# List Event Contract Series

Retrieves multiple series with specified filters. A series represents a template for recurring events that follow the same format and rules (e.g., “Monthly Jobs Report” ). This endpoint allows you to browse and discover available series templates by category.

# OpenAPI definition

```json
{
  "info": {
    "title": "Webull Open API Reference",
    "description": "application.yml\\ncom\\ni18n\\nMETA-INF\\nstatic\\n\\r\\n",
    "contact": {
      "name": "",
      "url": "",
      "email": ""
    },
    "version": "2.0",
    "x-logo": {
      "url": "static/png/logo.png"
    }
  },
  "servers": [
    {
      "url": "https://broker-api.sandbox.webull.com"
    }
  ],
  "path": "/broker/instruments/event-contracts/series/list",
  "method": "get",
  "tags": [
    "Instruments"
  ],
  "description": "Retrieves multiple series with specified filters. A series represents a template for recurring events that follow the same format and rules (e.g., “Monthly Jobs Report” ). This endpoint allows you to browse and discover available series templates by category.",
  "operationId": "brokerEventSeriesList",
  "parameters": [
    {
      "name": "category",
      "in": "query",
      "description": "The category which this series belongs to.",
      "required": true,
      "schema": {
        "type": "string",
        "enum": [
          "ECONOMICS",
          "FINANCIALS",
          "POLITICS",
          "ENTERTAINMENT",
          "SCIENCE_TECHNOLOGY",
          "CLIMATE_WEATHER",
          "TRANSPORTATION",
          "CRYPTO",
          "SPORTS"
        ]
      },
      "example": "ECONOMICS"
    },
    {
      "name": "symbols",
      "in": "query",
      "description": "List of series symbols, maximum 100 symbols per query.",
      "required": false,
      "schema": {
        "type": "string"
      },
      "example": "KXRATECUTCOUNT,KXFEDDECISION"
    },
    {
      "name": "pagination_key",
      "in": "query",
      "description": "Pagination key from previous response for next page",
      "required": false,
      "schema": {
        "type": "string"
      },
      "example": "eyJ2IjoxLCJsYXN0SWQiOiIxNTE3NTAiLCJwYWdlSW===="
    },
    {
      "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-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"
      }
    }
  ],
  "responses": {
    "200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "data": {
                "type": "array",
                "description": "Result data list",
                "items": {
                  "required": [
                    "frequency"
                  ],
                  "type": "object",
                  "properties": {
                    "symbol": {
                      "type": "string",
                      "description": "Series Symbol",
                      "example": "KXNCAAF"
                    },
                    "name": {
                      "type": "string",
                      "description": "Series Name",
                      "example": "CFP National Champion"
                    },
                    "category": {
                      "type": "string",
                      "description": "Category Code",
                      "example": "SPORTS"
                    },
                    "frequency": {
                      "type": "string",
                      "description": "frequency, e.g., HOURLY,DAILY,WEEKLY,MONTHLY,ANNUAL,ONE_OFF,CUSTOM.",
                      "example": "ANNUAL"
                    },
                    "series_id": {
                      "type": "integer",
                      "description": "Series ID",
                      "format": "int32",
                      "example": 152917
                    }
                  },
                  "description": "Event series information",
                  "title": "EventSeriesVo"
                }
              },
              "pagination_key": {
                "type": "string",
                "description": "Pagination key for next page. If absent, indicates this is the last page.",
                "example": "eyJ2IjoxLCJsYXN0SWQiOiI5MTMyNDQ3NjkiLCJwYWdlSW===="
              }
            },
            "description": "Paginated result with cursor-based pagination",
            "title": "PaginatedResultVoEventSeriesVo"
          }
        }
      }
    },
    "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"
              }
            }
          }
        }
      }
    }
  },
  "postman": {
    "name": "List Event Contract Series",
    "description": {
      "content": "Retrieves multiple series with specified filters. A series represents a template for recurring events that follow the same format and rules (e.g., “Monthly Jobs Report” ). This endpoint allows you to browse and discover available series templates by category.",
      "type": "text/plain"
    },
    "url": {
      "path": [
        "broker",
        "instruments",
        "event-contracts",
        "series",
        "list"
      ],
      "host": [
        "{{baseUrl}}"
      ],
      "query": [
        {
          "disabled": false,
          "description": {
            "content": "(Required) The category which this series belongs to.",
            "type": "text/plain"
          },
          "key": "category",
          "value": ""
        },
        {
          "disabled": false,
          "description": {
            "content": "List of series symbols, maximum 100 symbols per query.",
            "type": "text/plain"
          },
          "key": "symbols",
          "value": ""
        },
        {
          "disabled": false,
          "description": {
            "content": "Pagination key from previous response for next page",
            "type": "text/plain"
          },
          "key": "pagination_key",
          "value": ""
        }
      ],
      "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) 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": "Accept",
        "value": "application/json"
      }
    ],
    "method": "GET"
  }
}
```