instant-mcp

Item: instant-mcp
Rating: 56
Author: M8ven

A local mock MCP server for building against the Model Context Protocol. Write a tool in the browser, save it, and it is immediately available on an MCP endpoint.

→ jhleee/instant-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 8 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// known CVEs in dependencies8 high3 medium7 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@fastify/static@8.0.3GHSA-83w8-p2f5-377r

@fastify/static vulnerable to route guard bypass via path traversal

high@modelcontextprotocol/sdk@1.12.0GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.12.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.12.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

highfastify@5.3.2GHSA-247c-9743-5963

Fastify has a Body Schema Validation Bypass via Leading Space in Content-Type Header

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configINSTANT_MCP_CONTROL— npm run start:control # or =1 npm start

configPORT

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/jhleee-instant-mcp-14nop9)](https://m8ven.ai/mcp/jhleee-instant-mcp-14nop9)

commit: f69690f70c244fe80361a4eb2eb9a7163e67d3d2

code hash: 8475defaf1f8919a3088778683b93a65447d479f148042b2ce98c216f03eeb4f

verified: 7/29/2026, 9:22:27 AM

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