# Create labels for the user

Creates one or more labels for the authenticated user.
Each label must include:
- name: A string (maximum 256 characters)
- note: A string (maximum 1024 characters)
- address: The label's address
- chainType: The type of the chain (e.g., "evm", "bitcoin", "tron", "solana", "dogecoin", "ton")

Endpoint: POST /user/labels
Version: 1.0.0
Security: ApiKeyAuth

## Request fields (application/json):

  - `name` (string, required)
    Example: "Ethereum Label"

  - `note` (string)
    Example: "Label for Ethereum address"

  - `address` (string, required)
    Example: "0xABCDEF1234567890"

  - `chainType` (string, required)
    Enum: "evm", "bitcoin", "tron", "ton", "solana", "dogecoin"

## Response 200 fields (application/json):

  - `name` (string, required)
    Example: "Bitoin Label"

  - `note` (string)
    Example: "Label for Bitcoin address"

  - `address` (string, required)
    Example: "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa"

  - `chainType` (string, required)
    Enum: "evm", "bitcoin", "tron", "ton", "solana", "dogecoin"

## Response 400 fields (application/json):

  - `error` (string)
    Example: "Bad request"

## Response 401 fields (application/json):

  - `error` (string)
    Example: "API key missing or invalid"