generated: '2026-06-20'
method: searched
spec_type: Webhooks
source: openapi/shift4-payment-api.yml (webhooks{}) + https://docs.shift4.com
notes: >-
  Shift4 does not publish a standalone AsyncAPI document. Its event surface is
  defined as OpenAPI 3.1 webhooks{} — outbound HTTP POST notifications from the
  Shift4 gateway to a merchant-registered callback URL (application/json). Three
  event families are documented. This captures the webhook catalog; the
  authoritative payload schemas live inline in the OpenAPI webhooks section.
delivery:
  direction: outbound (Shift4 -> merchant callback URL)
  transport: HTTPS POST
  content_type: application/json
webhooks:
  - name: ach-notification
    operationId: achnotification
    summary: ACH transaction status notification
    description: >-
      Provides asynchronous status of an ACH transaction (verify/sale/refund)
      as the bank-account payment settles or returns.
    source_operation: openapi/shift4-payment-api.yml#achnotification
    docs: https://docs.shift4.com/guides/alternative-payments/ach
  - name: paymentlinks-notification
    operationId: paymentlinksnotification
    summary: Payment Links status notification
    description: >-
      Provides status updates for a hosted payment link (paid, expired,
      cancelled, etc.).
    source_operation: openapi/shift4-payment-api.yml#paymentlinksnotification
    docs: https://docs.shift4.com/guides/core-concepts/payment-links
  - name: checkoutsessions-notification
    operationId: checkoutsessionsnotification
    summary: Checkout Sessions status notification
    description: >-
      Provides status updates for a hosted checkout session as the online
      payment is collected.
    source_operation: openapi/shift4-payment-api.yml#checkoutsessionsnotification