generated: '2026-09-09'
method: searched
source: https://www.fhfa.gov/data/hpi
provider: Federal Housing Finance Agency
providerId: federal-housing-finance-agency
description: >-
  Lifecycle posture for the FHFA public data surface. FHFA publishes no API versioning policy,
  no deprecation policy, no Sunset/Deprecation header practice, no SLA and no status page.
  What it DOES publish — and publishes well — is a firm forward release calendar for the House
  Price Index, which is the closest thing this surface has to a change contract.
versioning:
  policy_published: false
  scheme: none
  detail: >-
    No version in path, header or media type. Data URLs are stable and are overwritten in
    place on each publication cycle.
deprecation:
  policy_published: false
  sunset_header: false
  deprecation_header: false
  detail: >-
    No deprecation policy page was found on fhfa.gov and no RFC 8594 Sunset or Deprecation
    header was observed on any response. NO Deprecation pointer is wired from this file.
  evidence:
    - url: https://www.fhfa.gov/hpi/download/monthly/hpi_master.json
      status: 200
      note: response headers carry no Sunset, Deprecation or Link rel=deprecation
sla:
  published: false
  detail: >-
    FHFA's API Terms of Service explicitly disclaims availability — the API is provided "AS IS"
    and "AS AVAILABLE", and FHFA "makes no representation nor warranty that the API will be
    error free or that access thereto will be continuous, uninterrupted, or not terminated."
  evidence:
    - url: https://www.fhfa.gov/about/fhfa-policies/api-terms-of-service
      status: 200
status_page:
  published: false
  detail: >-
    No status.fhfa.gov, no statuspage.io tenant and no uptime/incident page found. NO
    StatusPage pointer is wired from this file.
release_calendar:
  published: true
  url: https://www.fhfa.gov/data/hpi#ReleaseDates
  status: 200
  contact: HPIQuestions@fhfa.gov
  cadence: >-
    Monthly index on the last Tuesday of most months; a quarterly index (with monthly tables)
    replaces the monthly release in February, May, August and November.
  detail: >-
    FHFA publishes named release dates more than a year ahead. Transcribed verbatim from the
    HPI page on 2026-09-09.
  upcoming:
    - date: '2026-09-29'
      release_type: Monthly Index
      last_included_data: July 2026
    - date: '2026-10-27'
      release_type: Monthly Index
      last_included_data: August 2026
    - date: '2026-11-24'
      release_type: Quarterly Index (with Monthly Tables)
      last_included_data: September 2026 and 2026Q3
    - date: '2026-12-29'
      release_type: Monthly Index
      last_included_data: October 2026
    - date: '2027-01-26'
      release_type: Monthly Index
      last_included_data: November 2026
    - date: '2027-02-23'
      release_type: Quarterly Index (with Monthly Tables)
      last_included_data: December 2026 and 2026Q4
    - date: '2027-03-30'
      release_type: Monthly Index
      last_included_data: January 2027
    - date: '2027-04-27'
      release_type: Monthly Index
      last_included_data: February 2027
    - date: '2027-05-25'
      release_type: Quarterly Index (with Monthly Tables)
      last_included_data: March 2027 and 2027Q1
    - date: '2027-06-29'
      release_type: Monthly Index
      last_included_data: April 2027
    - date: '2027-07-27'
      release_type: Monthly Index
      last_included_data: May 2027
    - date: '2027-08-31'
      release_type: Quarterly Index (with Monthly Tables)
      last_included_data: June 2027 and 2027Q2
    - date: '2027-09-28'
      release_type: Monthly Index
      last_included_data: July 2027
    - date: '2027-10-26'
      release_type: Monthly Index
      last_included_data: August 2027
    - date: '2027-11-30'
      release_type: Quarterly Index (with Monthly Tables)
      last_included_data: September 2027 and 2027Q3
    - date: '2027-12-28'
      release_type: Monthly Index
      last_included_data: October 2027
data_currency:
  observed: >-
    hpi_master.json fetched 2026-09-09 carries observations from 1975 through 2026 across 472
    place identifiers and 16 type/flavor/frequency/level combinations.
  catalog_last_modified: '2025-03-11'
  catalog_note: >-
    /data/data.json returns last-modified Tue, 11 Mar 2025 — the Project Open Data catalog has
    not been regenerated in roughly 18 months even though the datasets it describes are still
    being republished on the calendar above. The catalog is the stale surface, not the data.
deprecated_operations: []