Ask HN: Which apps do you use to play with MCP servers?

As MCP servers have been gaining popularity recently, I believe many of you have been trying them out. I'm curious to know which apps you use to work with MCP. The standard approach is to use the Claude desktop app, but what if you want to use models from other providers? There are many popular open-source chat apps that support BYOK, but only some of them support MCP. More importantly, MCP support involves more than just connecting to MCP servers, it requires the implementation of an agent, which means different apps can yield varying results and performance. Please share your experiences with using MCP in chatbot apps, and how well they have worked for you.