generated: '2026-07-18'
method: searched
source: https://developers.useascend.com/
summary: >-
  Ascend exposes a dedicated sandbox/test environment distinct from production. Sandbox API keys are
  issued on request; there is no self-serve key generation documented.
environments:
- mode: test
  base_url: https://sandbox.api.useascend.com
  description: Test server (sandbox).
- mode: live
  base_url: https://api.useascend.com
  description: Production server.
test_keys:
  provisioning: Request a sandbox API key by contacting developers@useascend.com
  self_serve: false
webhooks_test:
  note: Webhook keys and subscriptions (including environment) are provisioned via developers@useascend.com.
test_values:
  note: Ascend does not publish a public list of magic test card numbers or fixtures; test data is provisioned per sandbox account.