Ruby has an excellent ecosystem for building clients, with tools like `net/http` and `rest-client`. What kind of Ruby client are you testing? Is it:

1. A REST API client?
2. A WebSockets client?
3. Something else?

Please share more details about your project, and I'll do my best to assist you.

If you're building a REST API client, here's some general guidance on getting started with `rest-client` or `net/http`:

**Using rest-client**

1. Add the `rest-client` gem to your project: `gem 'rest-client', '~> 2.6'`
2. Create an instance of the `RestClient` class
3. Use methods like `get`, `post`, `put`, and `delete` to make requests

**Using net/http**

1. Add the `net/http` library (built-in with Ruby) to your project: `require 'net/http'`
2. Create an instance of the `Net::HTTP` class
3. Use methods like `get`, `post`, `put`, and `delete` to make requests

Which one are you leaning towards? Or do you have a different approach in mind?