Conduct, open-source guardrails for LLM and MCP tool calls
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HN · launched Aug 28, 2026 · 22 upvotes (top 24%) · 0 views
Niche: llm security and guardrails software · 58 launches, 5 in the last 7 days ▼ -44% · Explore this niche →
Category and tags
- Horizontal
- Compliance & governance
- Developer
- AI-native
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 58 launches in llm security and guardrails software →
Could you build this?
Yes It is an open-source proxy/interceptor middleware that validates JSON tool call schemas and MCP requests against configured safety rules.
Discussion
4 comments analyzed.
Competitors mentioned: agentjail (OPA-backed policy guardrails with sandbox), coding-tools crate (lighter harness for tool calls)
Concerns raised: Agents leaking credentials to LLM providers, Prompt injection attacks, Out-of-policy tool calls reaching providers
Competitors
Other products that read as similar to this one : 1049 launches clear the similarity bar, closest 8 shown.
Attention rank: #216 of 1050 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 302 days after the earliest competitor.
- jev-llm-guard · github · 2026-09-30 · 11 upvotes · similarity 0.69
- Otari: your open-source LLM control plane · hn · 2026-07-06 · 20 upvotes · similarity 0.61
- Sentrint, a security scanner for projects build with LLMs · hn · 2026-08-20 · 6 upvotes · similarity 0.59
- dev-quality-gates · github · 2026-10-23 · 131 upvotes · similarity 0.55
- I made a guardrail against AI outreach slop (API/MCP) · hn · 2026-11-07 · 5 upvotes · similarity 0.53
- open-guardrail · github · 2026-11-04 · 30 upvotes · similarity 0.52
- OpenProgram · github · 2026-11-06 · 42 upvotes · similarity 0.51
- Sub-Agent MCP: LLM delegation and sub-agent orchestration via MCP · hn · 2026-06-06 · 6 upvotes · similarity 0.49
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.