> ## Documentation Index > Fetch the complete documentation index at: https://docsv4.mile.app/llms.txt > Use this file to discover all available pages before exploring further. # Create data types in bulk > Create up to 1000 data types in one request. Each item is validated and created on its own, so one invalid item does not stop the rest; the response lists the result of every item plus `success` and `failed` counts, and `failed_index` holds the `rec_index` of the items that failed. Permission: `view/dataType`. Available on `/api/v3` and `/api/v4`. On `/api/v4` the data types are created as v4 data types, which also accept the field types `title`, `boolean`, `multiOption` and `relation`, plus field `unique`, `validations` and `relation` settings. ## OpenAPI ````yaml /openapi/public/openapi-data.json post /data-type/bulk openapi: 3.0.0 info: title: API - Data version: 3.0.0 description: API Documentation - RESTful API for field operations management. servers: - url: https://apiweb.mile.app/api/v3 security: - bearerAuth: [] tags: - name: Data Source description: >- The Data source could help you simplify the process of filling in task information based on existing data in the app. This data could consist of information such as name, number, date, coordinate, and multiple options. The Data typically represents entities such as customers, products, employees, suppliers, or any other critical data elements that are used across the application. **To see the details of data source object, please follow [this link](#tag/data_source_model)** - name: Data Type description: >- The Data type is the structure of data fields that is customizable to suit your business needs. Data type attributes consist of IDs, name, field details, type, and primary key. This data type structure will be used at Data Source and Flow. **To see the details of data type object, please follow [this link](#tag/data_type_model)** paths: /data-type/bulk: post: tags: - Data Type summary: Create data types in bulk description: >- Create up to 1000 data types in one request. Each item is validated and created on its own, so one invalid item does not stop the rest; the response lists the result of every item plus `success` and `failed` counts, and `failed_index` holds the `rec_index` of the items that failed. Permission: `view/dataType`. Available on `/api/v3` and `/api/v4`. On `/api/v4` the data types are created as v4 data types, which also accept the field types `title`, `boolean`, `multiOption` and `relation`, plus field `unique`, `validations` and `relation` settings. operationId: createDataTypeBulk requestBody: content: application/json: schema: $ref: '#/components/schemas/postDataTypeBulkRequest' required: true responses: '201': description: Success content: application/json: schema: type: object properties: success: type: integer description: Number of data types created. failed: type: integer description: Number of items that failed. data_types: type: array items: type: object additionalProperties: true description: Result per item, in request order. failed_index: type: array items: type: integer description: '`rec_index` of failed items, when sent.' example: success: 1 failed: 1 data_types: - status: true message: Success rec_index: 0 _id: 6710a3c2e4b0a1f2c3d4e5f6 name: OutletDetail - status: false message: The name has already been taken. rec_index: 1 name: OutletDetail failed_index: - 1 '400': description: Bad Request content: application/json: schema: type: object properties: status: type: boolean description: Shows if the request was successful. message: type: string description: A short message explaining what went wrong. example: status: false message: Bad request - invalid parameters provided. '500': description: Server error content: application/json: schema: type: object properties: status: type: boolean description: Shows if the request was successful. message: type: string description: A short message explaining what went wrong. example: status: false message: Internal server error, please contact support@mile.app. deprecated: false security: - bearerAuth: [] components: schemas: postDataTypeBulkRequest: type: object required: - data_types properties: data_types: type: array maxItems: 1000 description: >- Data types to create, maximum 1000 per request. Each item uses the same body as **Create data type**: `name` (required, unique in the organization), `fields` (required), `limitUser`, `commonData`. Each field needs `id` (letters, digits, `-` and `_` only), `title`, `type` and `required`; `optionData` is required for `option` fields. Optional `rec_index` is echoed back so you can match results to your input. items: type: object required: - name - fields properties: name: type: string fields: type: array items: type: object additionalProperties: true limitUser: type: boolean commonData: type: boolean rec_index: type: integer example: data_types: - rec_index: 0 name: OutletDetail commonData: true limitUser: false fields: - id: dataId title: Data ID type: string required: true - id: outletName title: Outlet Name type: string required: true - id: outletType title: Outlet Type type: string optionData: - minimarket - supermarket required: false - rec_index: 1 name: OutletDetail fields: - id: dataId title: Data ID type: string required: true securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: Use a valid Bearer token to authenticate. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.