One gateway. Owned and operated by Constellation Payments.

Every way to get paid, through one integration.

CSIPay owns and operates its own gateway, so the product roadmap answers to Constellation operating companies. One integration covers online, in person, mobile, and bank payments across the full lifecycle, from initiation to settlement and reporting.

Online acceptance

Everything connected. One seamless payment.

One pay page brings every online payment method together, so merchants get paid anywhere online.

Pay By Link

No account needed. Share a link and get paid instantly, for one time or recurring collection.

Hosted checkout

Secure, branded, and reliable, with no card data touching partner systems.

E-commerce and recurring

Built for scale, with recurring billing and subscriptions for scheduled charges.

ACH and bank pay

Low fees, direct from bank to bank, for higher ticket and account based workflows.

Digital wallets

Apple Pay and Google Pay are live across card not present transactions, with the framework to add more.

Mobile POS

Turn any phone into a terminal

Application based acceptance, with or without dedicated hardware, so every staff member and every space becomes a checkout.

Tap to pay on phone

Accept contactless cards and digital wallets on the device itself, with no extra hardware.

With or without terminals

One app spans countertop terminals, mobile readers, and phone only acceptance.

Line busting and pay at table

Bring checkout to the customer, in the aisle, on the floor, or at the table.

Field service and delivery

Cellular connected acceptance settles on site, at the door, or on the job.

iOS and Android

EMV, NFC, and QR. Pairs with Axium readers.

Partner portal

One portal. Every merchant.

From onboarding and underwriting through reporting and disputes, manage the entire merchant relationship in one place.

Onboarding and underwriting

Identity validation, risk based underwriting, and faster approvals for most low and medium risk merchants.

Merchant management

User and access controls, with full merchant lifecycle visibility.

Transaction search

Drill down on any transaction, its status, and supporting metadata.

Payout monitoring

Configured schedules, bank transfers, and reconciliation feeds.

Unified reporting

Consolidated card and ACH in one feed, with no multi platform reconciliation.

Disputes

Refunds, chargebacks, and disputes managed end to end with the operations team.

Developer tools

Built for partners. Designed for scale.

Secure, reliable, and developer friendly infrastructure that grows with your business.

REST APIs

REST APIs for processing, onboarding, and reporting.

SDKs

SDKs built for vertical market workflows.

Tokenization

Secure storage and reuse of payment credentials.

Sandbox

A full test environment for development and validation.

Webhooks

Event driven updates for transactions, payouts, and disputes.

Pay By Link

Generate links via API or directly in the portal.

Pricing and surcharging

Pricing that fits the portfolio

Flat or Cost+ pricing

Support flat rate pricing or Cost+, where interchange passes through to merchants with a fixed markup on top, so partners tailor pricing to each portfolio rather than forcing one model on everyone.

Merchant-managed surcharging

A dynamic, merchant friendly way to recover processing costs, applied per transaction or consolidated monthly, built on CSI's established surcharging rules to keep it compliant.

Security and compliance

Security at the core

Every transaction is protected by industry leading standards.

PCI DSS Level 1 Service Provider, v4.0.1

Independently assessed by a QSA, the highest standard in the industry.

End to end encryption and advanced tokenization

Real time fraud detection at every layer

99.9% uptime SLA

Shared responsibility model

CSIPay manages gateway and infrastructure security. Partners and merchants maintain compliance in their own environments.

Coverage

Live today, expanding

United States, live

United States

Card present, card not present, and ACH.

Canada, live

Canada

Card not present through our Canadian processing partner. Card present and EFT coming later this year.

Gateway ownership is the difference. Because CSIPay owns and operates its own gateway, features are prioritized for the verticals Constellation operating companies serve, not for a horizontal platform serving everyone.

Ready to embed payments into
your product?

Speak with a CSIPay specialist and find out how quickly your operating company can go live.