ANTLR4 MCP Server

An MCP server that gives Claude AI the ability to read, analyze, modify, and debug ANTLR4 grammars, enabling grammar debugging and manipulation for Claude Desktop.

→ natl-set/antlr4-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 2 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.

// known CVEs in dependencies2 high

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

high@modelcontextprotocol/sdk@1.0.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.0.0GHSA-w48q-cv73-mx4w

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

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// required environment variables

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

configANTLR4_JAR

configJAVA_HOME

// 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/natl-set-antlr4-mcp-zxpu8x)](https://m8ven.ai/mcp/natl-set-antlr4-mcp-zxpu8x)

commit: 86fcb107f9b54e8f71b58d03ab3983b12550696a

code hash: 31734cbc10b9c87229db1e3dbb2fdaf8f79d1cac9be95cfcee5f31bb480af753

verified: 6/24/2026, 10:03:44 AM

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