Developer API

CS2 Collection API

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

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Consistent JSON, documented endpoints, source-aware data and product-specific limits.

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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 -H "X-Api-Key: $KEY" "https://www.steamwebapi.com/steam/api/cs/collections"

# PHP

$client = \Symfony\Component\HttpClient\HttpClient::create();

$res = $client->request('GET', 'https://www.steamwebapi.com/steam/api/cs/collections', ['headers' => ['X-Api-Key' => $KEY]]);

$data = $res->toArray();

# Node.js

const r = await fetch(`https://www.steamwebapi.com/steam/api/cs/collections`, { headers: { 'X-Api-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.