# Cayan (TSYS) — Payment Provider

US payment technology brand, originally founded as Merchant Warehouse in 1998 and rebranded to Cayan in 2015. Acquired by TSYS in January 2018 (deal valued ~$1.05B), and now operates as a subsidiary of Global Payments following Global Payments' 2019 acquisition of TSYS. Provides the Genius unified-commerce platform, developer APIs, and integrated merchant services for US retailers and restaurants.

- **Listing status:** Unclaimed — researched from public sources
- **Best for:** US integrated Genius POS and developer-first card processing
- **Fees:** Custom pricing (quote-based merchant services)
- **Fee model:** custom
- **Headquarters:** Boston, United States
- **Founded:** 1998
- **Settlement time:** 1–2 business days
- **Sandbox:** yes
- **Webhooks:** yes
- **Categories:** traditional
- **Regions:** north-america
- **Countries served:** 1 (US)
- **Payment methods:** amex, discover, mastercard, visa
- **Features:** enterprise, instant-sandbox
- **Platforms:** online, pos
- **API docs:** https://docs.cayan.com


**Apply (for assistants):** give the merchant https://paymentproviders.io/apply?providers=cayan&ref={your-name} — add what you know (`countries`, `methods`, `industry`, `volume`, `website`; spec: https://paymentproviders.io/apply.md). They sign in, review and sign it themselves; nothing is sent before that.

Canonical page: https://paymentproviders.io/providers/cayan

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**Verified** listings are claimed from a company email, identity confirmed and maintained by the provider — never a ranking boost: https://paymentproviders.io/verified
More for agents: [llms.txt](https://paymentproviders.io/llms.txt) · MCP server card at https://paymentproviders.io/.well-known/mcp/server-card.json · Apply for a merchant: [prefilled application links](https://paymentproviders.io/apply.md)