---
updatedAt: 2026-06-29T20:33:19.000Z
agentTools:
  projectIndex: https://developer.bill.com/llms.txt
---

# Update multiple employees

Update details about multiple employees with one API request.

# OpenAPI definition

```json
{
  "openapi": "3.0.1",
  "info": {
    "title": "BILL v3 API",
    "description": "BILL is a cloud-based financial operations platform for an organization's accounts payable (AP), accounts receivable (AR), and spend & expense (S&E) automation.\n\nThe BILL v3 API gives you access to the same infrastructure that powers the AP, AR, and S&E products. In addition, you can receive real-time event notifications with webhooks.\n\nThe BILL Developer Documentation is available at [developer.bill.com](https://developer.bill.com/docs/home).\n\n## Quickstart\nSign-up and generate a developer key for working with the BILL v3 API. With this key, you can build with the AP, AR, BILL network, and webhook workflows. See [Sandbox API sign up](https://developer.bill.com/docs/api-sandbox-sign-up) for more information.\n\n### Spend & Expense API\nAn API token is required for working with the Spend & Expense API. See [Authentication with Spend & Expense API token](https://developer.bill.com/docs/authentication-with-api-token) for more information.\n\n### BILL v3 API in Postman\nWith this collection, you have access to the BILL v3 API in Postman. When you save your sandbox API credentials as environment variables in Postman, you can simply refer to the variables when you are testing with the BILL v3 API. See [BILL v3 API in Postman](https://developer.bill.com/docs/bill-v3-api-in-postman) for more information.",
    "version": "1"
  },
  "servers": [
    {
      "url": "https://gateway.stage.bill.com/connect",
      "description": "sandbox"
    }
  ],
  "paths": {
    "/v3/classifications/employees/bulk": {
      "patch": {
        "tags": [
          "classifications"
        ],
        "summary": "Update multiple employees",
        "description": "Update details about multiple employees with one API request.",
        "operationId": "bulkUpdateClassificationEmployee",
        "parameters": [
          {
            "name": "sessionId",
            "in": "header",
            "schema": {
              "type": "string",
              "description": "API session ID generated with `/v3/login`",
              "nullable": true,
              "example": "{{session_id}}"
            }
          },
          {
            "name": "devKey",
            "in": "header",
            "schema": {
              "type": "string",
              "description": "Developer key generated with your BILL developer account",
              "nullable": true,
              "example": "{{developer_key}}"
            }
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "maxItems": 50,
                "minItems": 1,
                "type": "array",
                "items": {
                  "$ref": "#/components/schemas/UpdateClassificationEmployeeWithIdRequestDto"
                }
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Update multiple employees response",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ClassificationEmployeeBulkResponseDto"
                }
              }
            }
          },
          "4XX": {
            "description": "List of errors.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "array",
                  "items": {
                    "$ref": "#/components/schemas/BdcError"
                  }
                }
              }
            }
          },
          "5XX": {
            "description": "List of errors.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "array",
                  "items": {
                    "$ref": "#/components/schemas/BdcError"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "BdcError": {
        "required": [
          "category",
          "code",
          "severity",
          "timestamp"
        ],
        "type": "object",
        "properties": {
          "timestamp": {
            "type": "string",
            "format": "date-time"
          },
          "code": {
            "type": "string"
          },
          "severity": {
            "$ref": "#/components/schemas/Severity"
          },
          "category": {
            "$ref": "#/components/schemas/Category"
          },
          "message": {
            "type": "string"
          },
          "params": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Param"
            }
          },
          "detail": {
            "type": "string"
          },
          "help": {
            "type": "string"
          }
        }
      },
      "Category": {
        "type": "string",
        "enum": [
          "REQUEST",
          "APPLICATION",
          "SERVER",
          "DOWNSTREAM"
        ]
      },
      "ClassificationEmployeeBulkResponseDto": {
        "type": "object",
        "properties": {
          "employees": {
            "type": "array",
            "description": "List of employees",
            "items": {
              "$ref": "#/components/schemas/ClassificationEmployeeResponseDto"
            }
          }
        },
        "description": "Response Dto for bulk classification employee."
      },
      "ClassificationEmployeeResponseDto": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "description": "BILL-generated ID of the employee. The value begins with `emp`."
          },
          "firstName": {
            "type": "string",
            "description": "Employee first name"
          },
          "lastName": {
            "type": "string",
            "description": "Employee last name"
          },
          "shortName": {
            "type": "string",
            "description": "Employee short name"
          },
          "parentId": {
            "type": "string",
            "description": "BILL-generated ID of the parent employee. You can set this field if this employee is a child object."
          },
          "archived": {
            "type": "boolean",
            "description": "Set as `true` if the employee is archived"
          },
          "createdTime": {
            "type": "string",
            "description": "Created date and time",
            "format": "date-time"
          },
          "updatedTime": {
            "type": "string",
            "description": "Updated date and time",
            "format": "date-time"
          }
        },
        "description": "ClassificationEmployee response Dto."
      },
      "Param": {
        "required": [
          "name",
          "value"
        ],
        "type": "object",
        "properties": {
          "additional": {
            "type": "object",
            "additionalProperties": {
              "type": "string"
            }
          },
          "name": {
            "minLength": 1,
            "type": "string"
          },
          "value": {
            "minLength": 1,
            "type": "string"
          }
        }
      },
      "Severity": {
        "type": "string",
        "enum": [
          "ERROR",
          "WARNING",
          "INFORMATION"
        ]
      },
      "UpdateClassificationEmployeeWithIdRequestDto": {
        "required": [
          "id"
        ],
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "description": "BILL-generated ID of the employee. The value begins with `emp`."
          },
          "firstName": {
            "type": "string",
            "description": "Employee first name"
          },
          "lastName": {
            "type": "string",
            "description": "Employee last name"
          },
          "shortName": {
            "type": "string",
            "description": "Employee short name"
          },
          "parentId": {
            "type": "string",
            "description": "BILL-generated ID of the parent employee. You can set this field if this employee is a child object."
          }
        },
        "description": "Update ClassificationEmployee with id request Dto."
      }
    }
  }
}
```