Eureka

curl "https://api.tcggraph.com/v1/cards/mtg_520db5fb-d96" \
  -H "Authorization: Bearer $TCGGRAPH_KEY"

# realised sales by day
curl "https://api.tcggraph.com/v1/prices/mtg_520db5fb-d96/sales?days=90" \
  -H "Authorization: Bearer $TCGGRAPH_KEY"

{
  card(id: "mtg_520db5fb-d96") {
    name
    prices { source finish currency low trend market }
    printings { key label kind imageFrom images { small } prices { source market trend } }
    languagePrices {
      language finish low lowNm offers truncatedAbove
      conditions { condition low offers }
    }
    gradedPrices { grader grade price }
  }
}