# Get information about the underlying Atlas mongod

**GET /groups/{groupId}/apps/{appId}/services/{serviceId}/commands/build_info**




## 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.
- **serviceId** (string)
  The unique `_id` value of a service.



## Responses
### 200
The build information was successfully retrieved.

#### Body: application/json (object)
- **version** (string)
  Human-readable version information about the mongod instance. This
  string will take the format `<major>.<minor>.<patch>`.
- **gitVersion** (string)
  The commit identifier that identifies the state of the code use to build
  the mongod.
- **versionArray** (array[integer])
  An array that conveys version information about the mongod instance. See
  version for a more readable version of this string.
- **javascriptEngine** (string)
  A string that reports the JavaScript engine used in the mongod instance.
  By default, this is `mozjs` after version `3.2`, and previously `V8`.
- **bits** (string)
  A number that reflects the target processor architecture of the mongod
  binary.
- **debug** (boolean)
  A boolean that reflects whether or not the `mongod` instance was built
  with debugging options.
- **maxBsonObjectSize** (integer)
  A number that reports the [Maximum BSON Document
  Size](https://www.mongodb.com/zh-cn/docs/manual/reference/limits#std-label-limit-bson-document-size)


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