FinFeedAPI blog

Welcome to the FinFeedAPI Blog. Here you’ll find fresh insights and helpful guides for anyone using our APIs — from stocks and crypto to prediction markets, forex, and more.
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      Product Features

      What Prediction Market Exchanges Does FinFeedAPI Integrate With?

      Explore the leading prediction market exchanges: Polymarket, Kalshi, Manifold, Myriad, and Hyperliquid and learn how FinFeedAPI unifies their real-time and historical market data through a single API.
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      General Knowledge

      Can Prediction Markets Predict Better Than Polls?

      Can prediction markets predict better than polls? Discover how historical prediction market data reveals forecasting accuracy, market behavior, and evolving crowd confidence.
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      Product Features

      Backtesting the Crowd: Using Historical OHLCV to Evaluate Market Accuracy

      By combining historical OHLCV, trades, and quotes, researchers can measure whether markets truly become more accurate as resolution approaches and build reproducible backtesting pipelines.
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      Product Features

      10 Things You Should Never Do With Prediction Market Data

      Avoid 10 costly mistakes that affect trading systems, AI agents, and quantitative research, from liquidity and order books to market discovery and cross-exchange analysis.
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      Product Features

      What Is the Difference Between SEC Filing Metadata, Full-Text Search, Extractor, and XBRL Converter?

      SEC filings contain different layers of data. Learn when to use filing metadata, full-text search, the Extractor, and the XBRL Converter and choose the right SEC API endpoint for your workflow.
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      Product Features

      Building an Earnings-Event Monitor with SEC Filings, Stock OHLCV, and Prediction Market Odds

      Learn how to combine SEC filings, stock OHLCV, and prediction market data to build an earnings-event monitor that goes beyond simple price alerts.
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      Product Features

      Replaying the Tape: Using Nanosecond Timestamps to Measure Stock Slippage

      Backtests are only as accurate as their timestamps. Discover how nanosecond market data reveals the true sequence of trades and order flow.
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      How To

      Using Admin Messages to Predict Stock Price Bounces

      FinFeedAPI tracks hidden exchange admin messages and short-sale restrictions, letting you spot the exact moment stock rules change to predict sharp market bounces.
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      How To

      Modeling Bounded Options via HIP-4 Multi-Outcome Streams

      Hyperliquid’s HIP-4 multi-outcome markets let you trade daily price ranges with zero liquidation risk, and FinFeedAPI provides the clean order book data to track them.
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      General Knowledge

      Can Prediction Markets Predict Company Performance Better Than Earnings Forecasts?

      Can prediction markets reveal future company performance before analysts do? Explore how market probabilities capture changing expectations in real time.
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      How To

      How to Build an AI Agent That Understands Real-World Events Before the News Does

      Learn how to build AI agents that use prediction market data to understand real-world events before they become headlines.
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      How To

      Tracking Hyperliquid HIP-4: How to Connect Outcome Markets to Your Crypto Projects

      Use live prediction data to track probabilities, arbitrage gaps, and build event tools. Learn how APIs like FinFeedAPI bring multi-venue data into your project.
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      How To

      Unified Pipelines for Fragmented Prediction Markets

      Standardizing your data pipeline is the only way to scale prediction market apps without constantly rewriting your database infrastructure.
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      General Knowledge

      How Can Companies Use Prediction Markets for Risk Monitoring and Strategic Decision-Making?

      Learn how analysts and strategy teams use Prediction Markets APIs to track risk, measure conviction, and monitor changing expectations.
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      New Integration

      What Is Behind Hyperliquid Outcome Markets and Why Developers Are Paying Attention?

      Hyperliquid HIP-4 brings outcome markets into crypto-native trading infrastructure. Learn why developers and data teams are paying attention.
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      Exchanges

      What Are Hyperliquid Outcome Markets? HIP-4 Prediction Contracts Explained

      Hyperliquid’s HIP-4 introduces prediction markets natively onto the HyperCore engine. Learn how this cross-margined architecture operates and how to stream its real-time event data via FinFeedAPI.
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      Exchanges, New Integration

      Hyperliquid HIP-4 for Builders: How Developers Can Use Outcome Market Data

      Build tools with real-time prediction markets data. Learn how Hyperliquid's HIP-4 outcome markets work and how unified APIs stream live probability signals to developers.
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      Exchanges, General Knowledge

      Why Hyperliquid Outcome Markets Matter for Prediction Market Data APIs

      Track live probability metrics to power trading bots, dashboards, and AI models. Learn how APIs like FinFeedAPI bring Hyperliquid outcome markets into your system.
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      Exchanges

      How Hyperliquid HIP-4 Outcome Markets Work: Yes/No Tokens, Settlement and Order Books

      Hyperliquid’s HIP-4 introduces fully collateralized outcome contracts with zero liquidation risk. Its merged order book unifies YES and NO liquidity into a single pool for cross-market hedging.
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      Exchanges

      Hyperliquid HIP-4 vs. Polymarket and Kalshi: How Outcome Markets Compare

      Let's compare Hyperliquid’s HIP-4 outcome markets against Polymarket and Kalshi, highlighting its native L1 architecture, merged order books, and zero-liquidation mechanics.