> ## Documentation Index > Fetch the complete documentation index at: https://apidoc.cufinder.io/llms.txt > Use this file to discover all available pages before exploring further. # Introduction > Real-time intent signals that tell you exactly when a company is ready to buy. Most teams find out a company was in-market about three weeks too late. **Buying signals** fix that. They are real-world events, a funding round, a new VP of Sales, a first-ever job posting in a new function, that tell you a company just changed in a way that creates need, budget, or urgency. CUFinder tracks **99 signals** across company pages, people moves, and composite patterns, refreshed daily against a base of 1B+ people profiles and 85M+ company profiles. This documentation is the complete reference: every signal has its own page with the exact trigger condition, stored fields, magnitude, interpretation, and an outreach playbook. Why timing beats static lists, and how signals change the way you prospect. Snapshots, deltas, and the emit logic behind every signal. How we rank signal strength so you can filter ruthlessly. Every signal in one searchable table, grouped by category. ## Signal families Growth, decline, identity, categorization, location, structure, funding, and activity, derived from company Professional Network pages. Hires, departures, promotions, and executive moves derived from individual profiles. High-confidence patterns like IPO, acquisition, expansion, and momentum that combine smaller events. ## Start tracking signals Sign up free and start enriching your lists with buying signals built in. No credit card required.