# Fion Developer API

## Required Authorization

All API requests are required to provide authorization in the form of API keys. 

API keys are obtained from the contacting Fion. They should be passed in the authorization as a Bearer token.

## Authorization Example

<mark style="color:blue;">`GET`</mark> `https://api.fion.tech/example`

This example shows how to pass the API key in requests. It is allowed to include additional query parameters as well.

#### Headers

| Name      | Type   | Description |
| --------- | ------ | ----------- |
| x-api-key | string | \<api\_key> |

{% tabs %}
{% tab title="200 Server will continue to process business logic if authorization is successful" %}

```
Server will return intended response.
```

{% endtab %}

{% tab title="401 Server will return this error when the API key is missing or no longer active." %}

```
{ message: "Unauthorized" }
```

{% endtab %}
{% endtabs %}