> ## Documentation Index > Fetch the complete documentation index at: https://docs.roark.ai/llms.txt > Use this file to discover all available pages before exploring further. # Create a customer field > Adds a field of your project's own. With extract on, conversations fill it from what customers say, guided by its description. ## OpenAPI ````yaml /api-reference/openapi.documented.json post /v1/customer/fields openapi: 3.1.0 info: title: Roark Analytics API description: >- The Roark Analytics API gives you access to the same API that powers the award winning Roark Analytics platform. version: 1.0.0 servers: - description: Production url: https://api.roark.ai security: - Bearer: [] tags: - name: Agent - name: Customer - name: Agent Endpoint - name: Tool - name: Phone Number - name: Call - name: Chat - name: Metric - name: Metric Policy - name: Metric Collection Job - name: Customer Flow - name: Customer Flow Edge Case - name: Simulation - name: Simulation Persona - name: Simulation Environment - name: Simulation Scenario - name: Simulation Run Plan - name: Simulation Template - name: Simulation Audio Clip - name: Simulation Run Plan Job - name: Simulation Job - name: HTTP Request Definition - name: Webhook - name: Issue - name: Autoimprove - name: Agent Config - name: Knowledge Base - name: Calendar Connection - name: Config - name: Organization Project - name: Organization Project Member - name: Organization Project API Key - name: Organization Config - name: CLI Auth - name: Me - name: Project - name: Usage - name: Analytics - name: Dashboard - name: Live Report - name: Benchmark - name: Health - name: Prospect Simulation - name: Campaign Credit paths: /v1/customer/fields: post: tags: - Customer summary: Create a customer field description: >- Adds a field of your project's own. With extract on, conversations fill it from what customers say, guided by its description. operationId: postV1CustomerFields requestBody: content: application/json: schema: type: object properties: key: type: string pattern: ^[A-Za-z][A-Za-z0-9_]{0,99}$ description: >- Starts with a letter; letters, numbers and underscores only. Fixed once created. example: plan_tier label: type: string minLength: 1 maxLength: 100 description: type: - string - 'null' minLength: 1 maxLength: 500 description: >- What the agent listens for in a conversation. Required when extract is true. valueType: type: string enum: - TEXT - NUMBER - BOOLEAN - DATE - PHONE_NUMBER - EMAIL - CURRENCY extract: type: boolean description: Whether conversations fill this field required: - key - label - valueType - extract responses: '201': description: Created field content: application/json: schema: type: object properties: data: type: object properties: key: type: string description: >- What filters, sorts and attribute routes name the field by label: type: string description: type: - string - 'null' description: What extraction looks for in a conversation valueType: type: string enum: - TEXT - NUMBER - BOOLEAN - DATE - PHONE_NUMBER - EMAIL - CURRENCY source: type: string enum: - SYSTEM - CUSTOM description: >- SYSTEM for a built-in field, CUSTOM for one your project defined extract: type: boolean description: >- Whether conversations fill this field on this project: the project's own setting where it made one redactedBy: type: - string - 'null' enum: - redactName - redactEmail - redactPhone - redactDateOfBirth - redactAddress - redactBankAccountNumber description: >- The project redaction setting that, when on, keeps conversations from filling this field required: - key - label - description - valueType - source - extract - redactedBy required: - data '400': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Validation error example: type: validation code: invalid_parameter message: The request was invalid param: email description: Bad Request '401': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Authentication error example: type: authentication code: unauthorized message: Authentication required description: Unauthorized '404': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Not found error example: type: not_found code: resource_not_found message: The requested resource could not be found description: Not Found '409': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Conflict error example: type: conflict code: resource_in_use message: The resource is in use and cannot be deleted description: Conflict '500': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Server error example: type: internal code: internal_error message: Internal server error description: Internal Server Error x-codeSamples: - lang: JavaScript source: |- import Roark from '@roarkanalytics/sdk'; const client = new Roark({ bearerToken: process.env['ROARK_API_BEARER_TOKEN'], // This is the default and can be omitted }); const response = await client.customer.createField({ extract: true, key: 'plan_tier', label: 'x', valueType: 'TEXT', }); console.log(response.data); - lang: Python source: |- import os from roark_analytics import Roark client = Roark( bearer_token=os.environ.get("ROARK_API_BEARER_TOKEN"), # This is the default and can be omitted ) response = client.customer.create_field( extract=True, key="plan_tier", label="x", value_type="TEXT", ) print(response.data) components: schemas: ErrorResponse: type: object properties: type: type: string enum: - validation - authentication - forbidden - not_found - conflict - payment_required - rate_limit - internal description: The error type category examples: - validation - authentication code: type: string description: Machine-readable error code identifier examples: - invalid_parameter - missing_required_field - unauthorized message: type: string description: Human-readable error message examples: - The request was invalid - Authentication required param: type: string description: The parameter that caused the error (if applicable) examples: - email - user_id details: description: Additional error context information required: - type - code - message securitySchemes: Bearer: type: http scheme: bearer bearerFormat: JWT ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.