Precious Metals Spot Prices

Real-time precious metals spot prices for AI agents via MCP. Gold, silver, platinum, palladium, and copper — live futures data with bullion value calculator.

Built by Mowell Labs.

What it does

This MCP server gives AI agents instant access to precious metals market data. No scraping, no API keys to manage — just call the tool and get structured JSON back.

• Live spot prices from Yahoo Finance futures (GC=F, SI=F, PL=F, PA=F, HG=F)
• Bullion value calculator — spot × weight × purity for any bar, round, or coin
• US silver coin melt values — pre-1965 dimes, quarters, half dollars, and dollars
• 60-second cache — fast responses without hammering the data source
• Validation — price range checks filter bad data from contract rollovers

Tools

get_spot_price

Get the current price per troy ounce for a single metal.

Input:

{"metal": "gold"}

Output:

{
  "metal": "gold",
  "symbol": "XAU",
  "price_per_troy_oz": 4788.60,
  "currency": "USD",
  "change": 44.60,
  "change_percent": 0.95,
  "source": "yahoo_finance",
  "timestamp": "2026-04-08T17:13:29Z"
}

get_all_spot_prices

Get all five metals in a single call.

Input: none required

Output:

{
  "prices": [
    {"metal": "gold", "price_per_troy_oz": 4788.60, "...": "..."},
    {"metal": "silver", "price_per_troy_oz": 75.58, "...": "..."},
    {"metal": "platinum", "price_per_troy_oz": 2065.60, "...": "..."},
    {"metal": "palladium", "price_per_troy_oz": 1599.50, "...": "..."},
    {"metal": "copper", "price_per_troy_oz": 0.40, "...": "..."}
  ],
  "currency": "USD",
  "supported_metals": ["gold", "silver", "platinum", "palladium", "copper"]
}

calculate_bullion_value

Calculate the melt value of a bullion piece.

Input:

{"metal": "gold", "weight_troy_oz": 1.0, "purity": 0.999}

Output:

{
  "metal": "gold",
  "weight_troy_oz": 1.0,
  "purity": 0.999,
  "spot_price_per_oz": 4788.60,
  "estimated_value": 4783.81,
  "currency": "USD",
  "note": "Melt/bullion value only. Retail premiums, numismatic value, and dealer spreads not included."
}

Common purity values: 0.999 (fine), 0.9167 (22k gold), 0.900 (90% silver coins), 0.9995 (platinum).

get_silver_melt_value

Calculate the silver melt value of pre-1965 US coins.

Input:

{"denomination": "quarter", "year": 1964}

Output:

{
  "denomination": "quarter",
  "year": 1964,
  "silver_content_troy_oz": 0.1808,
  "silver_spot_price": 75.58,
  "melt_value": 13.66,
  "note": "Based on 90% silver composition (pre-1965 US coins)."
}

Supported denominations: dime, quarter, half_dollar, dollar.

Supported metals

Metal	Ticker	Symbol	Example price
Gold	GC=F	XAU	$4,788/oz
Silver	SI=F	XAG	$75.58/oz
Platinum	PL=F	XPT	$2,065/oz
Palladium	PA=F	XPD	$1,599/oz
Copper	HG=F	HG	$0.40/oz

Pricing

Event	Price
Single metal spot price	$0.005
All metals batch lookup	$0.010
Bullion value calculation	$0.005
Silver melt value lookup	$0.005

Use with Claude Desktop

Add to your MCP client configuration:

{
  "mcpServers": {
    "spot-prices": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mowell-labs--spot-prices.apify.actor/mcp"]
    }
  }
}

Then ask your AI assistant:

• "What's the current gold price?"
• "How much is a 10 oz silver bar worth?"
• "What's the melt value of a 1964 quarter?"
• "Give me all precious metals prices."

Data source

Prices are sourced from Yahoo Finance futures contracts via the yfinance library. These are near-month futures prices that closely track spot during market hours.

• Cache TTL: 60 seconds
• Fallback prices returned (clearly marked) if live data is unavailable
• Price validation filters bad data from contract rollovers or API glitches

License

MIT — Mowell Labs