Developer API

CS2 Collection API

Every CS2 case, capsule and collection — with their drop pools, rarity distribution and live prices — through one REST endpoint.

Start building for free API Reference

CS2 Collection API endpoints

All endpoints return documented responses and use the same Steamwebapi key parameter.

GET /steam/api/cs/collections

GET /steam/api/cs/collection/{slug}

GET /steam/api/cs/containers

CS2 Collection API — quickstart

Use the same Steamwebapi key parameter as every other documented endpoint. Get an API key from the dashboard and send your first request in minutes.

→ One API key, documented responses.
→ Rate limits scale with your plan tier.
→ Full schema in the API Reference.

API Request

# curl with API key

curl "https://www.steamwebapi.com/steam/api/cs/collections?key=$KEY"

# PHP

$res = file_get_contents('https://www.steamwebapi.com/steam/api/cs/collections?key=' . $KEY);

$data = json_decode($res, true);

# Node.js

const r = await fetch(`https://www.steamwebapi.com/steam/api/cs/collections?key=${KEY}`);

const data = await r.json();

About this API

The Collection API gives you the full set list for any CS2 container, capsule or collection: which items are inside, their rarity, drop weights, and current market prices. Plug it into a case-opening tool, a portfolio valuation engine, or a meta-database for the CS2 economy.

Use /steam/api/cs/collections for the index and /steam/api/cs/collection/{slug} for a single set.