> **Documentation Index:** Fetch the complete configuration index at https://yandex.com/dev/tech-only/doc/dg/en/llms.txt

# API description

{% note alert %}

All API methods are accessed using a key. Please fill out this simple [form](https://yandex.com/dev/dictionary/keys/get/?service=dict) to get your free API key.

{% endnote %}

To access the Yandex.Dictionary API over HTTP, there are XML and [JSON](http://www.json.org/) (JSONP) interfaces available. All the interfaces provide identical functionality and use the same set of input parameters.

The XML interface returns a response in the form of an XML document, while the JSON interface returns JavaScript objects instead of XML elements, but with the same names and semantics; the JSONP interface returns the same JavaScript objects, but by calling a callback function with the specified name.