How do I set the Dexcom redirect URL and region?

For a custom-subdomain Dexcom setup, the redirect URL must point at the subdomain whose CNAME points to our load balancer, not at your apex domain.

For a custom-subdomain Dexcom setup, the redirect URL must point at the subdomain whose CNAME points to our load balancer, not at your apex domain. If it points at the apex, the auth callback never reaches us.

Update the redirect URL in both places so they match exactly:

1

Your Terra dashboard, under Connections > Dexcom.

2

Dexcom's developer portal.

Confirm the region too: users outside the US must use the EU server variant (DEXCOM_EU) with credentials enabled by Dexcom for the EU API host. See the Dexcom integration docs for the full setup.