A MitM proxy to see what your LLM tools are sending
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I built this out of curiosity about what Claude Code was actually sending to the API. Turns out, watching your tokens tick up in real-time is oddly satisfying.Sherlock sits between your LLM tools and the API, showing you every request with a live dashboard, and auto-saved copies of every prompt as markdown and json.
HN · launched Jan 28, 2026 · 218 upvotes (top 3%) · 1 view
Niche: ai api gateways and proxies · 336 launches, 7 in the last 7 days ▼ -46% · Explore this niche →
Category and tags
- Horizontal
- Observability & eval
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 336 launches in ai api gateways and proxies →
Could you build this?
Yes A local HTTP/HTTPS MitM proxy (using standard libraries like mitmproxy or Node's http-proxy) that parses incoming LLM API requests and streams token/prompt data to a local web dashboard can be vibe-coded within days.
Discussion
20 comments analyzed.
Competitors mentioned: litellm with langfuse, mitmproxy, transparent bridge packet inspection, wiretaps
Concerns raised: Supply chain vulnerabilities in dependencies, TLS verification bypass security implications, Intercepting cleartext data is non-trivial, Code generated by LLMs without proper understanding, Cat and mouse arms race with detection avoidance
Feature requests: Support for multiple DNS sources (ISP resolver, public library WiFi, etc.), Better integration with tool call results and timing information, No MitM requirement - proxy via API base address configuration
Competitors
Other products that read as similar to this one : 148 launches clear the similarity bar, closest 8 shown.
Attention rank: #18 of 149 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 88 days after the earliest competitor.
- shim-cli · ph · 2026-10-18 · 191 upvotes · similarity 0.47
- Agent-of-empires: opencode & claudecode session manager · hn · 2026-01-10 · 8 upvotes · similarity 0.45
- Latitude for Claude Code · ph · 2026-05-13 · 368 upvotes · similarity 0.43
- Vesalius · ph · 2026-10-26 · 8 upvotes · similarity 0.43
- Hallmonitor · ph · 2026-10-08 · 66 upvotes · similarity 0.42
- TokenTrust · ph · 2026-11-09 · 1 upvotes · similarity 0.41
- Meter Gateway · ph · 2026-10-14 · 2 upvotes · similarity 0.40
- Claudebin · hn · 2026-02-19 · 30 upvotes · similarity 0.39
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.