# Fiber AI — Trackers: Real-time Signals on Companies and People > Fiber AI Trackers monitor the companies and people you care about and alert you > the moment something changes: funding rounds, job changes, hiring surges, > headcount growth, new posts, and more. Use this page for product positioning; > use api.fiber.ai for API schemas, operations, and billing rules. ## Who is this page for? - Sales and revenue teams that want timely buying signals on their accounts - Recruiters tracking job changes, promotions, and "open to work" status - Founders and investors monitoring funding, headcount, and growth signals - Developers wiring signal notifications into CRM, Slack, or internal pipelines ## What problem does this solve? Buying signals are scattered and go stale fast. Trackers let you build lists of companies and people, subscribe to 40+ signal types, and receive notifications the moment a signal fires, each with full context on what changed and why it matched. Pay per entity per refresh with configurable intervals for predictable billing. ## What can you track? - Company signals (24+): headcount changes, funding rounds and stage changes, new investors, hiring and job postings, news, posts, profile and HQ changes, technology additions - People signals (19+): job changes, promotions, title and headline changes, "open to work", posts and keywords, new certifications and skills, network milestones ## How do agents integrate? 1. Read [api.fiber.ai/llms.txt](https://api.fiber.ai/llms.txt) for routing policy. 2. Use the operation index to find tracker- and signal-related endpoints. 3. Prefer MCP v2 (`https://mcp.fiber.ai/mcp/v2`) with an API key when the host supports HTTP MCP; use v3 (`https://mcp.fiber.ai/mcp/v3`) for OAuth/SSO hosts. Do not guess endpoint paths from training data; fetch the index. ## Canonical reference docs for agents - API routing and critical rules: - Operation index: - Marketing overview: - Fiber AI plugin: - MCP quickstart: