generated: '2026-08-28'
method: searched
source: >-
  https://www.zillowgroup.com/developers/api/rentals/lead-api/,
  https://www.zillowgroup.com/developers/api/mls-broker-data/reviews-api/,
  https://dotloop.github.io/public-api/
description: >-
  Event and webhook surface for Zillow Group. Zillow Group advertises webhook delivery on its
  own developer portal but publishes no AsyncAPI document and no public event catalog for its
  own callbacks; the only enumerated event catalog on the surface belongs to the dotloop
  subsidiary. This file captures the webhook surface itself so the event posture is recorded
  rather than dropped.
asyncapi_spec_published: false
asyncapi_probe:
  note: >-
    /asyncapi.yaml, /asyncapi.json and an event-catalog page were not found on any Zillow Group
    or subsidiary host; the well-known probe on 2026-08-28 returned 404/401/403 across all seven
    hosts. See well-known/zillow-group-well-known.yml.
webhooks:
  - name: Zillow Rentals Lead API
    owner: Zillow Group (Zillow Rentals)
    direction: outbound (Zillow POSTs to a customer-supplied endpoint)
    transport: HTTPS POST callback
    payload_encoding: application/x-www-form-urlencoded
    signature: null
    signature_note: >-
      No signing secret, HMAC header or mutual TLS is documented — a receiver has no published
      way to verify that a lead delivery actually came from Zillow.
    retry_policy: not documented
    event_catalog_published: false
    docs: https://www.zillowgroup.com/developers/api/rentals/lead-api/
    guide: https://s3.amazonaws.com/files.hotpads.com/+guides/Lead+API+Guide.pdf
    guide_probe:
      url: https://s3.amazonaws.com/files.hotpads.com/+guides/Lead+API+Guide.pdf
      status: 200
      bytes: 258680
      note: >-
        The only integration guide for this API is a PDF on S3 — machine-unreadable, and the
        reason this surface has no structured event catalog here.
    provider_constraint: >-
      Zillow Group states "Our data format is URL-encoded and we are unable to make changes to
      our API fields or form."
    onboarding: rentalfeeds@zillow.com for new integrations; existing CRMs via Rentals Support.
  - name: Zillow Reviews API notifications
    owner: Zillow Group (via Bridge Interactive)
    direction: outbound notification on review creation
    transport: not documented
    event_catalog_published: false
    docs: https://www.zillowgroup.com/developers/api/mls-broker-data/reviews-api/
    evidence: >-
      Zillow Group describes the capability as "get notified when a new review is created by a
      prospect" but publishes no delivery mechanism, payload shape or event names.
  - name: dotloop Transaction Management webhooks
    owner: dotloop (a Zillow Group company)
    direction: outbound HTTPS POST to a subscription URL
    transport: HTTPS POST, JSON
    status: Initial Release
    signature: 'X-DOTLOOP-SIGNATURE (HMAC over "<X-DOTLOOP-TIMESTAMP>.<raw body>") + X-DOTLOOP-TIMESTAMP'
    delivery_timeout: 5 seconds
    event_retention: 90 days
    event_count: 16
    events:
      - LOOP_CREATED
      - LOOP_UPDATED
      - LOOP_MERGED
      - LOOP_PARTICIPANT_CREATED
      - LOOP_PARTICIPANT_UPDATED
      - LOOP_PARTICIPANT_DELETED
      - CONTACT_CREATED
      - CONTACT_UPDATED
      - CONTACT_DELETED
      - PROFILE_UPDATED
      - USER_PROFILE_ACTIVATED
      - USER_PROFILE_DEACTIVATED
      - USER_ADDED_TO_PROFILE
      - USER_REMOVED_FROM_PROFILE
      - SUBSCRIPTION_REMOVED
      - SUBSCRIPTION_DISABLED
    docs: https://dotloop.github.io/public-api/
    note: >-
      Recorded here because Zillow Group lists Transaction Management as one of its own
      developer APIs. The full subscription/event API is profiled in all/dotloop; this entry is
      the Zillow Group portal's view of it, not a duplicate of that profile.
gaps:
  - No AsyncAPI document for any event surface.
  - Zillow Group's own two webhook surfaces publish no event names and no payload schema.
  - The Rentals Lead API delivers unsigned callbacks, and its only guide is a PDF.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com