toolgrep / APIs & backend / MarketMaster
Alternatives to MarketMaster
MarketMaster: One normalized prediction market API for Kalshi and Polymarket. 8 products similar to MarketMaster, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 8 of 8 offer an MCP server, 1 of 8 is open source.
- Octagon
Prediction market research and analytics comparing model probabilities to live Kalshi and Polymarket prices, cited to source.
- PMWallets
Polymarket MCP server and CLI for AI agents: trader leaderboard, trader records, and real-time fill feed
- pdata
Read-only aggregator of live prediction-market data across 8 platforms, exposed via REST, MCP, and read-only Postgres.
- Knoww
Prediction markets for every opinion
- FinancialData.Net
Stock Market API & Financial Data API
- AlphAI
Financial news API for trading bots and AI agents
- PayAPI Market
x402 marketplace for AI agents
- APIVerve
One key for 300+ production APIs
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| MarketMaster | Freemium · from $0 | yes | yes | yes | yes | no |
| Octagon | Freemium | yes | yes | yes | yes | no |
| PMWallets | Freemium | yes | yes | yes | yes | yes |
| pdata | Free | yes | yes | yes | yes | — |
| Knoww | Free | yes | yes | yes | — | — |
| FinancialData.Net | Freemium · from $0 | yes | yes | yes | yes | no |
| AlphAI | Freemium · from $0 | yes | yes | yes | yes | no |
| PayAPI Market | Free | yes | yes | yes | yes | — |
| APIVerve | Freemium · from $0 | yes | yes | yes | yes | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/marketmaster/alternatives