Does Valve have a CS2 API?

Valve's Steam Web API covers accounts, inventories and some game stats. It does not provide pro esports matches or player ratings.

What is CS2 Game State Integration?

GSI makes a CS2 client send its own game state to a local endpoint, which is useful for overlays of a game you are playing or observing. It does not list other matches.

Can I get CS2 skin prices from Steam?

Steam covers its own market. This API adds third-party marketplaces, sell listings and daily history for each skin.

Does this API read Steam inventories?

No. Fetch the inventory from Steam, then price each item with /cs2/skins.

Is this API affiliated with Valve?

No. CS2 API is operated by Cito API and is not affiliated with Valve Corporation.

SkinsPrices on 16 marketplaces

What the Steam API does not give you.

Valve's Steam Web API covers accounts, inventories and some game stats, and Game State Integration streams your own game client. Neither covers pro matches, and the Steam Market is one price among many.

Get a free API key Read the CS2 docs

Pro esports data
Skin prices across markets
500 free requests / month

GET /cs2/skins/trending?limit=2200 OK

$ curl "https://api.citoapi.com/api/v1/cs2/skins/trending?limit=2" \ -H "x-api-key: $CITO_API_KEY"

{  "data": {    "gainers": [      ...      {        "marketHashName": "★ StatTrak™ Shadow Daggers | Crimson Web (Battle-Scarred)",        "currentPrice": 145.68,        "change7d": 47.82      }    ]  }}

Seamless Integration with our MCP Server

Give Claude, Cursor and ChatGPT the CS2 data. One command writes the MCP config; agents call live scoreboard, team map stat, opening duel and transfer tools instead of inventing match IDs, and your key stays on your machine.

MCPInstall the Cito MCP server

The CS2 data Steam does not have

Pair Steam for accounts and inventories with this API for esports and prices.

Pro match data

Results, maps and box scores from pro matches.

Live pro scores

Every tracked match in progress, not just your client.

Player stats

Ratings, ADR and KAST for pro players.

Cross-market prices

Steam and third-party marketplaces side by side.

Price history

Daily prices going back years on long-listed skins.

No inventories

Inventories stay with Steam; this API prices what is in them.

Steam, GSI and a CS2 API

Need	Steam Web API / GSI	CS2 API (Cito)
Pro match results	Not covered	Yes, with box scores
Live pro scores	GSI streams only a client you run	Every tracked match
Player inventories	Yes	No
Skin prices	Steam Community Market only	Steam plus third-party markets
Price history	Steam Market only	Daily cheapest across markets
Pro player ratings	Not covered	Rating, ADR, KAST per map

Endpoints you can ship with

Esports and skin prices: the parts Steam leaves out.

Skin prices

The current price of a skin on each marketplace, its daily price history, sell listings across markets, and the week's biggest movers.

View docs

GET/api/v1/cs2/skins?q={name}
Search skins by name, weapon, rarity or price range.
GET/api/v1/cs2/skins/{skinIdOrSlug}/prices
The current price on each marketplace, cheapest first, with offer counts.
GET/api/v1/cs2/skins/{skinIdOrSlug}/history
Daily cheapest price across marketplaces, years back on long-listed skins.
GET/api/v1/cs2/skins/{skinIdOrSlug}/order-book
Sell listings per marketplace with counts, and the lowest ask.
GET/api/v1/cs2/skins/trending
Biggest gainers and losers over 1 day to 1 year, with sparklines.
GET/api/v1/cs2/skins/{skinIdOrSlug}
One skin: weapon, rarity, collection, image and price summary.

FAQs

Steam, GSI, inventories and prices

Can't find what you're looking for? Contact our customer support team

Next steps

See pricing

Add to Steam pro results

Keep Steam for accounts. Use this for everything else CS2.

Get a free CS2 API key