Market Data API for Stocks, Forex, Crypto & Commodities | SiftingIO

# SiftingIO SiftingIO is a market data platform that delivers real-time and historical data for stocks, FX, crypto, commodities, DEX, and on-chain markets through REST and WebSocket APIs. Where multiple independent sources are available, prices are aggregated across them, and data is normalized into one unified JSON schema, so supported asset classes share a consistent set of fields, auth model, and integration flow. Teams use SiftingIO to power trading systems, dashboards, research, backtesting, financial applications, and enterprise data workflows without maintaining separate vendor feeds. ## Core product - Real-time market data - Historical market data - REST API access - WebSocket market data streams - Stocks market data - FX market data - Crypto market data - Commodities market data - DEX market data - On-chain market data - Aggregated market data across available sources - Unified JSON schema across asset classes - One API key and one auth model across supported data feeds ## Products - Cryptocurrency: real-time and historical crypto prices, trades, quotes, and OHLCV candles aggregated where multiple sources are available - US equities: real-time and historical quotes for stocks, ETFs, and ADRs, with corporate actions and standardized fundamentals where available - Foreign exchange (FX): real-time and historical FX quotes across majors, minors, and selected exotics - Commodities: spot prices across metals, energy, and agricultural markets - DEX: decentralized exchange swap-level activity and pool state - On-chain fundamentals: TVL, supply, holders, and protocol-level metrics ## Core capabilities - Unified JSON schema across crypto, equities, FX, commodities, DEX, and on-chain data - REST API and WebSocket streams sharing one auth model - Historical data, including tick-level history and OHLCV candles at supported resolutions - Aggregation, de-duplication, and normalization where multiple sources are available - Globally distributed, multi-region infra

openapi: 3.1.0 info: title: SiftingIO Market Data API version: "1.0.0" description: | REST data-plane for the SiftingIO market data API: live prices, SEC fundamentals (filings, XBRL financials, ratios, insiders, ownership), historical OHLCV bars, market calendars, DEX wallet portfolios, and the US economic calendar. Authentication is by API key, sent as the `X-API-Key` header (preferred) or the `api_key` query parameter. Several endpoints return large payloads