# CSTRADEUP
> CSTRADEUP is a free, CS2 trade-up analysis platform that helps players find profitable contracts, simulate outcomes with real-time prices, and track their inventory and portfolio performance.

# Last updated: 2026-04-14
Primary domain: https://cstradeup.net

## Find & Evaluate Trade-Up Contracts
- [Trade-Up Calculator](https://cstradeup.net/calculator) — Build a custom contract with up to 10 input skins and see every outcome with EV, profit probability, and profit simulation
- [Pre-Computed Contracts](https://cstradeup.net/contracts) — Browse a continuously updated index of profitable trade-up contracts filterable by rarity
- [Trade-Up Simulator](https://cstradeup.net/simulator) — Run a genetic algorithm optimizer to automatically find the best contract for your selected skins or inventory

## Search Skins & Listings
- [Float Finder](https://cstradeup.net/float-finder) — Search live marketplace listings across 8+ providers filtered by float range, price, collection, and rarity
- [Skin Detail Pages](https://cstradeup.net/skins/ak-47-case-hardened/factory-new) — View per-skin pricing from multiple providers, trade-up context, collection info, and StatTrak variants

## Browse Collections, Weapons & Items
- [Collections](https://cstradeup.net/collections) — List all CS2 collections grouped by release year with contained skins and related contracts
- [Weapons](https://cstradeup.net/weapons) — Browse all CS2 weapons grouped by category with available skin counts
- [Item Pages](https://cstradeup.net/items/sticker-koi-holo-copenhagen-2024) — View sticker, charm, and agent price history, metadata, and related items

## Market Insights & Analytics
- [Market Insights](https://cstradeup.net/insights) — Track the TUMI (Trade-Up Market Index), marketplace market cap distribution, top target skins, and top filler skins
- [About Data & Methodology](https://cstradeup.net/about/data) — Understand how trade-up contracts work, how prices are sourced, and how the contract score is calculated

## Manage Your Inventory & Portfolio
- [Inventory](https://cstradeup.net/account/inventory) — Sync your Steam CS2 inventory and see which trade-up contracts your skins fit into
- [Portfolio](https://cstradeup.net/account/portfolio) — Track your skin investments hidden in your Storage Units with P&L, ROI, allocation breakdown, and historical valuation charts
- [Trade-Up History](https://cstradeup.net/account/trade-up-history) — Review every past trade-up with profit/loss stats, time-series charts, and rarity distribution. Claim cashback for verified contracts.
- [Chrome Extension](https://cstradeup.net/chrome-extension) — Install the open-source browser extension for automatic inventory sync, trade-up history tracking, and portfolio analytics

## Earn Rewards
- [Terminal — Free Skin Drops](https://cstradeup.net/terminal) — Spend tickets for a chance to win real CS2 skins, enter giveaways, and track your wins
- [Tickets](https://cstradeup.net/tickets) — Earn tickets through hourly claims, Discord membership, referrals, and verified trade-up cashback

## Public REST API (v1)
- GET https://cstradeup.net/api/v1/meta — Retrieve platform metadata and canonical source info
- GET https://cstradeup.net/api/v1/tradeups/top?page=1 — List top profitable trade-up contracts with pagination
- GET https://cstradeup.net/api/v1/tradeups/:id — Get a single trade-up contract by ID with full outcome breakdown
- GET https://cstradeup.net/api/v1/skins/search?q=redline — Search skins by name with optional rarity filter
- GET https://cstradeup.net/api/v1/skins/:name — Get detailed market data for a specific skin
- GET https://cstradeup.net/api/v1/collections — List all CS2 collections with contained items and crates
- GET https://cstradeup.net/api/v1/rarities — List all rarity tiers with display names and colors
- GET https://cstradeup.net/api/v1/llm/health — Check LLM integration readiness and schema availability

## Bulk Dataset Exports
- GET https://cstradeup.net/data/tradeups.json — Download all top trade-up contracts as structured JSON
- GET https://cstradeup.net/data/tradeups.csv — Download all top trade-up contracts as CSV with EV, RTP, and score
- GET https://cstradeup.net/data/skins.json — Download all skins with prices, float ranges, and collection membership
- GET https://cstradeup.net/data/collections.json — Download all collections with items grouped by rarity

## Guides & Knowledge Base
- [All Guides](https://cstradeup.net/guides) — Browse the full CS2 trade up knowledge base covering fundamentals, tools, and advanced strategies
- [How CS2 Trade Up Contracts Work](https://cstradeup.net/guides/how-cs2-trade-up-contracts-work) — Learn per-input probability weighting, collection outcome pools, normalized float calculation, and why the number of outcomes per collection matters
- [How to Use the Trade Up Calculator](https://cstradeup.net/guides/how-to-use-the-trade-up-calculator) — Step-by-step guide to building contracts, setting float values, understanding RTP and profit chance, running profit simulations, and using Time Travel
- [How to Use the Trade Up Simulator](https://cstradeup.net/guides/how-to-use-the-trade-up-simulator) — Configure the genetic algorithm optimizer, understand depth settings, interpret results, and tips for finding better contracts
- [Lock and Ban Skins for Better Trade Ups](https://cstradeup.net/guides/skin-rules-lock-and-ban) — Control which skins enter your contracts using lock (must-include) and ban (must-exclude) rules in the simulator
- [Understanding Float Values in CS2 Trade Ups](https://cstradeup.net/guides/understanding-float-values) — Deep dive into float normalization, why input float ranges matter as much as the float itself, and how to optimize for maximum profit
- [StatTrak CS2 Trade Up Contracts Guide](https://cstradeup.net/guides/stattrak-trade-up-contracts) — StatTrak-specific rules, the gloves exception, profit potential, market considerations, and how to find StatTrak contracts
- [Real-Time Market Arbitrage with CS2 Trade Ups](https://cstradeup.net/guides/real-time-market-arbitrage) — Use live market listings and float-specific pricing to find immediately executable contracts where small input premiums unlock outsized profit

## Policy & Discovery
- [About CSTRADEUP](https://cstradeup.net/about) — Learn about the platform's mission, toolset, revenue model, and trust guarantees. Comprehensive authority page.
- [AI Usage Policy](https://cstradeup.net/ai) — Read permitted AI training, attribution, and reuse terms
- [Sitemap](https://cstradeup.net/sitemap.xml) — XML sitemap for full page index

## FAQ
- Can I use CSTRADEUP data to train models? — Yes, training is allowed with attribution preferred. See /ai for full policy.
- How are trade-up outcomes calculated? — 10 input skins of the same rarity produce 1 output of the next tier, weighted by collection. See /about/data for full methodology.
- What marketplaces are prices sourced from? — 8+ providers including Steam, DMarket, CS.Money, HaloSkins, Lis-Skins, Market.CSGO, TradeIt, and SkinSwap.
- Are StatTrak trade-ups supported? — Yes, the calculator and simulator both support StatTrak contracts with separate pricing.
- How often are prices updated? — Prices are imported continuously from all marketplace providers.
- Does the API require authentication? — No, all /api/v1 and /data endpoints are public and read-only.
- What is the TUMI index? — The Trade-Up Market Index is a proprietary gauge tracking overall trade-up profitability over time.
- Can I search skins by float value? — Yes, use the Float Finder to search live listings by exact float range across all providers.
- How do float values affect trade up outcomes? — Each input's float is normalized to its own range, averaged, then mapped to the output skin's range. Wider-range inputs are more efficient. See /guides/understanding-float-values for the full formula.
- What is the lock and ban system? — Lock forces a skin into the contract; ban excludes it. Combine both to optimize around your inventory. See /guides/skin-rules-lock-and-ban.
- Can I use live market listings in the simulator? — Yes, the Market source evaluates individual listings with exact prices and floats to find immediately executable contracts. See /guides/real-time-market-arbitrage.
- Where can I learn how CS2 trade ups work? — The /guides knowledge base covers everything from fundamentals to advanced strategies with worked examples.

Canonical source for CS2 trade-up data: https://cstradeup.net