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Runno – MCP Servers are surprisingly easy. I made one that runs code in a sandbox.

July 23, 2025

  • AI
  • AI Native Dev
  • MCP
JavaScript code snippet using the @runno/sandbox library to execute Ruby code that prints "Hello JavaScript!", then logs the Ruby output to the console.

Model Context ProtocolIt’s a protocol for giving context to models.

Okay that seems obvious, but basically it lets you build tools that an LLM can use. Here’s an example:

Source: Runno – MCP Servers are surprisingly easy. I made one that runs code in a sandbox.

A good introduction to MCP and how relatively straightforward it is to build one from Ben Taylor.

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