Hi team, this is my review for eXch, I have been a signature campaign member from the beginning and wanted to share my opinion on your service.

The design of the website is very basic and to the point, I like it how there are less color usage which helps users to focus on the main point which is to exchange crypto automatically.
The best part is that you are providing an API with it and also no Cloudflare so if someone wants to build something on top of it directly, they can surely look into that without getting blocked by the network.
While debugging the website, I see you are getting this issue where when you select BTC for both options, it's shown No pair for this found. That is correct however user shouldn't be able to do this on the first hand and you can use client-side form validation to fix this issue, it will surely improve the Quality of life and experience of the users.

Everything else is to the point and looks great, cheers!