# Metric Reference Overview

This section defines the public growthepie metrics one by one. Each metric page answers the same questions in the same order: what the metric means, which `metric_id` and `metric_key` values are canonical, what unit the metric uses, whether hourly data exists, what the main caveats are, and when the metric is the right tool for the job.

## Canonical Metric IDs

* `app_revenue`
* `daa`
* `fdv`
* `fees`
* `market_cap`
* `profit`
* `rent_paid`
* `stables_mcap`
* `throughput`
* `tvl`
* `txcosts`
* `txcount`

## How To Read These Pages

* Use `metric_id` when you are choosing an API path such as `export/{metric}.json`.
* Use `metric_key` when you are reading raw rows returned by flat exports.
* Use `master.json.metrics.{metric_id}` for the live source of truth on supported chains and unit metadata.

## Related Pages

* [What Is metric\_key?](/core-concepts/what-is-metric-key.md)
* [Endpoint: export/{metric}.json](/api-reference/api/export-metric-json.md)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.growthepie.com/metric-reference/metric-reference.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.