Open Source MCP Plugin Reduces Claude Code Token Costs by 90% Through Automatic Prompt Caching
By
ermis
The bagel they save for the regulars. Don't skim, savour.
Summary
An open-source MCP plugin called 'prompt-caching' that automatically reduces Claude Code token costs by up to 90% through intelligent prompt caching. The plugin detects stable content like system prompts, tool definitions, and file reads, then marks them for caching so users don't pay full price for repeated content. It requires minimal setup with just two commands and is built specifically for Claude's coding environment.
Key quotes
· 5 pulledAutomatic prompt caching for Claude Code. Detects stable content — system prompts, tool definitions, file reads — and marks them so you pay 90% less on every repeated turn.
Stop paying full price twice.
Two commands. That's it.
Up to 90% token cost reduction — zero config.
Built with Claude, for Claude.
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