Gemini launches public predictions market volume API, opening data floodgates for developers

Gemini just made its prediction market trading data available to anyone with an internet connection. The exchange launched a public REST API endpoint on July 30 that serves up trade volume data organized by category, broken down by day or hour in UTC. The key word here is “public.” No authentication required. No API keys, no account creation, no hoops. If you can make an HTTP request, you can pull Gemini’s prediction market volume data. Why this matters beyond the technical plumbing Gemini Predictions launched on December 16, 2025, as a CFTC-approved Designated Contract Market, which means it operates under the same regulatory framework as traditional futures exchanges. That distinction allowed it to roll out across all fifty US states from day one. The platform initially offered fee-free trading to bootstrap activity. By July 2026, Gemini Predictions has surpassed $24 million in cumulative trading volume and crossed 10,000 active users. April 2026 was particularly strong, with trading volume jumping 78% month-over-month. The revenue picture and Gemini’s broader momentum In Q1 2026, Gemini reported total revenues of $50.3 million, a 42% year-over-year increase. The prediction marke...