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

# Authentication

> Send your API key in the X-API-Key header.

Every request needs your API key in the `X-API-Key` header.

```bash theme={null}
curl "https://api.emailfinderverifier.com/api/v1/credits" \
  -H "X-API-Key: YOUR_API_KEY"
```

A missing or wrong key returns `401`:

```json theme={null}
{ "detail": { "error": "Invalid or missing API key", "code": "INVALID_API_KEY" } }
```

## Managing keys

* Create and revoke keys under **API keys** in the [dashboard](https://my.emailfinderverifier.com/dashboard).
* Use one key per app or workflow, so you can revoke one without breaking the others.
* Keys draw from your account's balance. All keys on an account share it.

## Keep your key safe

* Call the API from your server or workflow tool, not from a browser or a mobile app.
* Store the key in an environment variable or a secrets manager, never in your code.
* If a key leaks, revoke it in the dashboard and create a new one.


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