A research-agent ranking of 8 stock-data MCP servers puts Equibles first
DanielAPO · reddit · 2026-07-28
- The author scored eight stock-market-data MCP servers after running into the same problem while building research agents: most “best API” lists focus on price feeds, which don’t answer many research questions.
- They argue that questions like congressional trading before a guidance cut, or export-language changes in holdings, require filing text and disclosure records rather than quotes.
- The rubric uses six criteria: primary-source access, disclosures, breadth per connection, cost of the first useful query, ergonomics, and market-data depth.
- A comparison table ranks Equibles first, followed by Financial Modeling Prep and Alpaca, then Polygon, Unusual Whales, Alpha Vantage, Databento, and EODHD.
- The most important takeaway is that very few servers let an agent search inside filing text and quote it back with a position; without that, the agent can only guess.
- The post then summarizes what each server actually covers, such as filings, congress trades, earnings calls, 13F, options chains, and live equities.
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