Explore FlexPay's extensive list of supported payment gateways, complete with integration details, supported operations, and customization options.
FlexPay integrates with a wide range of payment gateways to support your business needs. Below, you'll find a detailed list of all currently compatible gateways. We are constantly expanding our network, and if your preferred gateway is not listed, please contact us to initiate the integration process.
For each gateway, the page provides key information, including:
- Production and Sandbox Endpoints: Connection URLs for live and testing environments.
- Supported Operations and Payment Types: Details about the transactions and methods available.
- Gateway-Specific Fields (GSF): Unique optional fields required by certain gateways for customized options. To include a GSF in a request, nest it under
gateway_specific_fieldsand specify the gateway’s name (e.g., gateway_type). - Gateway-Specific Response Fields (GSRF): Non-standard response fields returned by some gateways, found under the
gateway_specific_response_fieldsobject.
If additional fields are required for your integration (either to send or receive data), please reach out to your Customer Success Manager (CSM) or Integration Manager to submit a request.
Our goal is to make integrating with FlexPay as seamless as possible. If you have questions about a specific gateway or require support for a new integration, don't hesitate to get in touch.
Sandbox Testing
While FlexPay supports a broad range of payment gateways, only select gateways are enabled for end-to-end testing through FlexPay's API. These sandbox endpoints allow you to simulate real-world transactions in a controlled environment without affecting your live accounts. Transactions in sandbox mode are sent from FlexPay to the gateway's sandbox endpoint for testing purposes.
To facilitate testing, many gateways provide test cards, specific transaction amounts, or response codes. These tools help you trigger various outcomes and ensure a successful integration. For gateway-specific testing instructions, consult their official documentation.
The list below includes all gateways currently supported by FlexPay. For each gateway, check the Sandbox API endpoint—if a URL is provided, sandbox testing is available.
All commands listed in the "Gateway Management" section of this API document can be used to create a gateway in both sandbox and production modes. The mode is determined by the API key used in the request. If a Sandbox API Key is used, the gateway will be created in sandbox mode. Similarly, using a Production API Key will create the gateway in production mode.
Important
Once a gateway's mode is set, it cannot be changed. If the gateway was added in the incorrect mode, it must be disabled, and a new gateway must be created.
For more comprehensive guidance on sandbox testing, refer to our Sandbox guide.