Cleveland Cliffs Authentication

generated: '2026-09-05'
method: probed
source: https://login.clevelandcliffs.com/.well-known/openid-configuration
docs: https://www.clevelandcliffs.com/doing-business
note: >-
  Cleveland-Cliffs publishes no developer API and therefore no API-key or bearer-token contract.
  It does operate a first-party identity surface: an Okta tenant on its own vanity domain
  login.clevelandcliffs.com, whose OIDC discovery document and RFC 8414 authorization-server
  metadata are served anonymously and declare issuer https://login.clevelandcliffs.com. That is
  the only machine-readable authentication contract the company publishes. It fronts the
  employee/partner applications, not a public API. The B2B integration surface (EDI over SFTP
  or an IBM Sterling VAN) authenticates out of band with SFTP credentials and trading-partner
  IDs negotiated bilaterally, and the four portal applications (Outside Processors, iSupplier,
  Customer Service Center, Vendor Inquiry) each present their own username/password form.
summary:
  types: [openIdConnect, oauth2]
  api_key_in: []
  oauth2_flows: [authorizationCode, implicit, clientCredentials, deviceCode, ciba, refreshToken]
  public_api_auth: none-published
schemes:
  - name: cleveland-cliffs-okta-oidc
    type: openIdConnect
    openIdConnectUrl: https://login.clevelandcliffs.com/.well-known/openid-configuration
    issuer: https://login.clevelandcliffs.com
    sources: [well-known/cleveland-cliffs-openid-configuration.json]
    endpoints:
      authorization: https://login.clevelandcliffs.com/oauth2/v1/authorize
      token: https://login.clevelandcliffs.com/oauth2/v1/token
      userinfo: https://login.clevelandcliffs.com/oauth2/v1/userinfo
      jwks: https://login.clevelandcliffs.com/oauth2/v1/keys
      revocation: https://login.clevelandcliffs.com/oauth2/v1/revoke
      introspection: https://login.clevelandcliffs.com/oauth2/v1/introspect
      end_session: https://login.clevelandcliffs.com/oauth2/v1/logout
      device_authorization: https://login.clevelandcliffs.com/oauth2/v1/device/authorize
      pushed_authorization_request: https://login.clevelandcliffs.com/oauth2/v1/par
      dynamic_client_registration: https://login.clevelandcliffs.com/oauth2/v1/clients
    id_token_signing_alg_values_supported: [RS256]
    token_endpoint_auth_methods_supported:
      - client_secret_basic
      - client_secret_post
      - client_secret_jwt
      - private_key_jwt
      - none
    code_challenge_methods_supported: [S256]
    dpop_signing_alg_values_supported: [RS256, RS384, RS512, ES256, ES384, ES512]
  - name: cleveland-cliffs-okta-oauth2
    type: oauth2
    sources: [well-known/cleveland-cliffs-oauth-authorization-server.json]
    issuer: https://login.clevelandcliffs.com
    flows:
      - flow: authorizationCode
        authorizationUrl: https://login.clevelandcliffs.com/oauth2/v1/authorize
        tokenUrl: https://login.clevelandcliffs.com/oauth2/v1/token
      - flow: clientCredentials
        tokenUrl: https://login.clevelandcliffs.com/oauth2/v1/token
      - flow: deviceCode
        deviceAuthorizationUrl: https://login.clevelandcliffs.com/oauth2/v1/device/authorize
        tokenUrl: https://login.clevelandcliffs.com/oauth2/v1/token
      - flow: implicit
        authorizationUrl: https://login.clevelandcliffs.com/oauth2/v1/authorize
out_of_band:
  - surface: EDI (X12 4010) for outside processors
    transport: SFTP preferred; third-party VAN via IBM Sterling Supply Chain Business Network Hub
    auth: SFTP credentials / trading-partner identifiers exchanged bilaterally during onboarding
    docs: https://www.clevelandcliffs.com/doing-business/for-outside-processors
  - surface: Outside Processors Portal
    auth: username + password form
    url: https://op.cliffssteel.com
  - surface: iSupplier Portal
    auth: username + password form
    url: https://isupplier.cliffssteel.com
  - surface: Customer Service Center (mill test certificates)
    auth: username + password form
    url: https://cert.cliffssteel.com
  - surface: Vendor Inquiry (AP / invoice status)
    auth: username + password form
    url: https://www.clevelandcliffs.us/vendor_inquiry/