# GET - List

The App Data API enables you to create, update, delete and list data you associated to your application. **App Data** lets you create **tables** of key/value pairs. It is for **application** centric data as opposed to **user** centric data. You can use the data in your targeting queries and/or in a message template.

### Request structure

#### Route

The App Data API exposes a GET endpoint that lets you list App Data **tables**:

`https://api.batch.com/1.0/BATCH_API_KEY/app-data`

Here is a valid cURL example:

```bash
curl -H "Content-Type: application/json" -H "X-Authorization: BATCH_REST_API_KEY" -X GET "https://api.batch.com/1.0/BATCH_API_KEY/app-data"
```

The `BATCH_API_KEY` value is either your **Live**, **Dev** or **SDK** Batch API key from the settings page of your app within the dashboard (⚙ Settings → General).

#### Headers

In order to authenticate with the API, you need to provide your **company REST API Key** as the value of the `X-Authorization` header. You can find it in ⚙ Settings → General.

#### Get parameters

<table><thead><tr><th width="117.5">Id</th><th width="593.5">Description</th></tr></thead><tbody><tr><td><code>from</code></td><td><strong>Integer</strong> - <em>Optional, Default : 0</em><br>Value used for pagination : it indicates the offset of the first table to be returned. Tables are sorted by creation date (from the most recent to the oldest).<br><em>E.g.</em><code>"/app-data?from=10"</code></td></tr><tr><td><code>limit</code></td><td><strong>Integer</strong> - <em>Optional, Default : 10, Max : 100</em><br>Value that indicates the maximum number of tables to be returned per API call.<br><em>E.g.</em><code>"/app-data?limit=20"</code></td></tr></tbody></table>

Here is an example of a valid cURL command which would return 5 tables, starting from the 10th table (sorted by creation date in descending order):

```bash
curl -H "Content-Type: application/json" -H "X-Authorization: BATCH_REST_API_KEY" -X GET
"https://api.batch.com/1.0/BATCH_API_KEY/app-data?from=10&limit=5"
```

### Responses

#### Success

If the GET to the API endpoint is successful you will receive an **HTTP 200** confirmation and information about your audiences.

```json
{
  "app_data": [
    {
      "name": "your_table_name",
      "description": "The table description",
      "nb_rows": 135, // the number of keys
      "size": 40500, // the size in bytes
      "created": "2018-06-29T14:59:03",
      "updated": "2018-12-29T15:07:32"
    },
    {
      "name": "another_table",
      "description": "The table description",
      "nb_rows": 268,
      "size": 80800, // the size in bytes
      "created": "2018-06-29T13:12:09",
      "updated": "2018-06-29T13:42:59"
    }
  ]
}
```

#### Failure

If the POST data does not meet the API requirements you will receive an actionable error message. Contact us at <support@batch.com> if you need further support.

* `AUTHENTICATION_INVALID` (Http status code: 401, Error code: 10)
* `API_MISUSE` (Http status code: 403, Error code: 12)
* `ROUTE_NOT_FOUND` (Http status code: 404, Error code: 20)
* `MISSING_PARAMETER` (Http status code: 400, Error code: 30)
* `MALFORMED_PARAMETER` (Http status code: 400, Error code: 31)
* `MALFORMED_JSON_BODY` (Http status code: 400, Error code: 32)
* `SERVER_ERROR` (Http status code: 500, Error code: 1)
* `MAINTENANCE_ERROR` (Http status code: 503, Error code: 2)


---

# 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://doc.batch.com/developer/api/mep/app-data/list.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.