generated: '2026-07-23'
method: searched
source: https://docs.highnote.com/docs/developers/api/testing-the-api
description: >-
  Highnote provides a full Test environment that replicates Live functionality, plus GraphQL
  simulate* mutations to drive card transaction lifecycles, and 3DS/decline triggers.
environments:
  test:
    graphql_endpoint: https://api.us.test.highnote.com/graphql
    dashboard: https://dashboard.highnote.com
    api_explorer: https://highnote.com/explorer
    detail: Replicates the full functionality of Live; requires a Test-mode API key generated in the Dashboard.
  live:
    graphql_endpoint: https://api.us.highnote.com/graphql
key_separation:
  detail: >-
    API keys are scoped to Test or Live mode and generated per environment in the Highnote
    Dashboard; switch modes in the Dashboard. Do not enter production data in the Test environment.
simulation_mutations:
  - name: simulateAuthorization
    purpose: Simulate a card authorization.
  - name: simulateClearing
    purpose: Simulate clearing of an authorization.
  - name: simulateSingleStepAuthAndClear
    purpose: Simulate a combined single-message auth + clear.
  - name: simulateReversal
    purpose: Reverse an authorization that has not cleared (full or partial).
  - name: simulateRefund
    purpose: Refund a cleared transaction (full or partial).
  - name: simulateAdjustment
    purpose: Simulate a transaction adjustment.
decline_and_3ds_triggers:
  - {network: visa, field: cavvResultCode, value: FAILED, result: INVALID_3DS_VERIFICATION decline}
  - {network: mastercard, field: aavResultCode, value: AAV_FAILED_VALIDATION, result: INVALID_3DS_VERIFICATION decline}
related_simulations:
  - {name: sim-fleet-transactions, docs: https://docs.highnote.com/docs/issuing/transactions/sim-fleet-transactions}
  - {name: sim-collaborative-authorization, docs: https://docs.highnote.com/docs/issuing/spend-controls/sim-collaborative-authorization}
  - {name: sim-underwriting-decisions, docs: https://docs.highnote.com/docs/issuing/credit/simulations/sim-underwriting-decisions}
test_values:
  published_cards: none
  detail: >-
    Highnote does not publish fixed magic test PAN/BIN values or magic amounts; simulations
    reference real resources you create in Test (financial accounts, payment cards, card IDs).
docs: https://docs.highnote.com/docs/developers/api/testing-the-api