> For the complete documentation index, see [llms.txt](https://docs.echo3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.echo3d.com/javascript/using-the-sdk.md).

# Using the SDK

The SDK implements our [API](/api/objects.md) and [Objects](/api/objects.md) and includes some useful functions to access data stored on our platform.

## Constructor

This function expects the [API Key](/quickstart/get-api-key.md) and [Security Key](/web-console/manage-pages/collections-and-sharing/security.md#secret-key) as input to initialize the SDK.

## queryAll

Get all entries associated with an API key. Returns a JSON of all entries.

You can set optional success and error callback functions as input.

## queryEntry

Get a specific entry associated with an API key.  Returns a JSON of a specific entry.

This function expects an Entry ID as an input.

You can set optional success and error callback functions as input.

## queryEntries

Get specific entries associated with an API key. Returns a JSON of specific entries.

This function expects an array of Entry IDs as an input.

You can set optional success and error callback functions as input.

## queryTags

Get all entries associated with an API key and specific tags. Returns a JSON of matching entries.

This function expects an array of tags (strings) as an input.

You can set optional success and error callback functions as input.

## queryFilename

Get entries associated with an API key that matches a given filename.  Returns a JSON of all matching entries.

This function expects a filename as input.

You can set optional success and error callback functions as input.

## queryData

Get entries associated with an API key that matches a given metadata key and value.  Returns a JSON of all matching entries.

This function expects a key and a value as input.

You can set optional success and error callback functions as input.

## queryType

Get entries associated with an API key that matches a given asset type.  Returns a JSON of all matching entries.

This function expects a type as input. Options are `MODEL_HOLOGRAM`, `VIDEO_HOLOGRAM`, `IMAGE_HOLOGRAM`, `BRICK_TARGET`, `GEOLOCATION_TARGET`, or `IMAGE_TARGET`.

You can set optional success and error callback functions as input.

## queryLocation

Get all entries associated with an API key around a specific location. Returns a JSON of matching entries.

This function expects a location Location expressed as `<"lat", "long">` and a radius (default is `1`) as an input.

You can set optional success and error callback functions as input.

## queryGlobalData

Get the value of a global database entry associated with an API key and a key. Returns a string.

This function expects a key as input.

You can set optional success and error callback functions as input.

## postGlobalData

Set the value of a global database entry associated with an API key and a key. Returns a status message.

This function expects a key and value as input.

You can set optional success and error callback functions as input.

## queryEntryData

Get the metadata value of a specific entry associated with an API key and a key. Returns a string.

This function expects an Entry ID and a key as input.

You can set optional success and error callback functions as input.

## postEntryData

Set the metadata key and value of a specific entry associated with an API key. Returns a status message.

This function expects an Entry ID, key, and value as input.

You can set optional success and error callback functions as input.

## downloadFileByFileStorageID

Downloads a file based on a given file Storage ID. Returns the file contents if the query is valid. Otherwise, return a text message.

This function expects a Storage ID as input.

You can set optional success and error callback functions as input.

## downloadFileByEntryID

Downloads a file based on a given Entry ID. Returns the originally uploaded file contents if the query is valid. Otherwise, return a text message.

This function expects an Entry ID as input.

You can set optional success and error callback functions as input.

## downloadFileByEntryIDAndFormat

Downloads a file in a specific format based on a given Entry ID. Returns the file contents if the query is valid. Otherwise, return a text message.

This function expects an Entry ID and format as input. Valid formats are `FBX`, `OBJ`, `GLTF`, `GLB`, or `USDZ`.

You can set optional success and error callback functions as input.