Developer Tools icon Welcome to Nexio's Developer Tools documentation section. This section contains information for the developer who is creating an integration to a merchant site with the Nexio APIs.

Handling errors and declines

Get information about how to plan for and recover from errors and declines.

Learn more →

Webhooks

Configure Webhooks so you can receive asynchronous responses.

Learn more →

Iframe

Learn about the options for working with and customizing the Nexio iframe.

Learn more →

FAQs

Have more questions? Check out the FAQs for some answers.

Learn more →

Other developer tools

Finding a transaction
Filtering using query parameters
Requesting additional response parameters
Glossary