For Claude Code on macOS
See what Claude Code really sends
Claude Proxymate is a real-time proxy with a desktop UI that captures every request between Claude Code and the Anthropic API — decoded, quantified, and explained.
Live capture
Every request. As it happens.
Start the proxy, point Claude Code at it, and watch request–response pairs stream in. Even SSE streams are reconstructed into complete messages in real time.
Mechanism detection
X-ray your prompts
CLAUDE.md injection, rules, memory, slash commands, skills, sub-agents, MCP tools — Proxymate finds the hidden prompt-augmentation machinery inside every request and highlights it.
Request Anatomy & cost
Know where every token goes
A dashboard that quantifies each request: per-segment size estimates, structural facts, cache hit rate, and a cost breakdown based on model pricing.
Privacy first
Safe to share, by default
API keys, tokens, and identifiers are masked on screen — and copy is WYSIWYG, so the clipboard follows exactly what you see. One shortcut (⌘⇧M) flips presenter mode for demos.
And everything around it
Search
Full-text search across requests, responses, messages, and analysis.
Themes
System, light, and dark — tracking your OS.
Two languages
English and Korean, switchable at runtime.
Headless CLI
Run the native proxy standalone — no UI required.
See it in action
A 90-second tour: start the proxy, run Claude Code, and inspect a captured conversation.
Get Claude Proxymate
Free and open-source under the MIT license. Built for macOS.
HomebrewRecommended
brew install --cask kevin-lee/tap/claude-proxymate
Then point Claude Code at it
Start the proxy in the app, then run Claude Code through it:
ANTHROPIC_BASE_URL=http://localhost:9090 claude