mineral Processing Study: Thixotropic Elutriation V1",
      "description": "First-party empirical run logs from active field season: tray geometry, feed weight, yield, concentrate grade, ultrasound settings, phase. IPFS-pinned, EAS-attested on Base.",
      "amount": "100000",
      "price_usd": "0.10"
    },
    {
      "method": "POST",
      "path": "/extract/run",
      "url": "https://assaychain.com/api/extract/run",
      "name": "Assay Document Extraction",
      "description": "Structured mineral assay extraction from PDF, image, or CSV. AI-powered extraction. Dynamic pricing based on page count.",
      "amount": "variable",
      "price_usd": "0.10-5.00"
    },
    {
      "method": "GET",
      "path": "/health",
      "url": "https://assaychain.com/api/health",
      "name": "Health Check",
      "description": "API status, version, uptime. Free.",
      "amount": "0",
      "price_usd": "0.00"
    }
  ]
}