> ## Documentation Index
> Fetch the complete documentation index at: https://docs.knotapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# I2C

> Use Knot's direct integration with I2C to securely retrieve and send card information without backend requests.

## Overview

Knot has a direct integration with I2C to retrieve end user card information directly on your behalf. This integration can be used to securely send card information to Knot without your backend needing to make any requests.

If you do not already have access to end user card information, you can take advantage of the direct Knot and I2C integration to simplify your integration with Knot's CardSwitcher product.