# Create Watchlist

Creates a new watchlist.

# OpenAPI definition

```json
{
  "info": {
    "title": "Webull OpenAPI Documentation",
    "description": "The Webull OpenAPI enables integration of trading APIs, market data for building trading applications and brokerage solutions. It supports HTTP-based historical and real-time market data and MQTT streaming via WebSocket/TCP, along with SDKs, secure authentication, and APIs for orders, accounts, and event contract trading.",
    "contact": {
      "name": "Webull Developer Support",
      "url": "https://www.webull.hk/en/help",
      "email": "webull-api-support@webull.com"
    },
    "version": "2.0",
    "x-logo": {
      "url": "static/png/logo.png"
    }
  },
  "servers": [
    {
      "url": "https://api.sandbox.webull.hk"
    }
  ],
  "path": "/market-data/watchlists/create",
  "method": "post",
  "tags": [
    "Watchlist"
  ],
  "description": "Creates a new watchlist.",
  "operationId": "createWatchlist",
  "parameters": [
    {
      "name": "x-app-key",
      "in": "header",
      "description": "A unique identifier issued to a developer for accessing an application's API.",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "name": "x-app-secret",
      "in": "header",
      "description": "A unique key issued to developers to access the application's API.",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "name": "x-timestamp",
      "in": "header",
      "description": "Timestamp of the request, follows ISO8601 format: YYYY-MM-DDThh:mm:ssZ, e.g. 2023-07-16T19:23:51Z, only supports UTC time zone.",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "name": "x-signature-version",
      "in": "header",
      "description": "Signature algorithm version, default is 1.0.",
      "required": true,
      "schema": {
        "type": "string",
        "default": "1.0"
      },
      "examples": {
        "1.0": {
          "value": "1.0"
        }
      }
    },
    {
      "name": "x-signature-algorithm",
      "in": "header",
      "description": "Signature algorithm, default is HMAC-SHA1.",
      "required": true,
      "schema": {
        "type": "string",
        "default": "HMAC-SHA1"
      },
      "examples": {
        "HMAC-SHA1": {
          "value": "HMAC-SHA1"
        }
      }
    },
    {
      "name": "x-signature-nonce",
      "in": "header",
      "description": "Signature unique random number.",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "name": "x-access-token",
      "in": "header",
      "description": "An access token is a credential that represents the authorization granted to a client (e.g., a user or an application) to access specific protected resources on behalf of a user, without needing to share their password.",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "name": "x-version",
      "in": "header",
      "description": "API interface version. Supported values: `v2`, `v3`.",
      "required": true,
      "schema": {
        "type": "string",
        "default": "v3"
      },
      "examples": {
        "v3": {
          "value": "v3"
        }
      }
    },
    {
      "name": "x-signature",
      "in": "header",
      "description": "A signature is a unique digital fingerprint, typically encrypted, that verifies the authenticity and integrity of a message or transaction, ensuring it has not been tampered with during transmission.",
      "required": true,
      "schema": {
        "type": "string"
      }
    }
  ],
  "requestBody": {
    "content": {
      "application/json": {
        "schema": {
          "required": [
            "name"
          ],
          "type": "object",
          "properties": {
            "name": {
              "type": "string",
              "description": "Watchlist name",
              "example": "My HK Stocks"
            },
            "sort": {
              "type": "integer",
              "description": "Sort order number (optional)",
              "format": "int32",
              "example": 1
            }
          },
          "description": "Request parameters for creating a watchlist.",
          "title": "WatchlistCreateParam"
        }
      }
    },
    "required": true
  },
  "responses": {
    "200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "watchlist_id": {
                "type": "string",
                "description": "Newly created watchlist unique identifier",
                "example": "12345678"
              }
            },
            "description": "Response for watchlist creation.",
            "title": "WatchlistCreateResponseVo"
          }
        }
      }
    },
    "401": {
      "description": "Unauthorized: Authentication required",
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "error_code": {
                "type": "string",
                "description": "Internal logic error code",
                "example": "UNAUTHORIZED"
              },
              "message": {
                "type": "string",
                "description": "Error message",
                "example": "Insufficient permission"
              }
            }
          }
        }
      }
    },
    "417": {
      "description": "A business logic error triggered when the request cannot be processed due to domain-specific constraints.",
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "error_code": {
                "type": "string",
                "description": "Internal logic error code",
                "example": "INVALID_PARAMETER"
              },
              "message": {
                "type": "string",
                "description": "Error message",
                "example": "Parameter error, phone"
              }
            }
          }
        }
      }
    },
    "500": {
      "description": "Internal Server Error.",
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "error_code": {
                "type": "string",
                "description": "Internal logic error code",
                "example": "SYSTEM_ERROR"
              },
              "message": {
                "type": "string",
                "description": "Error message",
                "example": "Internal Server Error"
              }
            }
          }
        }
      }
    }
  },
  "jsonRequestBodyExample": {
    "name": "My HK Stocks",
    "sort": 1
  },
  "postman": {
    "name": "Create Watchlist",
    "description": {
      "content": "Creates a new watchlist.",
      "type": "text/plain"
    },
    "url": {
      "path": [
        "market-data",
        "watchlists",
        "create"
      ],
      "host": [
        "{{baseUrl}}"
      ],
      "query": [],
      "variable": []
    },
    "header": [
      {
        "disabled": false,
        "description": {
          "content": "(Required) A unique identifier issued to a developer for accessing an application's API.",
          "type": "text/plain"
        },
        "key": "x-app-key",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) A unique key issued to developers to access the application's API.",
          "type": "text/plain"
        },
        "key": "x-app-secret",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) Timestamp of the request, follows ISO8601 format: YYYY-MM-DDThh:mm:ssZ, e.g. 2023-07-16T19:23:51Z, only supports UTC time zone.",
          "type": "text/plain"
        },
        "key": "x-timestamp",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) Signature algorithm version, default is 1.0.",
          "type": "text/plain"
        },
        "key": "x-signature-version",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) Signature algorithm, default is HMAC-SHA1.",
          "type": "text/plain"
        },
        "key": "x-signature-algorithm",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) Signature unique random number.",
          "type": "text/plain"
        },
        "key": "x-signature-nonce",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) An access token is a credential that represents the authorization granted to a client (e.g., a user or an application) to access specific protected resources on behalf of a user, without needing to share their password.",
          "type": "text/plain"
        },
        "key": "x-access-token",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) API interface version. Supported values: `v2`, `v3`.",
          "type": "text/plain"
        },
        "key": "x-version",
        "value": ""
      },
      {
        "disabled": false,
        "description": {
          "content": "(Required) A signature is a unique digital fingerprint, typically encrypted, that verifies the authenticity and integrity of a message or transaction, ensuring it has not been tampered with during transmission.",
          "type": "text/plain"
        },
        "key": "x-signature",
        "value": ""
      },
      {
        "key": "Content-Type",
        "value": "application/json"
      },
      {
        "key": "Accept",
        "value": "application/json"
      }
    ],
    "method": "POST",
    "body": {
      "mode": "raw",
      "raw": "",
      "options": {
        "raw": {
          "language": "json"
        }
      }
    }
  }
}
```