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API integration | Any provider

Custom payment gateway integration by API

For platforms, portals and software that need more than a plugin. We build the integration against your provider's API, handle webhooks, refunds and disputes, and reconcile every payment back to your system.

  • Hosted, embedded or fully custom payment pages
  • Webhooks, refunds and disputes handled in code
  • Payments reconciled to your orders or accounts

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Quick answer

What is a custom payment gateway integration?

A custom payment gateway integration connects your platform directly to a provider's API instead of using a plugin. It covers taking payments, verifying webhooks, refunds, disputes and reconciling every payment to your records, with card data kept at the provider through tokens. eCom Pro scopes and builds it for any provider.

Custom payment gateway integration by API
API buildsWebhooks handledReconciled

Payments working, but nobody trusts the numbers?

A payment that succeeds at the provider but never updates your system is worse than a decline. Missed webhooks, duplicate charges and refunds done by hand are what turn a working integration into a daily headache.

  • Idempotent payment requests, no double charges
  • Webhooks verified, retried and logged
  • Daily reconciliation against provider reports
Scope your integration
Custom payment gateway integration by API

What a custom integration includes

Built and documented so your team can run it.

Payment pages

Hosted, embedded fields or a fully custom page, depending on how much you want to own.

Security and PCI scope

Card data kept with the provider through tokens, so your systems stay out of card handling.

Webhooks

Every payment event verified, retried on failure and logged.

Refunds and disputes

Refunds from your admin and dispute evidence collected automatically.

Reconciliation

Payments matched to orders, invoices or accounts, with exceptions flagged.

Documentation

A written handover so your team knows how it works and what to watch.

How a custom integration works

01

Discovery call

We go through your system, your provider and what has to happen when money moves.

02

Written scope and fixed quote

Endpoints, events, edge cases and one price.

03

Build in sandbox

Built and tested against the provider's test environment, including failure cases.

04

Live and monitored

Switched on with monitoring, then handed over with documentation.

Custom payment gateway integration by API

Built by the team behind 200+ websites

eCom Pro has built websites and checkouts since 2007. We integrate the payment provider you already use, or help you choose one. For specialist sectors we usually recommend eCom Pay.

5.0 from 39 Google reviews

Sharfin designed and built our new website to enable us to accept online payments. The new website looks amazing and navigating around it so simple compared to what we had before. Sharfin and his team have always been available when we have required any technical support or assistance.

Chris StandenJust Vape and Juices Limited

Done all our website. It now accepts payments and it was very complex. Reachable at all sorts of odd hours, and had a very simple journey with sharfin. Highly recommend them and their expertise.

Prestige KeysChauffeur and car hire, Luton

Sharfin was an absolute pro. Took time to really try to understand our needs and propose solutions which fit our budget and timescales. He made smart suggestions without being pushy but improving the plan so we didn't waste time or resources on things we don't need.

Mohammed YasirGoogle review
Google reviews Trustpilot reviews

Everything we offer is run by the team that built your website and connected your payments, so there is one number to call and one bill. We have worked this way since 2007.

Sharfin KhanFounder of eCom Pro and High Risk Payment Gateway Specialist at eCom Pay

Custom payment gateway integration questions

What is a custom payment gateway integration?

Connecting your website, platform or software directly to a payment provider's API, rather than using an off the shelf plugin. It covers taking the payment, handling webhooks, refunds and disputes, and matching every payment back to your records.

Which providers do you integrate by API?

eCom Pay, Stripe, PayPal, Worldpay, Square, Adyen, Checkout.com, Opayo and most providers with a published API.

Will we need to be PCI compliant?

Card details stay with the provider through hosted fields or tokens, which keeps your own systems out of card handling. We explain exactly what that means for your PCI questionnaire during scoping.

Do you support the integration after launch?

Yes. We monitor it after go live and can stay on to support it, or hand over to your team with full documentation.

Scope your payment integration

A discovery call, a written scope and one fixed price before any build starts.

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