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The most important thing when building your own MCP (Model Context Protocol)

The most important thing when building your own MCP (Model Context Protocol)

2 October 2025

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Hey there!

Summary of this email:

  • The most important thing when building your own MCP (+ its course 100% published on the Premium plan).
  • The story of Codely.
  • Discounts for Codely's tenth anniversary.

Estimated reading time: 1 minute (this one's a quickie 🙌).


✅ The most important thing when building your own MCP

One of the most important parts of development is testing. If we're building an MCP server, testing is the layer that ensures we don't break anything as we add new features.

All MCP primitives can be tested automatically.

At the end of the day, they're just another entry point to our system, just like an HTTP controller.

We've published a post explaining the best way to test them. And on top of that, we've just published the final part of the course on the Premium plan. 😊


📖 The story of Codely

We're celebrating 10 years at Codely, and to mark the occasion, we're publishing a series of posts telling our story.

So far we've published the first part: Publishing is NOT for scholars.

There are some interesting tidbits about how it all started.


💸 Discounts for Codely's tenth anniversary

To celebrate our tenth anniversary, we've activated two promotions. 😊

  1. 100 € discount on the Premium plan
  2. 100 € discount on the AI for Programming Workshop

Plus, if you're on the Premium plan, you'll get an extra 50 € discount on the Workshop. 🙌


And since you've made it this far in the newsletter, here's the joke of the week, which I know you were waiting for:

> This is a joke about recursion. You can only understand it if you read the joke we sent last Monday. 😂

Cheers!

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