Lilith-zero: Ultra-fast, Rust-based security middleware for MCP
Details
- External ID
- 47659402
- Source
- HN
- Company
- —
- Product
- Lilith-zero: Ultra-fast, Rust-based security middleware for MCP
- Website domain
- github.com
- Launched
- April 6, 2026
- Cohort
- —
- Upvotes
- 9
- Upvotes percentile
- 0.5501285347043702
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
Lilith Zero is a high-performance security runtime designed to mitigate data exfiltration and unauthorized tool invocation in LLM-based agent systems. By interposing at the transport layer, Lilith Zero enforces security invariants through deterministic policy evaluation and strictly framed execution.Lilith Zero is OS, framework, and language agnostic, providing uniform security primitives across diverse implementation environments.
Enrichment
- Theme
- low-level systems and developer tools
- Vertical
- Horizontal
- Function
- Model & infra
- Audience
- Developer
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- rust security middleware for mcp
- Manually corrected
- False
Could you build this?
Partial While wrapping MCP servers with a proxy is straightforward, creating a formal zero-overhead security runtime with deterministic policy enforcement and sandboxing requires deep systems security and Rust runtime expertise.
What it would actually take: A production implementation requires a Rust-based async transport proxy (Tokio) intercepting Model Context Protocol (MCP) JSON-RPC messages via stdin/stdout or SSE. The core challenge is low-latency, deterministic policy validation (using eBPF, WebAssembly sandboxing, or AST-based semantic analysis) to prevent prompt injection and unauthorized API invocation without introducing measurable transport latency. It requires systems programming, secure enclave/sandbox architecture, and formal protocol verification experience.
Discussion
9 comments analyzed.
Competitors mentioned: AgentVeil Protocol (reputation scoring for agents), Linear's GraphQL client (for schema validation), IETF agent discovery drafts (agents.txt, ARDP, AID)
Concerns raised: Agents can be prompt injected to give good scores without completing tasks, Pre-connection trust gap—hardcoded URLs don't scale to dynamic tool discovery, MCP servers listed on directories with basically zero review/vetting, No standard input validation framework for MCP tool calls, Latency overhead could compound in agent swarms with complex policies
Feature requests: Extend scoring to MCP servers and skills, not just agents, Deterministic CI/test-based attestation instead of agent-signed claims, Rate limiting enforcement in MCP middleware, Validate server identity claims (signed manifest) before first tool call, Pre-handshake attestation validation, not just post-connection runtime checks
Competitors
Other products that read as similar to this one — 162 launches clear the similarity bar, closest 8 shown.
Attention rank: #64 of 163 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 148 days after the earliest competitor.
- CambiOS · hn · 2026-06-11 · 8 upvotes · similarity 0.46
- ZeroID · hn · 2026-04-08 · 7 upvotes · similarity 0.43
- MCP-stama · hn · 2026-08-13 · 73 upvotes · similarity 0.43
- lsm-engine · github · 2026-09-12 · 16 upvotes · similarity 0.41
- Nucleus · hn · 2026-06-09 · 40 upvotes · similarity 0.41
- Reminal · hn · 2026-07-01 · 13 upvotes · similarity 0.41
- genpark-diffie-hellman-ratchet-forward-secrecy-skill · github · 2026-09-09 · 8 upvotes · similarity 0.41
- genpark-diffie-hellman-ratchet-forward-secrecy-skill · github · 2026-09-09 · 8 upvotes · similarity 0.41
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a model & infra tool for Fintech yet.