# Introduction

The purpose of **SIGNIUS PROFESSIONIAL** platform is eIDAS-compliant electronic signing, where eIDAS stands for "electronic IDentification, Authentication and trust Services", and it is the EU regulation on digital services.

<div align="left"><figure><img src="/files/ccuDRRBWMyIrJCezpdc4" alt=""><figcaption></figcaption></figure></div>

Our **SIGNIUS API** is primarily used to delegate a document for electronic signing.

**SIGNIUS API User guide** will easily introduce you with the functionalities of **SIGNIUS PROFESIONAL** platfor&#x6D;**.**

It was written in a comprehensible manner to describe all actions related to document and signees management.

Our Application Programming Interface is a REST-type API. It has predictable resource-oriented URLs, accepts [JSON-encoded](https://www.json.org/json-en.html) request bodies, returns JSON-encoded responses and uses standard HTTP response codes and verbs.

**SIGNIUS API** is rapidly evolving, but we always provide backwards compatibility.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

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

```
GET https://docs.signius.eu/api/introduction.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

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.