> ## Documentation Index
> Fetch the complete documentation index at: https://docs.graylayer.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Updates and new features

## 2025-02 — Initial release

**Platforms**

* Polymarket (Gamma API) — markets, events, tags, series, search, sports
* Polymarket (CLOB API) — order book, prices, spreads, profiles, trades, bridge
* Kalshi — markets, events, orders (read-only), portfolio, RFQ, historical data, multivariate
* Gemini — prediction market categories, events, market data
* Coinbase — spot exchange market data
* Forecastex — IBKR event contract data (read-only)

**WebSockets**

* Polymarket market, user, and sports channels
* Kalshi (proxy handles RSA-PSS auth automatically)
* Coinbase (ticker, level2, heartbeat)
* Gemini

**Infrastructure**

* Per-key rate limiting (`RATE_LIMIT_PER_MIN`)
* CORS configuration
* Kalshi RSA-PSS request signing built into the proxy—clients don't handle Kalshi auth directly