Shift4 · OpenAPI Overlay 1.0.0

API Evangelist enhancements for Shift4 Payment API

2 actions 2 updates update extends openapi/shift4-payment-api.yml
Derived by API Evangelist Built from the contracts Shift4 publishes. Shift4 did not publish this file.
View Overlay File View on GitHub Overlay Specification

What the actions change

x-apievangelist-ratingx-apievangelist-providerx-apievangelist-categoryx-apievangelist-authx-apievangelist-idempotencyx-apievangelist-sandboxx-apievangelist-webhooksx-apievangelist-artifacts

Targets 1

$.info

OpenAPI Overlay

Raw ↑ 
overlay: 1.0.0
info:
  title: API Evangelist enhancements for Shift4 Payment API
  version: 1.0.0
extends: openapi/shift4-payment-api.yml
actions:
  - target: $.info
    update:
      x-apievangelist-rating: 4
      x-apievangelist-provider: shift4
      x-apievangelist-category: payments
      x-apievangelist-auth: header AccessToken (apiKey) + HMAC-SHA256 request signing
      x-apievangelist-idempotency: invoice-scoped duplicate detection (INVMUSTEXIST API option)
      x-apievangelist-sandbox: https://api.shift4test.com/api/rest/v1
      x-apievangelist-webhooks: [ach-notification, paymentlinks-notification, checkoutsessions-notification]
  - target: $.info
    update:
      x-apievangelist-artifacts:
        errors: errors/shift4-error-codes.yml
        decline_codes: errors/shift4-decline-codes.yml
        sandbox: sandbox/shift4-sandbox.yml
        conventions: conventions/shift4-conventions.yml
        authentication: authentication/shift4-authentication.yml
        lifecycle: lifecycle/shift4-lifecycle.yml
        data_model: data-model/shift4-data-model.yml
        changelog: changelog/shift4-changelog.yml

Work with this as data

Every overlay here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for openapi overlays

4 MCP tools reach this
  • find_overlaysBrowse and filter every overlay in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This overlay 
curl "https://apis.io/api/v1/overlays/shift4-payment-api-overlay"
All openapi overlays 
curl "https://apis.io/api/v1/overlays?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.