Feed API: Real-Time Price and Bid Changes

curl -N -sS \
  -H "Authorization: Bearer $CS2C_API_KEY" \
  "https://api.cs2c.app/v1/feed/prices?providers=steam&providers=csfloat&item_ids=17464"

// EventSource can't send an Authorization header directly. Proxy the request
// through your own backend, or pass a scoped token as a query param if your
// deployment supports it — do not embed a raw API key in client-side code.
const source = new EventSource(
  "https://api.cs2c.app/v1/feed/prices?providers=steam&providers=csfloat&item_ids=17464",
);

source.addEventListener("ready", (event) => {
  const { providers, item_ids_filter_count } = JSON.parse(event.data);
  console.log("subscribed", providers, "filtered items:", item_ids_filter_count);
});

source.addEventListener("prices.changed", (event) => {
  const { provider, seen_at, items } = JSON.parse(event.data);
  for (const item of items) {
    console.log(provider, seen_at, item.item_id, item.change, item.price);
  }
});

source.onerror = () => {
  // Fetch current state from GET /prices, then let EventSource auto-reconnect
  // (or close and open a new one) once you've resynced.
};

import os

import cs2cap

configuration = cs2cap.Configuration(access_token=os.environ["CS2C_API_KEY"])

with cs2cap.ApiClient(configuration) as client:
    feed = cs2cap.FeedStream(client)

    for event in feed.stream_prices(providers=["steam", "csfloat"], item_ids=[17464]):
        for item in event.items:
            print(event.provider, item.item_id, item.change, item.price)

import { Configuration, FeedStream } from "cs2cap";

const accessToken = process.env.CS2C_API_KEY;

const feed = new FeedStream(new Configuration({ accessToken }));

for await (const event of feed.streamPrices({
  providers: ["steam", "csfloat"],
  itemIds: [17464],
})) {
  for (const item of event.items) {
    console.log(event.provider, item.itemId, item.change, item.price);
  }
}

curl -N -sS \
  -H "Authorization: Bearer $CS2C_API_KEY" \
  "https://api.cs2c.app/v1/feed/bids?providers=steam&providers=buff163&item_ids=17464"

// EventSource can't send an Authorization header directly. Proxy the request
// through your own backend, or pass a scoped token as a query param if your
// deployment supports it — do not embed a raw API key in client-side code.
const source = new EventSource(
  "https://api.cs2c.app/v1/feed/bids?providers=steam&providers=buff163&item_ids=17464",
);

const bestBid = new Map(); // keyed by `${item_id}:${provider}`

source.addEventListener("bids.changed", (event) => {
  const { provider, items } = JSON.parse(event.data);
  for (const item of items) {
    const key = `${item.item_id}:${provider}`;
    if (item.change === "removed") bestBid.delete(key);
    else bestBid.set(key, item.price);
  }
});