Prompt-caching – auto-injects Anthropic cache breakpoints (90% token savings)

prompt-caching.ai

March 13, 2026

1 min read

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46/100

Summary

Open source MCP plugin that automatically injects prompt cache breakpoints into Claude Code sessions. Up to 90% token cost reduction — zero config.

Coverage & discussions

Hacker News · prompt-caching.ai

Historical count: 5 · 5 saved in sample · Historical sample

Analysis ready

Community Sentiment

Mixed

Positives

The auto-caching feature introduced by Anthropic significantly simplifies the process for developers, allowing for efficient breakpoint placement without manual intervention.
Reducing token usage by 90% through prompt-caching can lead to substantial cost savings, making AI applications more accessible for developers.
Claude Code's built-in prompt caching enhances user experience by automatically managing system prompts and conversation history, streamlining development.

Concerns

The plugin discussed is outdated and does not provide any incremental benefits over the existing auto-caching feature from Anthropic, which diminishes its relevance.
Despite initial perceptions, Sonnet is not cheaper than Opus when considering output token costs, highlighting potential marketing discrepancies that can mislead users.