generated: '2026-09-17'
method: probed
source: >-
  https://www.tronox.com/.well-known/oauth-authorization-server/,
  https://www.tronox.com/.well-known/oauth-protected-resource/,
  https://www.tronox.com/supplier/coupa-supplier-portal/,
  https://www.tronox.com/ethics-and-governance/data-privacy/
summary: >-
  Tronox publishes no public REST API and therefore no OpenAPI securitySchemes. One
  authentication surface is observable on a Tronox host: OAuth 2.0 (authorization code with
  PKCE) in front of the MCP endpoint served by the WordPress MCP Adapter on www.tronox.com.
  Supplier transactions (registration, sourcing events, purchase orders, ASNs, invoices) run on
  the Coupa Supplier Portal, a third-party platform authenticated by Coupa's own accounts, not
  by any Tronox-issued credential. Tronox does not issue a public API key.

schemes:
- id: mcp_oauth2
  type: oauth2
  surface: https://www.tronox.com/wp-json/mcp/mcp-oauth-server
  flows:
    authorizationCode:
      authorizationUrl: https://www.tronox.com/oauth/authorize
      tokenUrl: https://www.tronox.com/oauth/token
      refreshUrl: https://www.tronox.com/oauth/token
      revocationUrl: https://www.tronox.com/oauth/revoke
      scopes:
        mcp: Access the MCP server surface published by www.tronox.com
  pkce_required_methods: [S256]
  token_endpoint_auth_methods_supported: [none]
  client_registration: >-
    No RFC 7591 dynamic client registration endpoint is advertised. The authorization server
    sets client_id_metadata_document_supported = true, so a client identifies itself with a
    URL to a client-id metadata document rather than a pre-registered client_id.
  bearer_methods_supported: [header]
  anonymous_response: 401 mcp_unauthorized ("MCP authentication required.")
  www_authenticate: 'Bearer realm="https://www.tronox.com", resource_metadata="https://www.tronox.com/.well-known/oauth-protected-resource"'
  discovery_chain: >-
    The 401 carries a WWW-Authenticate header whose resource_metadata parameter points at the
    RFC 9728 document, which names https://www.tronox.com as the authorization server, whose
    RFC 8414 document names the authorize/token/revoke endpoints - the full MCP authorization
    discovery chain works anonymously.
  evidence: https://www.tronox.com/.well-known/oauth-authorization-server/
  evidence_status: 200

- id: coupa_supplier_portal
  type: delegated
  surface: Coupa Supplier Portal (third-party, supplier.coupahost.com)
  detail: >-
    Suppliers register and sign in with a Coupa Supplier Portal account and link it to Tronox;
    the FAQ on tronox.com covers registration, password reset and account merging inside
    Coupa. No Tronox credential, API key or integration token is described.
  evidence: https://www.tronox.com/supplier/coupa-supplier-portal/
  evidence_status: 200

not_published:
- api_keys: Tronox does not issue or document API keys.
- openid_connect: /.well-known/openid-configuration returns 404 on www.tronox.com.
- sso_for_customers: no customer portal or customer login is published on tronox.com.