NMI Integration for Gravity Forms Setup Testing and Purchase Guide

Introduction

Table of Contents

Introduction
1. Pre-purchase credential checklist
2. Purchase
3. Configure payment feed
4. Sandbox test matrix
5. Go-live
6. When to escalate
7. Common NMI + Gravity Forms mistakes
8. First 48 hours after go-live
9. Staging sign-off before production keys
FAQ
Related reading

This is the transactional path for PatSaTECH’s NMI integration on Gravity Forms. Commercial rationale: why buy NMI for Gravity Forms. Evaluation: how to evaluate payment gateway plugins.

ISO partners: deliver this checklist to client dev teams with test credentials—most delays are missing webhook URLs, not plugin bugs. Purchase Network Merchants Inc. for Gravity Forms before billable staging work so license renewals stay centralized.

1. Pre-purchase credential checklist

Item	Owner
NMI API username / password or security keys	ISO / NMI portal
Test vs production environment	ISO docs
Webhook signing secret (if used)	NMI settings
Allowed IP or URL restrictions	Hosting

If credentials are missing, contact your ISO before buying the plugin.

2. Purchase

Network Merchants Inc. for Gravity Forms → checkout.
Save license for updates—buying a payment gateway plugin explains renewal risk.
Install on staging.
Add plugin installation support for ISO-mandated launch dates.

3. Configure payment feed

Activate plugin; enter test credentials in Gravity Forms settings.
Form → NMI feed: map amount, invoice/description fields, confirmation pages.
Configure webhook URL in NMI if async settlement applies—webhooks primer.
Enforce HTTPS sitewide on payment paths.

Integration style background: hosted vs integrated gateways.

4. Sandbox test matrix

Test	Pass criteria
Approved sale	Entry Paid; NMI transaction ID logged
Declined	Failed entry state
AVS/CVV mismatch (if enabled)	Matches your risk policy
Customer abandons	No false paid without callback
Partial refund	Document finance SOP

Follow how to test your payment gateway like a pro. Log IDs only—PCI-safe logging.

Recurring stacks: extend tests per Gravity Forms recurring payments.

5. Go-live

Replace with production credentials.
Update live webhook endpoints.
Run minimal live transaction; verify descriptor and settlement.
Monitor 48 hours—webhook monitoring habits apply to GF entries.

Other gateways: Gravity Forms category hub.

6. When to escalate

ISO-mandated PA-DSS forms, multi-MID routing, or CRM hooks on payment → get a quote or custom integration.

7. Common NMI + Gravity Forms mistakes

Mistake	Impact
Production keys on staging	Unintended live charges
AVS/CVV rules untested	Surprise declines at launch
Ignoring webhooks	Entries stuck pending
Caching return URLs	False success messages
No renewal budget	Stuck on old plugin during NMI API change

8. First 48 hours after go-live

Monitor authorization rate, pending entries, and duplicate submissions on multi-page forms. Align support macros with chargebacks vs refunds so agents do not confuse processor declines with integration bugs.

Purchase link: Network Merchants Inc. for Gravity Forms.

9. Staging sign-off before production keys

Document: sandbox matrix owner, date, ISO ticket number if applicable, AVS/CVV policy confirmed, webhook URL registered, and support macro for “paid in NMI / pending in GF.” Finance must sign refund SOP. Only then promote production credentials—this single gate prevents most launch-week fires.

If your ISO supplies a test card list, attach results to the sign-off PDF so audit trails survive staff turnover.