Everything you need to onboard and grow with CSIPay.

A single hub for Constellation Software partners: partner kits, API docs, co-marketing templates, and onboarding resources, all in one place.

Browse resources

Partner launch kit

Value Proposition

Transition FAQ

Co-Marketing Templates

Payrix to CSIPay

New merchant boarding moves to CSIPay on July 1, 2026.

The last day for Payrix boarding is June 30, 2026. From July 1, all new merchants are boarded through CSIPay. Read the full FAQ for what changes, timing, and what your team needs to do.

Read the Transition FAQ →

Partner resources

Your full enablement library.

Everything you need to introduce, position, and grow with CSIPay, ready to use with your customers and stakeholders.

Value Proposition

A concise summary of who CSIPay is for, the core problem it solves, and the differentiated value of the Constellation partnership.

Enablement Playbook

Your go-to guide for customer conversations, covering FAQs, onboarding steps, and objection handling in one resource.

Co-Marketing Templates

Need co-branded marketing materials for your campaigns? Reach out to our marketing team to request customized templates tailored to your needs.

Technical resources

Built for fast integration.

Everything your technical team needs to evaluate, prototype, and go live, from sandbox to production.

Demo Request

Request a live walkthrough of CSIPay. Our team will tailor the demo to your vertical and integration scenario.

Sandbox & Test Account

Access test credentials and a fully functional sandbox environment to validate your integration before going live.

API Documentation

Clean, public-facing API docs covering authentication, endpoints, webhooks, and error handling, with code samples.

Implementation Guide

Step-by-step integration guide covering timeline, resourcing requirements, technical milestones, and your go-live checklist.

Technical Architecture Overview

Data flow diagrams, component maps, and system integration architecture for your technical stakeholders and IT teams.