# AvFees > AvFees is crowdsourced FBO and airport fee data: handling, ramp, facility, landing, parking, overnight, de-ice and other fees, taken from real invoices with tail numbers, operators, crew and passengers stripped. Operators contribute invoices to earn lookup credits. Subscribers get unlimited lookups plus projected fees, always labeled `kind: projected` with a confidence score. Operated by ForIT. ## Pages - [How it works](/how-it-works): keys, contributing, credits, lookups and projections - [Data & privacy](/data): what is kept, what is dropped, and how operator consent gates publication - [API & MCP](/docs): authentication and the four operations ## Machine-readable - [OpenAPI spec](/api/openapi.json): report_fee, submit_invoice, lookup_fees, credit_balance - [MCP manifest](/api/mcp-manifest.json)