# Winthrop's Token Audit

Deterministic analysis of a Claude API usage CSV (developer Console at platform.claude.com, then Analytics, then Usage; pick a time range and Export. For API-billed usage, not claude.ai subscriptions, and not the claude.ai privacy export, which is conversation data). Upload the .csv or paste its contents. Prices every token against the current rate card and identifies savings: prompt caching, model tiering, Batch API. No LLM involved; data expires after 60 days. Free summary; full report $19; the fee is declined below $19 of identified savings.

Run it: https://winthropic.com/audit
Machine route: POST the CSV to https://winthropic.com/api/audit (see https://winthropic.com/openapi.json)