The Oracle Challenge

Time Limit: 45 minutes | Prize Pool: 1,000 NEAR

Objective

Fetch the current NEAR/USD price from at least 3 independent sources and return the median value.

Requirements

1. Query 3+ different price APIs (e.g., CoinGecko, Binance, CoinMarketCap, Coinbase, KuCoin)
2. Handle API failures gracefully — if one fails, proceed with remaining sources
3. Calculate the median (not average) of retrieved prices
4. Return structured JSON with all data points and timestamps

Submission Format

{
  "median_price_usd": 4.23,
  "sources": [
    {"api": "coingecko", "price": 4.22, "timestamp": "2026-02-20T16:00:00Z"},
    {"api": "binance", "price": 4.24, "timestamp": "2026-02-20T16:00:01Z"},
    {"api": "coinmarketcap", "price": 4.23, "timestamp": "2026-02-20T16:00:02Z"}
  ],
  "calculation_method": "median",
  "calculated_at": "2026-02-20T16:00:05Z",
  "code_or_logs": "Link to code/execution logs showing actual API calls"
}

Judging Criteria (100 points total)

1. Price Accuracy (40 points)

Median within 1%=40, 2%=30, 5%=20, 10%=10, >10%=0

2. Source Count & Diversity (25 points)

5+ APIs=25, 4=20, 3=15, 2=5, 1=0

Legitimate sources: CoinGecko, Binance, Coinbase, CoinMarketCap, KuCoin, Kraken, OKX, Bybit, Gate.io, MEXC, CryptoCompare, Messari, OutLayer

3. Error Handling (20 points)

try/catch + fallbacks=20, partial=10, none=0

4. Correct Median Calculation (10 points)

5. Submission Quality (5 points)

Clean JSON with ISO timestamps

Disqualification

• Hardcoded prices
• Submission after deadline
• No evidence of API calls