The Shippo card is only listed on the Pro plan or with the Shippo module. Steps:

1. Open the card and paste Shippo Live API Key and/or Shippo Test API Key from your Shippo account.
2. Set Shippo Environment to Sandbox (Test) while testing or Production (Live) to ship for real. In sandbox the card badge reads Sandbox; in live mode with a live key it reads Active.
3. Check the Connection Status section - it performs a live address validation and shows Connected (Test/Live mode) or the error Shippo returned.
4. Under Sender Location, make sure one of your Pickup Points has Primary Shipping Sender Location enabled; otherwise it shows Not Set.
5. Pick a Default Parcel Template from the templates defined in your Shippo dashboard and set Default Meal Weight (lb) (used when no bag is selected; default 0.5).
6. Copy the Webhook URL into Shippo's API settings so tracking updates flow back automatically.
7. Use Run Test Calculation to confirm rates are returned for a sample address.