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

# YiDA Open API

> The main use cases of the open API include periodically pulling data back into self-built systems for refined processing or archiving, as well as integrating the entry points for form submission and workflow initiation into existing platforms. YiDA has published its Open API on the DingTalk Open Platform, where users can call the API to achieve the above functions.

| **Feature** | **Free plan** | **Basic edition** | **Professional edition** | **Dedicated edition** |
| ----------- | ------------- | ----------------- | ------------------------ | --------------------- |
| Open API    | Not supported | Not supported     | Supported                | Supported             |

## 1. Introduction

Open APIs are mainly used in the following scenarios:

1. Periodically pull data back into in-house systems for refinement or archival.
2. Integrate form submission and workflow initiation entry points into existing platforms.

If your use case matches any of the above, consider using YiDA's Open API capabilities.

Currently, YiDA has published all Open APIs on the DingTalk Open Platform, while still retaining the YiDA Open API (legacy). Calling YiDA Open APIs through the DingTalk Open Platform is the recommended approach.

**DingTalk Open Platform Server API v2 Overview**

## 2. YiDA Open API on the DingTalk Open Platform

**YiDA Open API Overview on the DingTalk Open Platform**