How do I calculate the monetary value of my cache hits?

You can use the `analyze_cache_performance` tool. By providing the `costPerToken` parameter, the tool calculates the total `cacheHitValue` based on the tokens saved during successful hits.

What determines the optimal cache size?

The `evaluate_cache_optimization` tool determines the optimal cache size by calculating the 95th percentile of prefix lengths from your request logs.

How can I see if my cache is evicting too many items?

Use the `inspect_cache_dynamics` tool. It provides the `cacheEvictionRate`, which is the number of evictions divided by the total cache capacity.

Prompt Cache Hit Calculator MCP Connector for Claude

A+

Analyze prompt prefix caching performance, efficiency, and cost savings.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides deterministic analysis of prompt prefix caching strategies. It allows AI agents to evaluate how effectively cached prefixes are being utilized to reduce latency and costs. Use analyze_cache_performance to calculate hit rates and monetary savings, evaluate_cache_optimization to determine the ideal cache size based on prefix sharing, and inspect_cache_dynamics to monitor eviction rates and specific prefix match lengths.

cachingtokenscost-analysisprompt-engineeringperformance

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_RtPMDdAVBYJh5FuqI4pTMxgwoz4sOxqI1BctS0MI/mcp

② Claude Code (terminal)

claude mcp add --transport http prompt-cache-hit-calculator https://edge.vinkius.com/vk_preview_RtPMDdAVBYJh5FuqI4pTMxgwoz4sOxqI1BctS0MI/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "prompt-cache-hit-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_RtPMDdAVBYJh5FuqI4pTMxgwoz4sOxqI1BctS0MI/mcp"
    }
  }
}

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