I have used Chase. Do you have an account with Chase? They will only do it for customers.
Answers

They have to check internally on who has the authority, and sometime have to send over the "stamp" to be used .... so it can be difficult. I think many brokerage houses have it for customers as well.


I just googled for you, and here is a list of major banks offering it for you -- Well is on it, but it specifies only at certain locations (I have been telling everyone since the late 1990s to never do any business with Wells). It says the is even a way to get it online,alhtohg I dont see how if for no other reason than they can't stamp your document:
https://esignatureguarantee.com/faq/where-to-get-a-medallion-signature-guarantee
There are many more, but try googling. I see even FedEx Employees Credit Union offers it, or other credit unioins, or a broker or other financial firm:
https://fecca.com/invest-medallion-signature-guarantee/
OK here you go, a searchable Web page to find Medalion signature guaranttee via state, city and ZIP code:
http://www.msglookup.com/search.html

But down for everyone says its just me


Good thing I have no need for one

The directory is not complete as the big community bank where I got my form stamped with medallion, is not included. I tested search tool, using both participant name and zip codes where bank has locations, all yielded nothing.



And I would imagine Schwab









https://www.depositaccounts.com/community/misc/7400-medallion-stamps.html



