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

Endpoints

All endpoints return JSON, accept the same auth header, and degrade with a normalised error envelope.

GET /steam/api/cs/collections

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

GET /steam/api/cs/containers

CS2 Collection API — quickstart

Same auth header as every other endpoint we ship. Get an API key from the dashboard and you're querying inside two minutes.

→ Single auth header, JSON response.
→ 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.