CSFloat API

Float-first CS2 marketplace where each listing carries its wear value. Get CSFloat's lowest ask and listing count for 28,001 CS2 items, refreshed every 5 minutes - in the same response as Steam and 11 other marketplaces. Grab a free key or read the docs.

Why read CSFloat through this API

CSFloat lists rare knives and StatTrak variants that never appear in Steam’s own market browse - several hundred items in our catalog exist only because CSFloat quoted them first.

Because CSFloat is organised around float values, its catalog reaches deeper into high-tier knives than Steam’s search index does. We use it both as a price source and as a discovery source: a priced name we have never seen becomes a catalog item.

The point of a single API is that you are not maintaining 12 integrations. CSFloat arrives in the same shape as every other market: minor units, a currency, a listing count and a capture timestamp. Switch ?currency=EUR and every market converts together.

What you get for each CSFloat item

• Lowest ask - the cheapest live listing, in integer minor units (no floats, no rounding drift).
• Listing count - how many listings sit behind that price, so you can tell a real floor from one lucky listing.
• Capture timestamp - when we last read it, per market. Never a silently stale number.
• Cross-market best - the cheapest venue for that item across all 13 sources, computed for you.
• Doppler phase prices - 626 phase-level quotes from CSFloat.
• Your currency - 30+ currencies via daily ECB reference rates.

Example: CSFloat in a cross-market response

One request returns every market's live price for an item. Prices below were true when this page was built:

curl "https://steamdataapi.com/api/v1/items/AK-47%20%7C%20Redline%20(Field-Tested)/markets" \
  -H "Authorization: Bearer sdk_YOUR_KEY"

{
  "currency": "USD",
  "best": { "market": "csfloat", "price": 2600 },
  "spread": 462,
  "markets": [
    { "market": "csfloat", "price": 2600, "quantity": 3699, "capturedAt": "2026-09-11T08:45:00Z" },
    { "market": "skinbaron", "price": 2672, "quantity": 96, "capturedAt": "2026-09-11T08:45:01Z" },
    { "market": "dmarket", "price": 2703, "quantity": 167, "capturedAt": "2026-09-11T08:31:07Z" },
    { "market": "lisskins", "price": 2705, "quantity": 2622, "capturedAt": "2026-09-11T08:45:01Z" },
    { "market": "youpin", "price": 2721, "quantity": 10000, "capturedAt": "2026-09-11T08:40:17Z" }
  ]
}

At build time CSFloat was asking $26.00 for that item with 3,699 listings - the joint cheapest of all 12 markets quoting it. That gap is exactly what the best and spread fields hand you without comparing anything yourself.

Tracking CSFloat prices over time

A single ask tells you today; a series tells you whether today is unusual. Every market accrues a daily lowest-ask point, so you can pull CSFloat's own history and compare it against Steam's median-sale series - which reaches back to 2013-04-26 and totals 58,843,296 daily points across the catalog.

curl "https://steamdataapi.com/api/v1/items/AK-47%20%7C%20Redline%20(Field-Tested)/history?source=markets&days=90" \
  -H "Authorization: Bearer sdk_YOUR_KEY"

The two series answer different questions. Steam's median is what items actually sold for, which lags but cannot be moved by one optimistic listing. CSFloat's daily low is what you could have bought at. Traders generally want both: the sale price to value a position, the ask to act on one.

From a CSFloat price to a portfolio total

The same prices drive inventory valuation. Give the inventory endpoint a public SteamID and every item comes back priced - at the Steam ask and at cross-market real value, with CSFloat included in the comparison - plus float, paint seed and Doppler phase where they apply, and a portfolio total in your currency.

const res = await fetch(
  "https://steamdataapi.com/api/v1/inventory/76561198000000000?game=cs2&currency=EUR",
  { headers: { Authorization: "Bearer sdk_YOUR_KEY" } },
);
const { totalValue, items } = await res.json();

CSFloat versus the other markets we read

Item coverage differs a lot by venue. These counts are live from our own catalog:

Steam itself is the ninth source: 30,548 CS2 and 5,471 Rust items carry a Steam ask, with median-sale history back to 2013 - 58,843,296 daily points in total.

Frequently asked questions

Start reading CSFloat prices

Free key, no card. Create one, then call /api/v1/items/{name}/markets. Full reference in the docs, limits on pricing.