> ## Documentation Index > Fetch the complete documentation index at: https://docs.eat-now.io/llms.txt > Use this file to discover all available pages before exploring further. # List customer custom fields > Returns the custom fields the restaurant defined for its customers, with their type and allowed options. Use the field `id` as the key of `custom_fields` when reading or writing a customer. Requires `CUSTOMERS_READ`. ## OpenAPI ````yaml https://app.eat-now.io/api/partner/v1/openapi.json get /api/partner/v1/customer-fields openapi: 3.0.3 info: title: EatNow Partner API version: v1 description: >- Version 1 of the EatNow partner API. This API is designed for trusted partner integrations that need restaurant-scoped access to availability, reservation management, and operational reference data. Authentication - Use `Authorization: Bearer ` with a partner API token created from the EatNow dashboard. - Access is controlled by credential scopes and each request is resolved to a single restaurant. Base URL - The server URL in this document is the canonical base URL for the current environment. Errors - Endpoint errors use `error.code`, `error.message`, and `error.request_id`. Errors raised before the endpoint, including rate limiting, may use another format. - Validation, authentication, authorization, conflicts, and not-found cases all use the same top-level error shape. Rate limits - The partner route rule allows 600 requests per minute per client IP. Back off on 429. When present, x-ratelimit-reset is an epoch timestamp in milliseconds. Public endpoints - `GET /api/partner/v1` and `GET /api/partner/v1/openapi.json` are public. - All business endpoints require Bearer authentication. servers: - url: https://app.eat-now.io security: [] tags: - name: Meta description: Platform metadata and schema endpoints - name: Authentication description: Credential validation and auth context endpoints - name: Availability description: Bookable slot search and exact slot validation - name: Catalog description: Reference data for restaurant tables, rooms, prescribers, and discounts - name: Reservations description: Reservation lookup, search, update, and cancellation - name: Customers description: >- Customer (CRM) records, independent of reservations: list, sync, create, update - name: Webhooks description: Webhook endpoints a key subscribes to V1 events (reservations, customers) - name: Missed Calls description: Report missed calls and trigger WhatsApp follow-up templates externalDocs: description: Integration guides, authentication, errors, and webhook reference url: https://docs.eat-now.io/api-reference/introduction paths: /api/partner/v1/customer-fields: get: tags: - Customers summary: List customer custom fields description: >- Returns the custom fields the restaurant defined for its customers, with their type and allowed options. Use the field `id` as the key of `custom_fields` when reading or writing a customer. Requires `CUSTOMERS_READ`. operationId: listPartnerCustomerFields responses: '200': description: Customer custom fields, in dashboard order content: application/json: schema: $ref: '#/components/schemas/PartnerApiCustomerFieldListResponse' '400': description: Request validation failed (see `error.details.issues`). content: application/json: schema: $ref: '#/components/schemas/PartnerApiError' '401': description: Authentication failed content: application/json: schema: $ref: '#/components/schemas/PartnerApiError' '403': description: 'Scope is insufficient. Required: `CUSTOMERS_READ`.' content: application/json: schema: $ref: '#/components/schemas/PartnerApiError' '429': description: >- Rate limit exceeded. Configured limit: 600 requests per minute per client IP for the partner route rule. This middleware response may not use the PartnerApiError envelope or include request_id. Back off before retrying. '500': description: >- Unexpected server error. Preserve error.request_id for support. Before retrying a write, check whether it already succeeded. content: application/json: schema: $ref: '#/components/schemas/PartnerApiError' security: - PartnerBearerToken: [] components: schemas: PartnerApiCustomerFieldListResponse: type: object properties: data: type: array items: $ref: '#/components/schemas/PartnerApiCustomerField' required: - data PartnerApiError: type: object properties: error: type: object properties: code: $ref: '#/components/schemas/PartnerApiErrorCode' message: type: string request_id: type: string details: type: object additionalProperties: nullable: true required: - code - message - request_id required: - error PartnerApiCustomerField: type: object properties: id: type: string name: type: string name_i18n: type: object properties: FR: type: string EN: type: string ES: type: string IT: type: string DE: type: string PT: type: string type: type: string enum: - TEXT - NUMBER - DATE - BOOLEAN - SELECT - MULTI_SELECT required: type: boolean description: Required in the EatNow dashboard form. Not enforced on API writes. is_active: type: boolean description: >- Inactive fields are hidden from the dashboard. Their values stay on the customers and can still be written. min: type: number nullable: true description: Lowest value a NUMBER field accepts, if bounded. max: type: number nullable: true description: Highest value a NUMBER field accepts, if bounded. max_items: type: integer nullable: true description: Most values a MULTI_SELECT field accepts, if bounded. options: type: array nullable: true items: type: object properties: value: type: string label: type: string required: - value - label description: Allowed values of a SELECT or MULTI_SELECT field. required: - id - name - name_i18n - type - required - is_active - min - max - max_items - options PartnerApiErrorCode: type: string enum: - AUTHENTICATION_REQUIRED - INVALID_AUTHENTICATION - INSUFFICIENT_SCOPE - RESTAURANT_SUSPENDED - VALIDATION_ERROR - RESOURCE_NOT_FOUND - RESOURCE_CONFLICT - RATE_LIMITED - INTERNAL_ERROR securitySchemes: PartnerBearerToken: type: http scheme: bearer bearerFormat: API Token description: >- Restaurant-scoped partner API token passed as `Authorization: Bearer `. x-default: your_token_here ````