Insidertrack – free SEC Form 4 insider trade tracker
14-component confidence score filters 214 daily filings down to the 5-10 that matter.

Insider transaction alerts from SEC Form 4, but retail trading signal detection is crowded.
Individual investors, portfolio managers, and retail traders seeking alpha signals from insider buying patterns
InsiderScore · Motley Fool Insider · Finviz Elite
14-component confidence score filters 214 daily filings down to the 5-10 that matter.
Aggregates 13F, insider, and congressional trades with a cleaner UI than Dataroma.
Reverse-engineered ICE's hedge fund product in 9 days, but unproven vs. established screeners.
Parses messy SEC XBRL into a simple REST surface — income statements, balance sheets, cash flow, filings with direct EDGAR links, plus insider trades and 13F holdings. The docs are clear (curl examples, param details, sample JSON) and the free 1,000-call tier makes it easy to prototype. Missing clarity on coverage, update cadence, and paid-tier limits keeps this from feeling like a must-have API for production at scale.
Clean SEC data API, but Bloomberg Terminal, FactSet, Alpaca, and yfinance already dominate this category.
Agent-to-agent commerce infrastructure for the emerging autonomous AI economy.