> For the complete documentation index, see [llms.txt](https://gitbook-docs.coinmetrics.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-docs.coinmetrics.io/market-data/methodologies/trusted-exchange-framework.md).
# Trusted Exchange Framework
## Introduction
The Coin Metrics’ Trusted Exchange Framework (TEF) is a quantitative evaluation of crypto exchanges. We leverage the CM Market Data Feed and our extensive experience from collecting data to create a rigorous assessment across several key categories. The TEF serves as both a guideline for exchange quality as well as an input to [Market Data Pro](https://coinmetrics.io/market-data-pro/) and [CM Prices](https://coinmetrics.io/prices/), and [Indexes](https://coinmetrics.io/cmbi/).
The documentation supporting this framework can be found via the link below.
**Landing Page**
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**Methodology**
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