I's ridiculous to me that both Mint (RIP) and [removed] support Arvest Mortgage and Quicken Simplify still hasn't added this despite requesting it for 2 years.
https://mymortgage.arvest.com/
Note this URL. A previous "answer" to this question said use https://arvest.com which is falsely labeled "Arvest Central Mortgage" on Quicken but this is an entirely different website and mortgages are not accessible from the URL Quicken offers.
I should not have to manually track a mortgage when Mint and [removed] can do this automatically. Please fix ASAP.