Audience
Algorithmic traders, quantitative researchers, AI agent developers, trading bot builders, market makers, fintech companies, hedge funds, prediction market traders, financial institutions, and developers building automated trading strategies, arbitrage scanners, analytics platforms, and applications across Polymarket, Kalshi, and other prediction markets.
About Predictefy
Predictefy is a prediction-market data and trading infrastructure platform for developers, algorithmic traders, and research teams. Its REST API and SDKs provide a normalized way to retrieve market catalogs, prices, order books, trades, and historical data from supported venues. Users can stream live market updates over WebSockets, compare related markets across venues, and access market-matching and price-discrepancy data. The platform also documents order-building and execution workflows, portfolio and trader analytics, and tools for building automated strategies and AI-agent workflows, including an MCP server. Venue capabilities vary, and some analytics or data features depend on the subscription plan. Predictefy is designed for software teams and traders building research tools, trading bots, market monitors, and applications that use prediction-market data.
Other Popular Alternatives & Related Software
Codex.io
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Codex also provides prediction market data across Polymarket and Kalshi through a single schema. This includes events, markets, traders, holdings, live order books, and trade feeds, along with time-windowed stats and ranking signals (volume, liquidity, open interest, trade count, and unique traders) at 5m through 1w windows that the venue APIs do not expose natively.
Codex is a GraphQL API that most teams query directly, with an optional TypeScript SDK. There is also an MCP server for reading the documentation. Codex offers a free tier (10,000 requests/month), usage-based Growth pricing, and Enterprise plans. Developers use it to build trading platforms.
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Auspex Terminal
Auspex Terminal is a browser-based prediction-market trading workstation offered through a private beta waitlist. It combines data from several venues, including order-book depth, price history, recent trades, and cross-venue spreads net of taker fees and other trading frictions. Traders can inspect arbitrage opportunities, configure basis-point alerts by push, email, SMS, or webhook, and review consolidated positions with P&L, equity, drawdown, closing-line value, and calibration measures. Tools include a Kelly stake calculator, synthetic positions built from related contracts, and a tick tape with replay and nightly Parquet or CSV exports to an external cloud bucket. The interface also provides market news, event monitoring, watchlists, and configurable workspace views. Auspex is designed for prediction-market traders; its public site displays three venues and says access is opening in waves.
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Kalshi
Kalshi is a federally regulated derivatives exchange built for quants. Kalshi’s markets are volatile and settle daily, which means even a small edge can be extremely profitable. Trading is fully-cash collateralized, so you can never lose more than you put into a trade, and contracts can be purchased for as little as $0.01.
Kalshi supports trading through its native app (iOS & Android), website, and API. The latter features extensive documentation, open-sources sample code, and live technical support. Getting started with an algorithmic strategy is as easy as `pip3 install kalshi_python`.
The following data is available for free on both the website and API:
* Historical spreads: Use past pricing data to set up back-tests within minutes.
* Low-latency broadcasts: Receive live updates of market price movements and trade executions.
* Economic projections: Build strategies using Kalshi’s proprietary forecasting tools.
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Melbo
Melbo is a web prediction-market interface for trading shares tied to real-world event outcomes. Each market presents a Yes/No question; share prices reflect the market’s implied probability, and a correctly resolved share pays $1. Users browse markets spanning politics, sports, esports, crypto, business, science and other subjects, and can buy or sell positions before resolution. Accounts use email, Google or Telegram sign-in and include an embedded non-custodial wallet. Users fund it with USDC on Polygon; the minimum trade is $1, and Melbo covers network gas. Trades are routed to third-party smart-contract markets and outcomes are settled through a decentralized oracle. Market orders incur a 1% platform fee plus a category-dependent liquidity fee; limit orders, deposits, withdrawals and payouts are fee-free. The service is for adults 18 and older, subject to geographic restrictions, and trading can result in loss of funds.
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Pricing
Starting Price:
$48.88/month
Pricing Details:
The Free plan includes 25,000 credits per month and does not include commercial use. Builder is $48.88/month or $469.25/year and includes 500,000 credits per month; commercial use is not included. Pro is $149/month or $1,430.40/year, includes 5,000,000 credits per month, and allows commercial use. Enterprise pricing is custom, with a $2,500 minimum.
Free Version:
Free Version available.
Free Trial:
Free Trial available.
Integrations
API:
Yes, Predictefy offers API access
No integrations listed.
Company Information
Predictefy
Founded: 2025
United States
predictefy.com
Videos and Screen Captures
Prediction-market trading screen for France winning the World Cup, with price chart, order book, and trade panel.
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Product Details
Platforms Supported
Cloud
Training
Documentation
Videos
Support
24/7 Live Support
Online
Predictefy Frequently Asked Questions
Q: What kinds of users and organization types does Predictefy work with?
Predictefy works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does Predictefy support in their product?
Predictefy supports these languages: English.
Q: What kind of support options does Predictefy offer?
Predictefy offers support via 24/7 live support and online.
Q: Does Predictefy have an API?
Yes, Predictefy has an API.
Q: What type of training does Predictefy provide?
Predictefy provides training in the form of documentation and videos.
Q: Does Predictefy offer a free trial?
Yes, Predictefy offers a free trial.
Q: How much does Predictefy cost?
Pricing for Predictefy starts at $48.88/month.
