generated: '2026-09-05'
method: searched
source: https://www.clevelandcliffs.com/doing-business/for-outside-processors
note: >-
  There is no API sandbox, no test/live key separation and no hosted console, because there is no
  API. What Cleveland-Cliffs does publish is an EDI onboarding test path: a downloadable X12
  transaction testing template enumerating every transaction currently in use at the four plants,
  with the stated rule that business requirements decide which transactions and test cases must be
  tested. No test values, magic identifiers or credentials are published - onboarding test partner
  IDs are exchanged bilaterally.
test_live_separation: none-published
key_prefixes: []
test_values: []
fixtures:
  - name: X12 transaction testing template
    format: application/vnd.ms-excel (.xls)
    url: https://d1io3yog0oux5.cloudfront.net/clevelandcliffs/files/pages/clevelandcliffs/db/1183/description/x12-transaction-testing-template.xls
    http_status: 200
    bytes: 25088
    description: >-
      "The testing template provides a list of all available transactions currently in use at our
      Burns Harbor, Cleveland, Indiana Harbor and Kote plants. Business requirements will dictate
      which of these transactions and test cases will need to be tested, but all of our
      specifications are available on this page."
test_environments:
  - name: EDI certification / test interchange
    access: bilateral - arranged during trading-partner onboarding
    self_service: false
  - name: Cliffs Customer Service Center (cert.cliffssteel.com)
    note: >-
      Despite the hostname, this is the production mill-test-certificate lookup application, not a
      certification/test environment. Login-gated (HTTP 200, "Cliffs CSC Login").
    self_service: false