Where can I find an CRC API example for the MAX32625/26?

The examples are downloaded using the ARMCortexToolchain installer.  You can easily choose to download only the product specific resources/firmware.  Once you finish the installation, look in the installation location you specified.  The folder named "Firmware" contains the SDK API and examples.  So for the MAX32626/26, the CRC example is located in <install dir>\Firmware\MAX32625\Applications\EvKitExamples\CRC\.