Shift4
Shift4 (NYSE: FOUR) is a US-based integrated payments and commerce technology company headquartered in Center Valley, Pennsylvania, and a Fortune 1000 business serving restaurants, hospitality, retail, gaming, stadiums, e-commerce, and nonprofit verticals. It operates as an end-to-end acquirer-processor, owning the full stack from its own gateway and card acquiring through in-person SkyTab POS hardware, online checkout, and alternative payment methods, and has expanded internationally through acquisitions including Finaro (Credorax), Global Blue, and others. Its public developer surface is genuinely API-native: a Redocly-powered developer portal at docs.shift4.com publishes the Shift4 Payment API, a single downloadable OpenAPI 3.1 definition (v1.7.57, 70 paths) covering card transactions, tokenization, gift cards, devices/terminals, ACH, QR and PayPal alternative payments, 3D Secure, payment links, checkout sessions, OCT payouts, and reporting, authenticated with a header AccessToken (API key) plus HMAC-SHA256 request signing and backed by webhook event notifications, a sandbox, SDKs, and a published Postman collection.
Shift4 publishes 21 APIs on the APIs.io network, including 3D Secure API, ACH API, Batches API, and 18 more. Tagged areas include Payments, United States, Payment Processing, Payment Gateway, and Acquiring.
The Shift4 catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Shift4’s developer surface includes authentication, documentation, API reference, getting-started guide, changelog, support, sandbox, and 29 more developer resources.
Kin Score
APIs 21
Individual APIs this provider publishes, each with its own machine-readable definition.
Shift4 3D Secure API
The 3D Secure API from Shift4 — 2 operation(s) for 3d secure.
Shift4 ACH API
The ACH API from Shift4 — 5 operation(s) for ach.
Shift4 Batches API
The Batches API from Shift4 — 1 operation(s) for batches.
Shift4 Cards API
The Cards API from Shift4 — 2 operation(s) for cards.
Shift4 Checkout Sessions API
The Checkout Sessions API from Shift4 — 2 operation(s) for checkout sessions.
Shift4 Credentials API
The Credentials API from Shift4 — 1 operation(s) for credentials.
Shift4 DCC API
The DCC API from Shift4 — 1 operation(s) for dcc.
Shift4 Devices API
The Devices API from Shift4 — 13 operation(s) for devices.
Shift4 Gift Cards API
The Gift Cards API from Shift4 — 9 operation(s) for gift cards.
Shift4 Merchants API
The Merchants API from Shift4 — 1 operation(s) for merchants.
Shift4 Mode API
The Mode API from Shift4 — 2 operation(s) for mode.
Shift4 OCT API
The OCT API from Shift4 — 2 operation(s) for oct.
Shift4 Payment Links API
The Payment Links API from Shift4 — 4 operation(s) for payment links.
Shift4 Pay Pal API
The PayPal API from Shift4 — 3 operation(s) for paypal.
Shift4 QR Payments API
The QR Payments API from Shift4 — 4 operation(s) for qr payments.
Shift4 Reports API
The Reports API from Shift4 — 1 operation(s) for reports.
Shift4 Risk API
The Risk API from Shift4 — 1 operation(s) for risk.
Shift4 Rule API
The Rule API from Shift4 — 1 operation(s) for rule.
Shift4 Tokens API
The Tokens API from Shift4 — 5 operation(s) for tokens.
Shift4 Transactions API
The Transactions API from Shift4 — 8 operation(s) for transactions.
Shift4 Updater API
The Updater API from Shift4 — 2 operation(s) for updater.
Scroll for all 21
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Shift4 Payment API
OPEN COLLECTIONMCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Shift4 MCP Server
MCP SERVEREvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Shift4 Webhooks
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 6
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll for all 8
Build 7
SDKs, sample code, and the tooling you integrate with
Scroll for all 7
Access & Security 3
Authentication, authorization, and security posture
Operate 5
Status, limits, changes, and where to get help
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.