> For the complete documentation index, see [llms.txt](https://docs.datasaur.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datasaur.ai/api/labeling/add-label-item-into-projects-label-set.md).

# Add Label Set Item into Project's Label Set

In addition to adding label set items through the [Label Set Extension](/advanced/extensions/labels.md), you can also add new items to an existing label set using the API.\
\
**Mutation**: [AppendLabelSetTagItems](https://api-docs.datasaur.ai/#mutation-appendLabelSetTagItems)

## cURL

Use the following cURL command to add one or more label set items to an existing project. Copy and paste it, then replace the following:

* **`access_token`** with your own API access token.
* **`label-set-id`** with the ID of the label set (see [Get List of Label Sets in a Project](/api/labeling/get-list-of-label-sets-in-a-project.md)).

```javascript
curl --location --request POST '<https://datasaur.ai/graphql>' \\
--header 'Authorization: Bearer access_token' \\
--header 'Content-Type: application/json' \\
--data-raw '{ "query": "mutation AppendLabelSetTagItems($input: AppendLabelSetTagItemsInput!) { appendLabelSetTagItems(input: $input) { id color parentId tagName } }", "operationName": "AppendLabelSetTagItems", "variables": { "input": { "labelSetId": "project-label-set-id", "tagItems": [ { "tagName": "LOC", "color": null }, { "tagName": "GPE", "color": null } ] } } }'

```

Here’s the same request in a more readable format:

```javascript
{
    "operationName": "AppendLabelSetTagItems",
    "query": "mutation AppendLabelSetTagItems($input: AppendLabelSetTagItemsInput!) { appendLabelSetTagItems(input: $input) { id color parentId tagName } }",
    "variables": {
        "input": {
            "labelSetId": "label-set-id",
            "tagItems": [
                {
                    "tagName": "LOC",
                    "color": null
                },
                {
                    "tagName": "GPE",
                    "color": null
                }
            ]
        }
    }
}
```

* **operationName**: you can fill any alphanumeric string in as the operationName. Refer to [this page](https://graphql.org/learn/queries/#operation-name) for best practices on choosing an `operationName` .
* **variables:**
  * **input:**
    * **labelSetId:** string, id of the target label set in a project. Refer to [this page](/api/labeling/get-list-of-label-sets-in-a-project.md) to obtain label set ID.
    * **tagItems:**
      * **tagName:** name of the label item
      * **color:** valid HTML readable color code
* **query**: Copy this from the example above.

{% hint style="info" %}
A **tag** has the same meaning as **label**. In the near future, we will update the GraphQL Schema to refer to all instances as labels.
{% endhint %}

## Response

Here is the response you can expect after issuing the cURL command. Use the **id** to create the project.

```javascript
{
    "data": {
        "textDocument": {
            "id": "c541e403-776a-b740-4baf-955c7be86c0d"
        }
    },
    "extensions": {}
}
```


---

# Agent Instructions
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## Querying This Documentation
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Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.datasaur.ai/api/labeling/add-label-item-into-projects-label-set.md?ask=<question>&goal=<endgoal>
```

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