# Received APIs Intro

Received's API operates on a REST architecture, featuring resource-oriented URLs for easy navigation. It accepts form-encoded request bodies and delivers JSON-encoded responses. Standard HTTP response codes, authentication methods, and verbs are utilized throughout.

#### API Headers

{% hint style="info" %}
API calls, except for Authentications, must include the next headers

1. **Bearer Token** - return from the login call 
2. **API Version** - {"Version": "V0"}
   {% endhint %}

#### Current version

{% code lineNumbers="true" %}

```javascript
{"Version": "V0"}
```

{% endcode %}

#### **Start using with Swagger UI:**

{% hint style="info" %}
<https://api.received.ai/swagger/>
{% endhint %}


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

```
GET https://docs.received.ai/api-docs/received-apis-intro.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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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.