> ## Documentation Index > Fetch the complete documentation index at: https://docs.quentli.com/llms.txt > Use this file to discover all available pages before exploring further. # Get customer > Returns a customer by id. ## OpenAPI ````yaml /openapi.yaml get /v1/customers/{id} openapi: 3.0.3 info: title: Quentli REST API version: 1.0.0 description: OpenAPI spec for Quentli REST endpoints. servers: - url: https://api.quentli.com description: Production API - url: https://api.staging.quentli.com description: Staging API for production-like validation - url: https://api.demo.quentli.com description: Demo API hostname served by staging security: - organizationApiKey: [] tags: - name: Auth - name: Billing - name: Catalog - name: Customers - name: Invoices - name: Payment Methods - name: Payment Sessions - name: Payments - name: Subscriptions - name: Tax Invoices - name: Webhooks paths: /v1/customers/{id}: get: tags: - Customers summary: Get customer description: Returns a customer by id. operationId: customers_get_by_id parameters: - schema: type: string description: Identifier of the customer. required: true description: Identifier of the customer. name: id in: path responses: '200': description: Customer details content: application/json: schema: $ref: '#/components/schemas/GetCustomerResponse' '401': description: Authentication required content: application/json: schema: $ref: '#/components/schemas/UserError' '403': description: Permission denied content: application/json: schema: $ref: '#/components/schemas/UserError' '404': description: Customer not found content: application/json: schema: $ref: '#/components/schemas/UserError' components: schemas: GetCustomerResponse: type: object nullable: true properties: id: type: string description: Unique identifier of the customer. example: cus_1234567890abcdefghij createdAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object description: Date and time when the customer was created. example: '2025-01-10T12:00:00.000Z' updatedAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object description: Date and time when the customer was last updated. example: '2025-01-10T12:00:00.000Z' name: type: string description: Name of the customer. example: Juan Pérez username: type: string description: Username used for customer login and customer identification. example: juan_perez_01 email: type: string nullable: true description: Email address of the customer. example: juan@example.com phoneNumber: type: string nullable: true description: >- Primary WhatsApp phone number of the customer, usually in E.164 format. example: '+525512345678' organizationId: type: string description: Identifier of the organization this customer belongs to. example: org_1234567890abcdefghij secondaryPhoneNumber: type: string nullable: true description: Secondary phone number used for reminders and announcements. example: null archivedAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object - nullable: true description: Date and time when the customer was archived. example: null archivedById: type: string nullable: true description: Identifier of the user who archived this customer. example: u_1234567890abcdefghij acceptedServiceAgreement: type: boolean description: Whether the customer has accepted the service agreement. example: true skipTaxInvoice: type: boolean description: Whether tax invoice generation is skipped for this customer. example: false emailVerified: type: boolean description: Whether the customer has verified their email address. example: false phoneNumberVerified: type: boolean description: Whether the customer has verified their phone number. example: true hasChangedPassword: type: boolean description: Whether the customer has set a non-default password. example: true signatureAcceptedAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object - nullable: true description: >- Date and time when recurring charges terms were accepted via signature. example: '2025-01-10T12:00:00.000Z' optedOutWhatsappAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object - nullable: true description: Date and time when the customer opted out of WhatsApp reminders. example: null optedInWhatsappAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object - nullable: true description: Date and time when the customer opted in to WhatsApp reminders. example: '2025-01-05T10:00:00.000Z' startedWhatsappAt: anyOf: - type: string description: Date string - type: string format: date-time description: Date object - nullable: true description: >- Date and time when WhatsApp opt-in flow was started for this customer. example: '2025-01-05T09:55:00.000Z' replyWithAssistant: type: boolean nullable: true description: Whether to reply to this customer using the assistant. example: false metadata: type: array nullable: true items: type: object properties: key: type: string value: type: string required: - key - value additionalProperties: false description: >- Custom metadata entries attached to this customer as key-value pairs. example: - key: studentId value: A-1029 meta: type: object nullable: true additionalProperties: type: string description: Flattened metadata map where each key maps to a string value. example: studentId: A-1029 required: - id - createdAt - updatedAt - name - username - organizationId - acceptedServiceAgreement - skipTaxInvoice - emailVerified - phoneNumberVerified - hasChangedPassword description: Customer details response. Returns null if the customer does not exist. UserError: type: object properties: error: type: object properties: message: type: string required: - message required: - error additionalProperties: false description: Standard user-facing error response envelope. securitySchemes: organizationApiKey: type: http scheme: bearer description: 'Organization API key using `Authorization: Bearer sk_...`.' ````