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Fonrex
Self-hosted API for prices, fundamentals, and indicators
What it is
An open-source financial data API you run yourself with Docker, exposing REST and WebSocket endpoints on your own machine. It serves end-of-day and historical prices per listing, news, server-side technical indicators, fundamentals, and a discounted-cash-flow valuation, and it can feed Google Sheets, OpenBB, or a Zipline backtest. Quant developers and analysts who want European and US listings inside infrastructure they control are the audience. Upstream series come from Yahoo Finance, scraped sites, SEC EDGAR, and JustETF rather than a licensed consolidated feed, and every request requires an API key.
At a glance
Worth watchingOur rating, based on popularity, maintenance and how ready it is for real use.
| Best for | Professional quants |
|---|---|
| Used for | Data source, Data analysis |
| Markets | US equities, Other markets |
| Stack | Python, Docker |
| Learning curve | Moderate learning curve |
| Practical value | Medium practical value |
| Cost | Free and open source |
| Hardware | No GPU needed |
Self-hosted financial data API for European and US markets: prices per listing, cross-checked fundamentals from 18 sources, DCF valuation and Fama/French factors in your own
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