Provided by Teslemetry.com

Fleet Key

Host your Tesla Fleet API public key for the Home Assistant Tesla Fleet integration.
Home Assistant DocumentationTesla Fleet API Documentation

Your unique domain is 6lrsi.fleetkey.cc

Developer Application

Create a Tesla Fleet application and set its origin to https://fleetkey.cc, and redirect to https://my.home-assistant.io/redirect/oauth.
Create Fleet API application

If you are unable to set the origin domain to fleetkey.cc

Register with any other valid domain then edit it in the Tesla Developer portal.

Setup integration in Home Assistant

Now you're ready to add the integration and authorise your account with OAuth. Come back here when prompted to host the public key.
Add integrationt to Home Assistant

Host Public Key

Copy and paste the public key from Home Assistant and then click Create.

Finish setup in Home Assistant

Home Assistant will now try and register the domain with Tesla. If it doesn't work immediately, try again in a minute.

Add Virtual key to vehicles

If you missed the QR code to install the virtual key from Home Assistant, here it is again. Scan or tap the QR code with your Smartphone.

Is this too hard or confusing?

Teslemetry is the easy way to get real-time data into Home Assistant. Click here to check it out.