The Solarwinds needs to query the base URI https://api.meraki.com/api/v0 using the API key. To find the device status of the devices in the organisation run the following API https://documenter.getpostman.com/view/7928889/SVmsVg6K?version=latest#abfe5e96-34e9-4ae9-ae42-ffada...
Did you see the organization listed with the name after filling in the API key in Solarwinds which was obtained from the Meraki dashboard? If not, you might want to test the API key and make sure it's correct/working using 'Postman' or other third party software and then open a case with Solarwinds to investigate why it doesn't show device statuses from the organisations.
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