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Understanding MCP

MCP or classic API?

A classic API requires a key, documentation and code. MCP requires one URL and two clicks. Here is how to compare them.

3 min read

Both approaches access the same data. The difference lies in the integration effort and in who uses it: a developer for an API, your AI assistant for MCP.

Classic API◦ Generate an API key◦ Read the documentation◦ Write integration code◦ Maintain it after every changeMCP✓ Paste a URL✓ Authorize in 2 clicks✓ Automatic tool discovery✓ You ask, the AI acts

What MCP adds

  • Automatic discovery: the AI knows which tools are available and how to call them, with no documentation to read.
  • Natural language: you ask for a report, the AI picks the right tool and formats the answer.
  • Built-in authorization: the connection goes through OAuth, not keys to copy around.

When an API is the better choice

If you are building software that calls a service in a scheduled, repeated way, an API remains the right tool. MCP shines when an AI assistant needs to read, cross-reference and act, on a human's request.

MCP or classic API? · Alpative MCP