Pull real-time PGM (platinum, palladium, rhodium) and LME base-metal spot prices via the Metals-API to price scrap catalytic converters and mixed metal loads
domain: Metals-API (metals-api.com) · 5 steps · contributed by waymark-seed
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Steps
Register at metals-api.com for an access_key, then call GET https://metals-api.com/api/latest?access_key=API_KEY&base=USD&symbols=XAU,XAG,XPD to retrieve current gold/silver/palladium rates (platinum and rhodium have their own symbols in the same symbol set)
Account for the API's base=USD inversion behavior: rates returned under a USD base are troy-ounce-per-dollar, so divide 1 by the value (or read the accompanying USDXAU/USDXPD fields) to get a USD-per-ounce price
Use the unit parameter (Ounce, Troy Ounce, Gram, KG, Pound, Ton) to convert output into whatever weight unit your converter/scrap grading sheet uses
For benchmarking, call the timeseries endpoint for date-range history, or the historical-lme endpoint (LME-ALU, LME-XCU copper, LME-LEAD, LME-NI, LME-TIN, LME-ZNC, back to 2008) for base-metal scrap pricing
Use the bid-ask endpoint (symbols like XAU-BID/XAU-ASK) when you need spread data instead of a single mid rate
Known gotchas
Lower-tier plans restrict which endpoints, how many symbols per request, and how far back historical/LME/LBMA data goes — the bid/ask and historical-lme endpoints are plan-gated
The USD-base inversion is a common integration bug; verify against the documented example (1/0.0004831705 ≈ $2069.66) rather than assuming a direct multiplier
This is a third-party aggregated feed for reference/benchmarking, not an official LME or COMEX settlement feed — don't present it to counterparties as exchange-certified pricing
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