Can You Build Your Own MCP Wrapper With an Existing API?

Gundel_Gaukelei · reddit · 2026-07-16

The post asks: If you already have an existing API, can you just build an MCP yourself?

The author's logic is that if a company has usable internal APIs, even without an official MCP release, they can use FastMCP to wrap a local MCP server and let locally deployed LLM tools call it. He also mentioned testing this with various models, and almost all could successfully call the API through this MCP. The core question is to confirm whether anything is missing in this understanding.

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