# Link multiple data sources

**POST /groups/{groupId}/apps/{appId}/multi_data_sources**

Call this endpoint to link multiple data sources to an App. The total 
limit of linked data sources per App is 100. Data Sources linked by this
endpoint will have `ReadAndWrite` default rules. 


## Servers
- The root API resource and starting point for the App Services API.: https://services.cloud.mongodb.com/api/admin/v3.0 (The root API resource and starting point for the App Services API.)


## Authentication methods
- Token auth


## Parameters

### Path parameters
- **groupId** (string)
  An Atlas [Project/Group
  ID](https://docs.atlas.mongodb.com/tutorial/manage-projects/).
- **appId** (string)
  The ObjectID of your application.
  [The App Services API Project and Application IDs section](#section/Project-and-Application-IDs) demonstrates how to find this
  value.


### Body: application/json (array[object])

- **name** (string)
  Create a name to identify each cluster you want to link.
- **type** (string)
  The type of the data source you want to link. 
- **config** (object)



## Responses
### 201
No content

### 400
- Data Sources exceeds the limit of 25 in the payload
- Data Sources exceed the limit of 100 on the App
- Multiple Default Rules for a single Data Source 
- Type of Data Source is neither "mongodb-atlas" nor "datalake"
- Linking failed for at least one Data Source

#### Body: application/json (object)
- **failedClusterNames** (array[string])
  The names of any data sources that failed to link. This uses the `name` property
  you assigned to the data source. 


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