generated: '2026-08-12'
method: searched
source: https://open-docs.flashexpress.com/#api-environment
note: >-
  Flash Express operates a genuine two-environment separation: a production Open API host
  and a separate "training" (TRA) host with its own base URL. That is the whole of the
  published sandbox surface. Flash Express does NOT publish magic test values — there are
  no test tracking numbers, no test postal codes, no test merchant ids, no simulated
  decline or exception triggers, and no time-simulation tooling documented anywhere in the
  reference. Credentials for the training environment are issued by Flash Express support
  in the same way as production credentials; there is no self-service sandbox signup and no
  test-key prefix that distinguishes a test credential from a live one. No test values are
  invented here.
environments:
- name: production
  base_url: https://open-api.flashexpress.com
  live: true
- name: training
  base_url: https://open-api-tra.flashexpress.com
  live: false
  aliases: [TRA, training ENV]
  description: >-
    Non-production environment for merchant integration testing. Documented in the API
    Environment section alongside production.
separation:
  mechanism: distinct base host
  key_prefix: null
  mode_parameter: null
  note: >-
    Environment is selected purely by which host you call. There is no mode flag in the
    request and no prefix on the merchant id or secret key, so a credential cannot be
    inspected to tell whether it is a test or live credential. Calling the wrong host with
    the wrong credential surfaces as code 1001 "customer not found" rather than as an
    explicit environment mismatch.
credentials:
  self_service: false
  issuance: >-
    Contact Flash Express official support staff to obtain or reset the security key.
    Applies to both environments.
test_values:
  published: false
  test_cards: []
  test_accounts: []
  test_tracking_numbers: []
  test_addresses: []
  note: >-
    None published. The documentation's inline examples use obviously-masked placeholders
    (merchant id "AAXXXX", tracking number "TH0112XXXXXX", merchant order number
    "123456789XXXX") which are illustrative masks, not working test fixtures.
test_clock:
  supported: false
fixtures_and_triggers:
  supported: false
  note: No event-trigger or fixture tooling is documented for simulating parcel status transitions in the training environment.
reference_clients:
  note: >-
    Four downloadable reference client implementations (C#, PHP, Java, Python) are
    published and can be pointed at either environment. See packages/flash-express-packages.yml.
summary:
  sandbox_present: true
  self_service_signup: false
  magic_test_values: false
  time_simulation: false