# Shift4

**Canonical:** https://apis.io/providers/shift4/  
**Website:** https://www.shift4.com  
**APIs profiled:** 11

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.

## Kin Score — 50.8 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 50.8).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 72.0 |
| Governance | 20.8 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 77.7 |
| Commercial Clarity | 7.9 |

Regulatory layer — **Payments**: 34.4 (matched via tags).

## Agent readiness — 58.8 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | documented |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (11)

- **Shift4 Transactions API** — Core card payment processing for the Shift4 Payment API — authorize, capture, sale, refund, and manage card transactions, including card entry, processing mode, dynamic currency...
- **Shift4 Tokens API** — Tokenization endpoints for the Shift4 Payment API — create, retrieve, and manage card tokens (single-use and card-on-file) plus the account updater for keeping stored credential...
- **Shift4 Gift Cards API** — Gift card issuance and redemption for the Shift4 Payment API — activate, add value, redeem, balance-inquire, and manage stored-value gift card accounts.
- **Shift4 Devices API** — In-person and terminal control for the Shift4 Payment API — drive card-present devices, EMV/contactless acceptance, and the Commerce Engine for attended and unattended payment h...
- **Shift4 ACH API** — ACH bank-account payment endpoints for the Shift4 Payment API — create and manage ACH debit/credit transactions, backed by ACH webhook notifications for asynchronous status upda...
- **Shift4 Alternative & QR Payments API** — Alternative payment methods for the Shift4 Payment API — QR-code payments (including Citcon, WeChat Pay, and Alipay) and PayPal acceptance.
- **Shift4 3D Secure & Risk API** — Cardholder authentication and fraud controls for the Shift4 Payment API — 3D Secure (3DS) authentication flows plus risk scoring and rule evaluation.
- **Shift4 Payment Links API** — Hosted payment link endpoints for the Shift4 Payment API — create, configure, share, and reconcile shareable payment links, with payment-link webhook notifications.
- **Shift4 Checkout Sessions API** — Hosted checkout session endpoints for the Shift4 Payment API — create and retrieve checkout sessions for online payment collection, with checkout-session webhook notifications.
- **Shift4 OCT Payouts API** — Original Credit Transaction (OCT) endpoints for the Shift4 Payment API — push funds to cardholders for payouts and disbursements.
- **Shift4 Reports & Merchants API** — Reporting and account endpoints for the Shift4 Payment API — transaction reports plus merchant and credentials lookups.

## MCP servers (1)

- **shift4-mcp.yml**

## Agentic access (1)

- **Shift4 Agentic Access** — 72 operations · 63 acting · 1 human-in-the-loop

## Security (2)

- **Shift4 Authentication** — apiKey/http · 2 schemes
- **Shift4 Domain Security** — TLSv1.3 · DMARC

## Tags

Payments, United States, Payment Processing, Payment Gateway, Acquiring, Payment Terminal, Tokenization, ACH, 3D Secure, Gift Cards, Payment Links, Card Present

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/shift4/). Scores are computed from the provider's own public artifacts under a published rubric.