What is Vatic API?
Vatic API is a production-grade backend for Polymarket trading. It provides:- Price targets — opening prices for BTC, ETH, SOL, XRP, HYPE, DOGE, and BNB sourced from Chainlink Data Streams and Binance Futures OHLCV.
- Market timestamps — all window boundaries for a given day and interval, with Polymarket slugs and URLs pre-built.
- Fee calculators — both the legacy formula and the April 2025 Polymarket fee structure, with full trade estimates.
- Order management — place, list, and cancel Polymarket CLOB orders authenticated via your trading wallet.
Base URL
Price sources
| Market type | Source | Retention |
|---|---|---|
5min | Chainlink Data Streams | ~14 days |
15min | Chainlink Data Streams | ~14 days |
4hour | Chainlink Data Streams | ~14 days |
1hour | Binance Futures OHLCV | rolling 7 days |
daily | Binance Futures OHLCV | rolling 7 days |
Supported assets
btc eth sol xrp hype doge bnb
WebSocket
Real-time prices are available over WebSocket atwss://api.vatic.trading/ws. Subscribe to receive prices the instant each window opens without polling.