Arthur Online
Arthur Assets API

Files and documents stored in Arthur and shared with owners, tenants and contractors. 2 documented paths.
Documentation GitHub OpenAPI
OpenAPI Specification

openapi: 3.1.0
info:
  title: Arthur Assets API
  version: 2.0.0
  description: Arthur Assets API - the assets surface of the Arthur API v2, the UK property management
    platform from Arthur Online (an Aareon company). Derived operation-for-operation from the provider's
    public Postman Documenter collection at https://developer.arthuronline.co.uk/. Every request is scoped
    to an Arthur entity via the mandatory X-EntityID header and authorised with an OAuth 2.0 Authorization
    Code access token.
  contact:
    name: Arthur Online API Support
    url: https://support.arthuronline.co.uk/
  termsOfService: https://www.arthuronline.co.uk/terms-and-conditions/
  x-derived-from: collections/arthur-online.postman_collection.json
  x-derived-by: API Evangelist enrichment pipeline
  x-derived-date: '2026-07-26'
servers:
- url: https://api.arthuronline.co.uk/v2
  description: Arthur API v2 production
security:
- arthurOAuth: []
tags:
- name: Assets
paths:
  /assets:
    get:
      operationId: listAssets
      summary: List Assets
      tags:
      - Assets
      parameters:
      - $ref: '#/components/parameters/EntityId'
      - name: type
        in: query
        required: false
        schema:
          type: string
        description: Filter by asset type (image, notimage, document, other)
      - name: main_image
        in: query
        required: false
        schema:
          type: string
        description: To display only main images, set this to true
      - name: created_from
        in: query
        required: false
        schema:
          type: string
        description: Filters assets by the created date, starting from the specified date. Use the format
          yyyy-mm-dd to input the date
      - name: created_to
        in: query
        required: false
        schema:
          type: string
        description: Filters assets by the created date, up to the specified date. Use the format yyyy-mm-dd
          to input the date.
      - name: model
        in: query
        required: false
        schema:
          type: string
        description: Filter by attachment type (Property, Unit, Tenancy, Transaction)
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/Limit'
      - $ref: '#/components/parameters/Sort'
      - $ref: '#/components/parameters/Direction'
      description: 'This retrieves a list of assets.


        See available filters below to customize the list of properties returned.'
      responses:
        '200':
          description: The request was completed successfully without errors.
          content:
            application/json:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: createAsset
      summary: Create Asset
      tags:
      - Assets
      parameters:
      - $ref: '#/components/parameters/EntityId'
      - $ref: '#/components/parameters/Strict'
      description: "Use this endpoint to create a new asset. The API will return the saved data and a\
        \ unique Asset ID.\n\nSupported Fields \n The following fields are supported for the request body\n\
        \nField \n Example \n Type \n Required? \n\nasset_type \n image \n String \n No \n\nname \n Inventory\
        \ \n String \n No \n\nshare_manager \n true \n Boolean \n No \n\nshare_tenant \n false \n Boolean\
        \ \n No \n\nshare_contractor \n true \n Boolean \n No \n\nshare_owner \n true \n Boolean \n No\
        \ \n\nfile \n base64 \n String \n Yes \n\nmime_type \n application/pdf \n String \n Yes \n\nfile_name\
        \ \n inventory \n String \n Yes"
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                asset_type:
                  type: string
                  example: image
                name:
                  type: string
                  example: Inventory
                share_manager:
                  type: boolean
                  example: true
                share_tenant:
                  type: boolean
                  example: false
                share_contractor:
                  type: boolean
                  example: true
                share_owner:
                  type: boolean
                  example: true
                file:
                  type: string
                  example: base64
                mime_type:
                  type: string
                  example: application/pdf
                file_name:
                  type: string
                  example: inventory
              required:
              - file
              - mime_type
              - file_name
            example:
              asset_type: image
              name: name of asset
              share_manager: true
              share_tenant: true
              share_owner: true
              share_contractor: true
              file: pdf file converted to base64 string
              mime_type: application/pdf
              file_name: inventory
      responses:
        '200':
          description: The request was completed successfully without errors.
          content:
            application/json:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /assets/{asset_id}:
    get:
      operationId: viewAsset
      summary: View Asset
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        description: Arthur asset id.
        schema:
          type: integer
      - $ref: '#/components/parameters/EntityId'
      description: 'This API endpoint retrieves the details of a single asset, identified by its unique 
        asset_id .


        Use this endpoint to view the specific details of an asset.'
      responses:
        '200':
          description: The request was completed successfully without errors.
          content:
            application/json:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateAsset
      summary: Update Asset
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        description: Arthur asset id.
        schema:
          type: integer
      - $ref: '#/components/parameters/EntityId'
      - $ref: '#/components/parameters/Strict'
      description: "This endpoint updates an existing asset using the same fields as the 'Add Asset' endpoint.\
        \ Any fields that are not provided will not be changed. The API will return the updated data for\
        \ the asset in the response.\n\nSupported Fields \n The following fields are supported for the\
        \ request body\n\nField \n Example \n Type \n Required? \n\nasset_type \n image \n String \n No\
        \ \n\nname \n inventory \n String \n No \n\nshare_manager \n true \n Boolean \n No \n\nshare_tenant\
        \ \n false \n Boolean \n No \n\nshare_contractor \n true \n Boolean \n No \n\nshare_owner \n true\
        \ \n Boolean \n No \n\nfile \n base64 \n String \n No \n\nmime_type \n application/pdf \n String\
        \ \n No \n\nfile_name \n inventory \n String \n No"
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                asset_type:
                  type: string
                  example: image
                name:
                  type: string
                  example: inventory
                share_manager:
                  type: boolean
                  example: true
                share_tenant:
                  type: boolean
                  example: false
                share_contractor:
                  type: boolean
                  example: true
                share_owner:
                  type: boolean
                  example: true
                file:
                  type: string
                  example: base64
                mime_type:
                  type: string
                  example: application/pdf
                file_name:
                  type: string
                  example: inventory
            example:
              asset_type: image
              name: name of updated asset
              share_manager: true
              share_tenant: false
              share_owner: true
              share_contractor: true
              file: pdf file converted to base64 string
              mime_type: application/pdf
              file_name: inventory
      responses:
        '200':
          description: The request was completed successfully without errors.
          content:
            application/json:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteAsset
      summary: Delete Asset
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        description: Arthur asset id.
        schema:
          type: integer
      - $ref: '#/components/parameters/EntityId'
      description: This endpoint deletes an existing asset record using the asset id .
      responses:
        '200':
          description: The request was completed successfully without errors.
          content:
            application/json:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  securitySchemes:
    arthurOAuth:
      type: oauth2
      description: OAuth 2.0 Authorization Code flow. Access tokens are valid for 14 days; refresh tokens
        for 21 days. Register an application in Arthur Settings > OAuth Applications to obtain a client_id
        and client_secret.
      flows:
        authorizationCode:
          authorizationUrl: https://auth.arthuronline.co.uk/oauth/authorize
          tokenUrl: https://auth.arthuronline.co.uk/oauth/token
          refreshUrl: https://auth.arthuronline.co.uk/oauth/token
          scopes: {}
  parameters:
    EntityId:
      name: X-EntityID
      in: header
      required: true
      description: The Arthur entity (account) the request is scoped to. Mandatory on every API call.
      schema:
        type: string
    Page:
      name: page
      in: query
      required: false
      description: Page number, between 1 and the total number of pages.
      schema:
        type: integer
        minimum: 1
    Limit:
      name: limit
      in: query
      required: false
      description: Items per page, between 1 and 100.
      schema:
        type: integer
        minimum: 1
        maximum: 100
    Sort:
      name: sort
      in: query
      required: false
      description: Field to sort the collection by.
      schema:
        type: string
    Direction:
      name: direction
      in: query
      required: false
      description: Sort direction.
      schema:
        type: string
        enum:
        - ASC
        - DESC
    Strict:
      name: strict
      in: query
      required: false
      description: When true, abort the request instead of auto-creating an unknown Simple type. POST
        and PUT only.
      schema:
        type: boolean
  schemas:
    Pagination:
      type: object
      description: Pagination block returned on every list response.
      properties:
        page:
          type: integer
        current:
          type: integer
        count:
          type: integer
        pageCount:
          type: integer
        limit:
          type: integer
    Error:
      type: object
      description: Arthur error envelope.
      properties:
        status:
          type: integer
        error:
          type: string
          description: Machine-readable error code, e.g. expired_token.
        message:
          type: string
  responses:
    BadRequest:
      description: The request was invalid or malformed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing, invalid or expired access token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error: expired_token
            message: This token has expired.
    NotFound:
      description: The request was sent to a location that does not exist in the API.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
Arthur Assets API

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OpenAPI Specification
