SentinelAgent Guard
Firewall for MCP servers and AI agents
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Guard sits in front of your MCP server and runs 22 deterministic checks across five layers on every call. It blocks tool poisoning, rug pulls (CVE-2025-54136), and hidden Unicode payloads in tool descriptions before they land. No AI model does the checking — same verdict every time, no token bill. Point your agent at Guard instead of building this yourself. Three ways to run the same engine: hosted gateway, embedded SDK, or sidecar CLI for Cursor / Claude Code / Copilot stdio servers.
PH · launched Sep 23, 2026 · 2 upvotes (top 26%) · 1 view
Niche: ai agent guardrail software · 201 launches, 25 in the last 7 days ▲ +25% · Explore this niche →
Category and tags
- Security
- Compliance & governance
- Developer
- AI-native
- Commercial product
- Developer Tools
- Artificial Intelligence
- GitHub
- Security
Visit website ↗ Source listing ↗
More like this: all 201 launches in ai agent guardrail software →
Could you build this?
Yes It acts as a deterministic JSON-RPC middleware proxy that inspects incoming Model Context Protocol requests and applies standard regex, Unicode normalization/sanitization, and schema validation rules.
Competitors
Other products that read as similar to this one : 747 launches clear the similarity bar, closest 8 shown.
Attention rank: #226 of 748 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 315 days after the earliest competitor.
- Guard Starter · ph · 2026-09-25 · 1 upvotes · similarity 0.63
- Foo Guard · ph · 2026-09-29 · 1 upvotes · similarity 0.59
- GuardAgent · ph · 2026-09-21 · 2 upvotes · similarity 0.58
- yolonot · ph · 2026-11-11 · 2 upvotes · similarity 0.55
- GuardiAgent · hn · 2025-11-21 · 9 upvotes · similarity 0.54
- Armour · hn · 2026-01-20 · 23 upvotes · similarity 0.53
- agentsentinel · ph · 2026-11-03 · 1 upvotes · similarity 0.52
- agent-harness · ph · 2026-09-10 · 3 upvotes · similarity 0.51
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.