generated: '2026-09-12'
method: probed
source: >-
  Live anonymous HTTPS requests against every Greenbrier API surface on 2026-09-12, plus the OIDC
  discovery document at https://shop.gbrx.com/.well-known/openid-configuration
note: >-
  Greenbrier publishes no API authentication documentation because it publishes no developer
  program. This profile was established by probing: every catalogued API answered a full, correct
  response to an unauthenticated request, and every gated Greenbrier surface answered 401 or a login
  form. Nothing here is inferred from prose.
summary:
  public_apis_require_credentials: false
  api_keys_issued: false
  oauth_for_apis: false
  signup_required: false
  rate_limit_on_anonymous_access: not_observed
apis:
  - api: Greenbrier Tank Car Gauge Table API
    host: tankcar.gbrx.com
    schemes: []
    model: none
    evidence: >-
      GET https://tankcar.gbrx.com/api/car/marks returned 200 application/json with 144 records and
      no Authorization header, no cookie and no key. Same for the gauge-table, gauge-tables,
      valid-car-number-list and /export/ routes.
    write_surface: none
  - api: Greenbrier Railcar Catalog API
    host: www.gbrx.com
    schemes:
      - type: none
        applies_to: read (GET)
      - type: http
        scheme: basic
        applies_to: write (POST/PUT/PATCH/DELETE)
        note: >-
          WordPress application passwords. Not part of the public surface, not documented by
          Greenbrier, and not exercised by this profile.
    model: anonymous-read
    evidence: >-
      GET https://www.gbrx.com/wp-json/wp/v2/railcars?per_page=1 returned 200 with X-WP-Total 85 and
      no credentials. The route index lists POST/PUT/PATCH/DELETE on the same routes; those require
      WordPress authentication.
    write_surface: credentialed-only
  - api: Greenbrier Aftermarket Parts Store API
    host: www.gbrx.com
    schemes:
      - type: none
        applies_to: product/category/attribute reads
      - type: cookie
        name: Nonce / cart token
        applies_to: cart and checkout routes
        note: >-
          The /wc/store/v1/cart and /wc/store/v1/checkout routes are session-scoped and require a
          WooCommerce Store API nonce. Those routes are deliberately excluded from the catalogued
          contract.
    model: anonymous-read
    evidence: >-
      GET https://www.gbrx.com/wp-json/wc/store/v1/products?per_page=1 returned 200 with X-WP-Total
      207 and no credentials.
    write_surface: session-scoped
  - api: Greenbrier Press Room API
    host: www.gbrx.com
    schemes:
      - type: none
        applies_to: read (GET)
    model: anonymous-read
    evidence: GET /wp-json/wp/v2/posts?per_page=1 returned 200 with X-WP-Total 245 and no credentials.
    write_surface: credentialed-only
  - api: Greenbrier Site Content and Discovery API
    host: www.gbrx.com
    schemes:
      - type: none
        applies_to: read (GET)
    model: anonymous-read
    evidence: GET /wp-json/wp/v2/pages?per_page=1 returned 200 with X-WP-Total 51 and no credentials.
    write_surface: credentialed-only
gated_surfaces:
  - host: shop.gbrx.com
    product: Greenbrier Aftermarket Parts store (Salesforce Experience Cloud)
    model: oauth2 / openid-connect
    discovery: https://shop.gbrx.com/.well-known/openid-configuration
    issuer: https://shop.gbrx.com
    authorization_endpoint: https://shop.gbrx.com/services/oauth2/authorize
    token_endpoint: https://shop.gbrx.com/services/oauth2/token
    jwks_uri: https://shop.gbrx.com/id/keys
    grant_types: [authorization_code, refresh_token]
    pkce: S256
    evidence: >-
      The discovery document is served anonymously (200). Every data route under it answered 401
      INVALID_SESSION_ID. The scopes advertised are Salesforce's standard platform scope list, not a
      Greenbrier-authored scope vocabulary, so no scopes/ artifact is emitted.
    note: >-
      Salesforce Experience Cloud running on a Greenbrier-controlled host. Greenbrier does not
      document or issue API credentials against it; it backs a human parts-ordering storefront.
  - host: enspire.gbrx.com
    product: GMS Partners / Enspire railcar management software
    model: form-login
    evidence: >-
      https://enspire.gbrx.com/ serves an ASP.NET MVC login form. Every /.well-known/* path answers
      200 with the same login shell. No API surface is reachable anonymously.
  - host: grsecomm.gbrx.com
    product: GRS Wheelsets ordering portal
    model: form-login
    evidence: https://grsecomm.gbrx.com/ serves an ASP.NET login form; /.well-known/* paths 404.
  - host: proveedores.gbrx.com
    product: Greenbrier GIMSA supplier application (Monclova, Mexico)
    model: form-login
    evidence: https://proveedores.gbrx.com/ serves a login form; /.well-known/* paths 404.