Which endpoint do I need?
Pick the endpoint by the question you're answering. Every price field is integer USD cents.
You wantEndpoint
Best bid/ask and spread for one itemGET /v1/nbbo
Full cross-market snapshot (per-market quotes + aggregate)GET /v1/pricing/:marketHashName
Order-book depth around the NBBOGET /v1/nbbo/depth
Time-bucketed price historyGET /v1/pricing/:marketHashName/history
Price history split per marketGET /v1/pricing/:marketHashName/history/markets
Individual live listings (float, paint seed, stickers)GET /v1/pricing/:marketHashName/listings
A suggested list or sell priceGET /v1/recommendations/:marketHashName
Ranked cross-market arbitrage opportunitiesGET /v1/arbitrage/opportunities
Per-float and attribute bucket pricesGET /v1/attribute-prices/latest
Per-attribute price history over timeGET /v1/attribute-prices/history
Attribute buckets from buff163 onlyGET /v1/markets/buff163/latest
Buff163 attribute history over timeGET /v1/markets/buff163/history
Search or list the catalog with pricingGET /v1/items
Lowest ask / highest bid for many items at onceGET /v1/aggregations/min-prices
How liquid an item is and time-to-sellGET /v1/liquidity/:marketHashName
Per-market current + windowed analyticsGET /v1/market-analytics/:marketHashName
Per-market ingest freshnessGET /v1/status/freshness
Which markets are integrated, plus their health (no key)GET /v1/markets/health