Trading Data API — agent-ready market data

# Trading Data API (WickedAPI) > Agent-ready trading & market-data API. Real-time crypto/stock prices & OHLCV, indicators (ATR, Fair Value Gaps, ICT liquidity levels), perp funding/OI, order books, Kalshi prediction markets, DeFi TVL, volatility, a verified macro calendar, and an AI momentum score. No fabricated data ever — a source failure returns a real 502/503, never a guessed value. ## Auth — two ways, both work on every /v1 endpoint 1. `x-api-key: YOUR_KEY` header — free, rate-limited. Request a key from the operator. 2. x402 pay-per-call — call with no key at all, receive an HTTP 402 with a USDC price (currently $0.001/request on base), pay via an x402 client, get 200 + data. Settled on-chain via the Coinbase CDP facilitator, auto-listed on the x402 Bazaar. ## Free, no-signup endpoints (no key, no payment, ever) - [GET /v1/kalshi-probability](https://api.wickedapi.com/v1/kalshi-probability): Kalshi prediction-market probabilities - [GET /v1/sentiment](https://api.wickedapi.com/v1/sentiment): Crypto Fear & Greed Index (alternative.me), current reading + optional history - [GET /v1/market-overview](https://api.wickedapi.com/v1/market-overview): CoinGecko global crypto stats (total market cap, 24h volume, BTC/ETH dominance) or top coins by market cap - [GET /v1/gas](https://api.wickedapi.com/v1/gas): Ethereum gas oracle (safe/propose/fast gas prices + base fee, in gwei), via Etherscan - [GET /v1/macro-calendar](https://api.wickedapi.com/v1/macro-calendar): Upcoming US macro events (FOMC rate decisions, CPI, jobs report) with verified Fed/BLS dates, days-until, and Kalshi rate-decision odds (cut/hold/hike) for FOMC meetings ## Paid endpoints (x-api-key or x402) - [GET /v1/kalshi-market](https://api.wickedapi.com/v1/kalshi-market): Single Kalshi market depth: orderbook (yes/no levels) + recent trades for a specific ticker - [GET /v1/funding-oi](https://api.wickedapi.com/v1/funding-oi): Aggregated perpetual-futures funding rate & open interest from Bi

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