lexoffice

lexoffice Contacts API

Customers and vendors.

Documentation GitHub OpenAPI

Operations 4

GET /contacts Filter and list contacts #

POST /contacts Create a contact #

GET /contacts/{id} Retrieve a contact #

PUT /contacts/{id} Update a contact #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: lexoffice (lexware Office) Public Contacts API
  description: Public REST API for lexoffice, the German cloud accounting and invoicing SaaS from Lexware (Haufe Group), rebranded to "lexware Office" in 2025.
  version: '1.0'
  contact:
    name: lexware Office Developers
    url: https://developers.lexware.io/docs/
  license:
    name: Proprietary
    url: https://www.lexware.de/
servers:
- url: https://api.lexware.io/v1
  description: Lexware API gateway (current)
- url: https://api.lexoffice.io/v1
  description: Legacy lexoffice API gateway (retired end of 2025)
security:
- bearerAuth: []
tags:
- name: Contacts
  description: Customers and vendors.
paths:
  /contacts:
    get:
      operationId: listContacts
      tags:
      - Contacts
      summary: Filter and list contacts
      description: Returns a paged list of contacts. Supports filter query parameters such as email, name, number, customer, and vendor.
      parameters:
      - name: email
        in: query
        required: false
        schema:
          type: string
      - name: name
        in: query
        required: false
        schema:
          type: string
      - name: number
        in: query
        required: false
        schema:
          type: integer
      - name: customer
        in: query
        required: false
        schema:
          type: boolean
      - name: vendor
        in: query
        required: false
        schema:
          type: boolean
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/Size'
      responses:
        '200':
          description: A page of contacts.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ContactPage'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
    post:
      operationId: createContact
      tags:
      - Contacts
      summary: Create a contact
      description: Creates a new contact (customer and/or vendor).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Contact'
      responses:
        '200':
          description: Reference to the created contact.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResourceReference'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /contacts/{id}:
    parameters:
    - $ref: '#/components/parameters/Id'
    get:
      operationId: getContact
      tags:
      - Contacts
      summary: Retrieve a contact
      description: Retrieves a single contact by its UUID.
      responses:
        '200':
          description: The requested contact.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Contact'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateContact
      tags:
      - Contacts
      summary: Update a contact
      description: Updates an existing contact. The current version number must be supplied for optimistic locking.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Contact'
      responses:
        '200':
          description: Reference to the updated contact.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResourceReference'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    Error:
      type: object
      properties:
        timestamp:
          type: string
          format: date-time
        status:
          type: integer
        error:
          type: string
        path:
          type: string
        message:
          type: string
        details:
          type: array
          items:
            type: object
            properties:
              violation:
                type: string
              field:
                type: string
              message:
                type: string
    Address:
      type: object
      properties:
        supplement:
          type: string
        street:
          type: string
        zip:
          type: string
        city:
          type: string
        countryCode:
          type: string
          example: DE
    ResourceReference:
      type: object
      properties:
        id:
          type: string
          format: uuid
        resourceUri:
          type: string
          format: uri
        createdDate:
          type: string
          format: date-time
        updatedDate:
          type: string
          format: date-time
        version:
          type: integer
    Contact:
      type: object
      properties:
        id:
          type: string
          format: uuid
          readOnly: true
        organizationId:
          type: string
          format: uuid
        version:
          type: integer
        roles:
          type: object
          properties:
            customer:
              type: object
              properties:
                number:
                  type: integer
            vendor:
              type: object
              properties:
                number:
                  type: integer
        company:
          type: object
          properties:
            name:
              type: string
            taxNumber:
              type: string
            vatRegistrationId:
              type: string
            allowTaxFreeInvoices:
              type: boolean
            contactPersons:
              type: array
              items:
                type: object
                properties:
                  salutation:
                    type: string
                  firstName:
                    type: string
                  lastName:
                    type: string
                  emailAddress:
                    type: string
                  phoneNumber:
                    type: string
        person:
          type: object
          properties:
            salutation:
              type: string
            firstName:
              type: string
            lastName:
              type: string
        addresses:
          type: object
          properties:
            billing:
              type: array
              items:
                $ref: '#/components/schemas/Address'
            shipping:
              type: array
              items:
                $ref: '#/components/schemas/Address'
        emailAddresses:
          type: object
          additionalProperties: true
        phoneNumbers:
          type: object
          additionalProperties: true
        note:
          type: string
        archived:
          type: boolean
          readOnly: true
    ContactPage:
      type: object
      properties:
        content:
          type: array
          items:
            $ref: '#/components/schemas/Contact'
        totalPages:
          type: integer
        totalElements:
          type: integer
        size:
          type: integer
        number:
          type: integer
  parameters:
    Page:
      name: page
      in: query
      required: false
      description: Zero-based page index.
      schema:
        type: integer
        default: 0
    Id:
      name: id
      in: path
      required: true
      description: The UUID of the resource.
      schema:
        type: string
        format: uuid
    Size:
      name: size
      in: query
      required: false
      description: Page size (max 250 for most collections).
      schema:
        type: integer
        default: 25
  responses:
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: The request payload failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    TooManyRequests:
      description: Rate limit of 2 requests per second exceeded.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid Bearer API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Bearer API key generated by the account owner at https://app.lexware.de/addons/public-api and passed as `Authorization: Bearer YOUR_API_KEY`.'