Create Label

POST

/onebox/labels

Create a label on a connected mailbox.

The label is created in the underlying provider account, so it is visible in Gmail or Outlook directly, not only through Onebox.

color is optional and must be a 6-digit hex string including the leading #.

Example

{
  "userId": "K5PF9Y068AMDGENV5BTCNJJZK55F",
  "account": "andrew.lawyer@aurumlawyer.com",
  "labelName": "Priority",
  "color": "#FF5500"
}

Request

Authorization

API Key

Add parameter in header

cmr-x-api-key

Example:

cmr-x-api-key: ********************

Body Params application/jsonRequired

Examples

Responses

🟢201Created

application/json

Label created.

Bodyapplication/json

🟠401Unauthorized

🟠404Not Found

🟠422Validation Error

Request Example

Shell

JavaScript

Java

Swift

curl --location 'https://customers.coldmailreseller.com/api/v1/integration/onebox/labels' \
--header 'cmr-x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "userId": "K5PF9Y068AMDGENV5BTCNJJZK55F",
    "account": "andrew.lawyer@aurumlawyer.com",
    "labelName": "Priority",
    "color": "#FF5500"
}'

Response Example

201 - Example 1

{
    "status": 201,
    "message": "Label created",
    "data": {
        "id": "21b287e4-dbb1-4fec-b8b9-3d4042747a37",
        "labelName": "Priority",
        "color": "#FF5500"
    }
}

Modified at 2026-10-02 12:23:15

List Labels

Rename Label

Create Label

Example#

Request

Responses

Example