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mcpfusion
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mcpfusion

Active·★ 255·Apache-2.0·Updated 2026-09-20

MCP Fusion is a TypeScript framework for building secure MCP servers with architectural security enforcement. It includes egress firewall, state machines, governance tools, and AI-assisted development via a machine-readable Skill contract. The framework supports three pathways: zero-code YAML, typed MVA, and FSM-based workflow enforcement, and can be deployed to Vinkius Edge, Vercel, or Cloudflare Workers.

mcpfusion sits in the Dev Tooling category, so it is usually better judged by workflow fit, deployment style, and team needs than by isolated features alone. Based on the available metadata, it leans most clearly toward Egress Firewall (Presenter) - Validates responses via Zod schema and redacts PII before sending to LLM.. A representative use case is Build secure MCP servers for sensitive data, e.g., patient records with PII redaction and workflow gating.. The listed license is Apache-2.0. GitHub stars are currently 255. Relevant tags include mcp, mcp-framework.

This write-up is based on the project's README and public repository data. We have not hand-tested the tool.

#mcp#mcp-framework#mcp-server#mcp-servers#model-context-protocol
$ Install
$ npx @mcpfusion/core create my-server && cd my-server && npm install
↗ Visit site★ GitHub
01

Features

01Egress Firewall (Presenter) - Validates responses via Zod schema and redacts PII before sending to LLM.
02State Gate (FSM) - Removes tools from agent's namespace based on workflow state using XState v5.
03Governance Stack - Eight modules for behavioral auditing, including contract hashing, lockfile, and drift detection.
04Sandbox Engine - Executes LLM-provided JavaScript in a sealed V8 isolate with memory and timeout limits.
05AI-Assisted Development - SKILL.md encodes security patterns; AI agents automatically produce compliant servers.
02

Why choose it

+Egress Firewall (Presenter) - Validates responses via Zod schema and redacts PII before sending to LLM.
+State Gate (FSM) - Removes tools from agent's namespace based on workflow state using XState v5.
+Build secure MCP servers for sensitive data, e.g., patient records with PII redaction and workflow gating.
+Supports 3 platforms or runtime environments.
03

Trade-offs

!The final decision should still be made through side-by-side comparison with similar tools.
04

Compatibility

Vinkius Edge
Vinkius Edge
Verified via docs
Vercel
Vercel Functions
Verified via docs
Cloudflare Workers
Cloudflare Workers
Verified via docs
05

Quick start

1
$ npx @mcpfusion/core create my-server
2
$ cd my-server
3
$ npm install
06

Use cases

↳Build secure MCP servers for sensitive data, e.g., patient records with PII redaction and workflow gating.
↳Rapidly create MCP tools from YAML definitions without writing TypeScript code.
↳Deploy governed MCP servers to production infrastructure with built-in DLP and audit trails.
07

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On this page
01Features02Why choose it03Trade-offs04Compatibility05Quick start06Use cases07Alternatives
vinkius-labs /
mcpfusion
↗

MCP Fusion - The TypeScript framework for secure MCP servers.

255Apache-2.0
Last commit1mo ago
StatusActive
CategoryDev Tooling
Links
Documentation↗Discussion↗Issues↗Releases↗
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