New Payment Gateway integration process to Shopify

Technical Q&A

Topic summary

Main issue: Integrating a USSD-only (Unstructured Supplementary Service Data) mobile payment gateway into Shopify for use in Angola.

What was asked:

  • Whether Shopify supports USSD-based payments as a gateway option.
  • Documentation to guide developers.
  • How many APIs are needed from the payment gateway to connect with Shopify.

Latest guidance provided:

  • Use Shopify’s “Extensions for payments” to build a third‑party custom payment app.
  • The flow should redirect customers from Shopify checkout to the external payment system where the transaction is processed.
  • A developer documentation link was shared for implementation details.

Open points/Unanswered:

  • No explicit confirmation that USSD is supported by Shopify beyond the custom app/redirect approach.
  • No specific answer on the number of APIs required; this remains unspecified and likely depends on the gateway’s capabilities and the payment app design.

Status: Ongoing; awaiting clarification on USSD compatibility specifics and API requirements.

Summarized with AI on December 21. AI used: gpt-5.
1

Hello Team, I have a payment gateway which supports only USSD method of mobile payments. I want to know if I can integrate this with Shopify as one of the payment gateway for users to use in Angola market.

Will Shopify support this technology? If so can you share any documentation that will be helpful for our developers.

Also may I know the number of API’s required from payment gateway for connecting with shopify.

2

Hi there, @Mohan1 .

Welcome to the Shopify Community, and thanks for posting your question.

If you’re looking to integrate a third party custom payment app into Shopify, I recommend reviewing our developer documentation: Extensions for payments. To do this, you’ll need to develop a Shopify app that redirects users to your external payment system where the transaction is processed.