# Winthropic

> Independent daily evaluation of Anthropic's Claude models on a fixed, versioned task battery. Measures drift and variance over time. Not affiliated with Anthropic.

Every page is also available as markdown: append .md (for example https://winthropic.com/about.md), or request the HTML path with Accept: text/markdown.

## Core

- [The Index (home)](https://winthropic.com/index.md): today's readings and the longitudinal trace
- [Methodology](https://winthropic.com/methodology.md): versioned battery, deterministic scoring, frozen request shape
- [About](https://winthropic.com/about.md): who and what runs this instrument

## Services

- [Winthrop's Token Audit](https://winthropic.com/audit.md): deterministic audit of Claude API spend (caching, tiering, batch savings); free summary, full report $19

## Data

- [Index API](https://winthropic.com/api/index.json): all readings, JSON
- MCP server at https://winthropic.com/mcp (Streamable HTTP): add with `claude mcp add --transport http winthropic https://winthropic.com/mcp` and ask "did Claude drift?"
- Machine-buyable audit: POST a usage CSV to https://winthropic.com/api/audit for a free teaser and an HTTP 402 with payment rails; pay to GET the itemized findings as JSON
- [OpenAPI spec](https://winthropic.com/openapi.json)
- [RSS](https://winthropic.com/feed.xml) and [JSON Feed](https://winthropic.com/feed.json): one entry per daily run