defeat-beta/defeatbeta-api

An open-source alternative to Yahoo Finance's market data APIs with higher reliability.

What it solves

Defeat Beta API provides a reliable, high-performance alternative to Yahoo Finance's market data APIs. It eliminates common scraping issues and rate limits by hosting market data on Hugging Face and using a high-performance OLAP engine for sub-second analytical queries.

How it works

The system is powered by DuckDB's OLAP engine and the cache_httpfs extension, allowing it to query a large-scale financial dataset hosted on Hugging Face. It provides a Python API for fetching stock prices, financial statements, SEC filings, and earnings call transcripts.

Who it’s for

Financial analysts, quantitative traders, and AI developers who need stable, reproducible market data and automated valuation tools.

Highlights

  • Extended Financial Data: Access to TTM EPS, Market Cap, ROE, ROIC, WACC, and revenue breakdowns by segment and geography.
  • Automated DCF Valuation: Generates professional Excel outputs for Discounted Cash Flow analysis, including 10-year cash flow projections and fair price estimates.
  • LLM Integration: Built-in capabilities to use Large Language Models to analyze earnings call transcripts and quarterly financial changes.
  • AI Accessibility: Includes an MCP server implementation and "Skills" for integration with AI platforms like Claude.ai and Manus.

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