mlsgrid Property API

openapi: 3.2.0
info:
  title: MLS Grid RESO Web Property API
  description: 'The MLS Grid RESO Web API is a normalized, RESO Data Dictionary–compliant OData v4 Web API for replicating

    Multiple Listing Service (MLS) data across the dozens of participating boards on the MLS Grid network.'
  version: 2.0.0
  contact:
    name: MLS Grid Support
    email: support@mlsgrid.com
    url: https://www.mlsgrid.com
  license:
    name: MLS Grid Master Data License Agreement
    url: https://www.mlsgrid.com
  x-logo:
    url: https://www.mlsgrid.com
servers:
- url: https://api.mlsgrid.com/v2
  description: MLS Grid Web API v2 (production)
security:
- bearerAuth: []
tags:
- name: Property
  description: Property listings (RESO Data Dictionary Property resource).
paths:
  /Property:
    get:
      tags:
      - Property
      summary: List Properties
      description: Replicate Property listings filtered by `OriginatingSystemName` and `ModificationTimestamp`. Use `$expand=Media,Rooms,UnitTypes` to include nested resources and `@odata.nextLink` for pagination.
      operationId: listProperties
      parameters:
      - $ref: '#/components/parameters/Filter'
      - $ref: '#/components/parameters/Select'
      - $ref: '#/components/parameters/Expand'
      - $ref: '#/components/parameters/Top'
      - $ref: '#/components/parameters/Count'
      responses:
        '200':
          description: Collection of Property records.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PropertyCollection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /Property('{ListingKey}'):
    get:
      tags:
      - Property
      summary: Get Property by Key
      description: Retrieve a single Property record by its prefixed `ListingKey` (e.g. `actris-1234567`).
      operationId: getProperty
      parameters:
      - name: ListingKey
        in: path
        required: true
        schema:
          type: string
        description: Prefixed MLS Grid listing key.
      - $ref: '#/components/parameters/Expand'
      responses:
        '200':
          description: A single Property record.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Property'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Property not found.
components:
  schemas:
    Property:
      type: object
      description: RESO Data Dictionary Property resource. Only fields present in the originating MLS are populated.
      properties:
        ListingKey:
          type: string
          description: Prefixed MLS Grid listing key (e.g. `actris-1234567`).
        OriginatingSystemName:
          type: string
          description: Source MLS identifier (e.g. `actris`, `mred`, `nwmls`).
        StandardStatus:
          type: string
          description: RESO StandardStatus enumeration.
          enum:
          - Active
          - ActiveUnderContract
          - Pending
          - Hold
          - Withdrawn
          - Expired
          - Closed
          - Canceled
          - ComingSoon
          - Delete
          - Incomplete
        PropertyType:
          type: string
          description: RESO PropertyType enumeration.
          enum:
          - Residential
          - ResidentialIncome
          - ResidentialLease
          - CommercialSale
          - CommercialLease
          - BusinessOpportunity
          - Farm
          - Land
          - ManufacturedInPark
        ListPrice:
          type: number
        ModificationTimestamp:
          type: string
          format: date-time
        PhotosChangeTimestamp:
          type: string
          format: date-time
        MlgCanView:
          type: boolean
          description: Indicates whether the listing may currently be viewed under license terms.
        MlgCanUse:
          type: array
          description: Allowed use cases for the listing (e.g. `IDX`, `VOW`, `BO`, `PT`).
          items:
            type: string
        Media:
          type: array
          items:
            $ref: '#/components/schemas/Media'
        Rooms:
          type: array
          items:
            $ref: '#/components/schemas/Room'
        UnitTypes:
          type: array
          items:
            $ref: '#/components/schemas/UnitType'
    Media:
      type: object
      properties:
        MediaKey:
          type: string
        ResourceRecordKey:
          type: string
          description: Foreign key back to Property (or other resource).
        OriginatingSystemName:
          type: string
        MediaURL:
          type: string
          description: URL for downloading a local copy. Direct hot-linking is not permitted.
        MediaCategory:
          type: string
        Order:
          type: integer
        MediaModificationTimestamp:
          type: string
          format: date-time
    UnitType:
      type: object
      properties:
        UnitTypeKey:
          type: string
        UnitTypeType:
          type: string
        UnitTypeBedsTotal:
          type: integer
        UnitTypeBathsTotal:
          type: number
    PropertyCollection:
      type: object
      properties:
        '@odata.context':
          type: string
        '@odata.nextLink':
          type: string
        value:
          type: array
          items:
            $ref: '#/components/schemas/Property'
    Room:
      type: object
      properties:
        RoomKey:
          type: string
        RoomType:
          type: string
        RoomLevel:
          type: string
        RoomLength:
          type: number
        RoomWidth:
          type: number
  responses:
    RateLimited:
      description: Rate limit exceeded. The MLS Grid Web API enforces 2 RPS, 7,200 requests/hour, 40,000 requests/24h, and 4 GB/hour download caps. Repeated violations may suspend the token.
      headers:
        Retry-After:
          schema:
            type: integer
          description: Seconds until the client may retry.
    Unauthorized:
      description: Missing or invalid bearer token.
  parameters:
    Select:
      name: $select
      in: query
      description: Comma-separated list of fields to return. Reduces payload size.
      schema:
        type: string
      example: ListingKey,StandardStatus,ListPrice,ModificationTimestamp
    Expand:
      name: $expand
      in: query
      description: Comma-separated list of related resources to expand inline. Common values for Property are `Media`, `Rooms`, and `UnitTypes`.
      schema:
        type: string
      example: Media,Rooms,UnitTypes
    Filter:
      name: $filter
      in: query
      description: 'OData `$filter` expression. Required pattern uses `OriginatingSystemName eq ''<system>''` combined with

        `ModificationTimestamp gt <UTC datetime>` for incremental replication. Replication queries are

        restricted to a limited set of searchable fields documented per resource.

        '
      schema:
        type: string
      example: OriginatingSystemName eq 'actris' and ModificationTimestamp gt 2026-01-01T00:00:00Z
    Top:
      name: $top
      in: query
      description: Maximum number of records to return per page.
      schema:
        type: integer
        maximum: 1000
    Count:
      name: $count
      in: query
      description: When `true`, includes `@odata.count` in the response.
      schema:
        type: boolean
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: OAuth2
      description: Long-lived OAuth 2.0 bearer token issued via the MLS Grid web application token tab.