> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metrixllm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API Keys

> Create and manage API keys in the dashboard.

The **API Keys** page is where you manage all credentials for applications connecting to the MetrixLLM gateway.

## Creating a Key

1. Click **Create API Key**.
2. Enter a descriptive **name** (e.g. `iOS App - Production`, `Backend Service`).
3. Click **Create** — the key is displayed **once**. Copy it immediately.

<Warning>
  The key value is shown only at the moment of creation. If you didn't copy it, revoke the key and create a new one.
</Warning>

## The Key Format

All MetrixLLM API keys begin with `mtx_`. This prefix ensures your code never accidentally sends a raw provider key (like `sk-...`) through the gateway.

## Revoking a Key

Click the **Revoke** button next to any key to immediately invalidate it. Active requests using that key will fail with a `401 Unauthorized` error within seconds.

## Viewing Key Usage

Each key in the table shows its **last used** timestamp and the total request count. Click on a key to see a filtered view of its request logs and cost breakdown.