generated: '2026-09-07'
method: probed
source: >-
  Live unauthenticated calls on 2026-09-07 against every FHEO baseURL, plus the
  response headers those calls returned. derive-authentication.py found no
  securitySchemes because there is no OpenAPI to read.
provider: Fair Housing and Equal Opportunity
providerId: fair-housing-and-equal-opportunity
summary: >-
  Every FHEO surface in this record is anonymously readable. No key, no token,
  no account, no registration. An unauthenticated GET against the FHAP grantee
  layer's /query endpoint returned HTTP 200 with feature data, and the service
  advertises capabilities "Query,Extract" only — there is no write surface to
  authenticate against.
schemes: []
scheme_count: 0
posture:
  anonymous_read: true
  registration_required: false
  api_key_required: false
  oauth2: false
  openid_connect: false
  mutual_tls: false
  write_surface: false
evidence:
  - url: https://services.arcgis.com/VTyQ9soqVukalItT/arcgis/rest/services/Fair_Housing_Assistance_Program_Grantees/FeatureServer/0/query?where=1%3D1&outFields=FHAP_NAME,STATE&returnGeometry=false&resultRecordCount=2&f=json
    method: GET
    credentials_sent: none
    http_status: 200
    result: features returned
  - url: https://services.arcgis.com/VTyQ9soqVukalItT/arcgis/rest/services/Fair_Housing_Assistance_Program_Grantees/FeatureServer?f=pjson
    method: GET
    credentials_sent: none
    http_status: 200
    result: 'capabilities: "Query,Extract"'
  - url: https://egis.hud.gov/arcgis/rest/services/affht/AffhtMapService/MapServer?f=pjson
    method: GET
    credentials_sent: none
    http_status: 200
    result: service metadata returned
optional_credential:
  supported: true
  note: >-
    The ArcGIS Online services vary on X-Esri-Authorization (the response
    carries `vary: X-Esri-Authorization`) and accept an Authorization or
    X-Esri-Authorization header, so an ArcGIS Online token CAN be presented.
    Presenting one is never required for these public layers; it only moves the
    request onto the caller's own ArcGIS organisation quota. This is Esri
    platform behaviour, not an FHEO-published auth scheme, which is why no
    scheme is listed above.
discovery:
  well_known_openid_configuration: 404
  well_known_oauth_authorization_server: 404
  note: >-
    Probed on www.hud.gov, hud.gov, www.huduser.gov, egis.hud.gov and
    hudgis-hud.opendata.arcgis.com. See
    well-known/fair-housing-and-equal-opportunity-well-known.yml.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com