Card price API for collection and portfolio apps

const API = "https://api.tickermint.cards";

// The "add a card" search box: name plus collector number works best. No key.
const q = encodeURIComponent("luffy op05-119");
const hits = await fetch(`${API}/products/search?q=${q}&game=one-piece`).then((r) => r.json());
for (const c of hits.slice(0, 5)) console.log(c.product_id, c.name, c.set_name, c.card_number, c.image_url);

const API = "https://api.tickermint.cards";

// One user's collection: product_id -> printing and copies
const collection = {
  517045: { printing: "Holofoil", copies: 1 },
  632504: { printing: "Foil", copies: 2 },
};

// Daily history for up to 50 products per call (bulk endpoints: any paid key)
const ids = Object.keys(collection).join(",");
const res = await fetch(`${API}/v1/bulk/history?ids=${ids}&since=2026-07-01`, {
  headers: { "X-API-Key": process.env.TICKERMINT_KEY }, // keep the key on your server
});
if (!res.ok) throw new Error(`TickerMint ${res.status}`);
const { products } = await res.json(); // each day is [day, market, low]

// collection value per day: copies x market, for the chart on the user's portfolio screen
const byDay = {};
for (const [pid, { printing, copies }] of Object.entries(collection)) {
  for (const [day, market] of products[pid]?.[printing] ?? []) {
    if (market != null) byDay[day] = (byDay[day] ?? 0) + copies * Number(market);
  }
}
const days = Object.keys(byDay).sort();
console.log("value on", days.at(-1), byDay[days.at(-1)].toFixed(2));