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The Sixth Shim: When MCP Becomes a Middleware Factory
Episode 4522
Published 1 week, 6 days ago
Description
You started with one quick wrapper. Then another. Now you're running six bespoke shims between your MCP gateway and your servers, and nobody can explain the system without a whiteboard. This episode builds a taxonomy of shim patterns — transport translation, credential injection, tool filtering, schema coercion — and ruthlessly sorts which problems are generalizable infrastructure and which are server-specific one-offs that belong upstream. We name the real prior art, weigh the blast radius tradeoffs of consolidation versus independence, and give you a decision rule that prevents the seventh shim from ever being written.