VOICEVOX MCP Server

Item: VOICEVOX MCP Server
Rating: 60
Author: M8ven

Enables Claude Desktop and Claude Code to synthesize and play speech using VOICEVOX text-to-speech engine. Supports multiple voice characters, session-based voice assignment, and queue management for audio playback.

→ arrow2nd/vv-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 3 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 dependencies3 high

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

high@modelcontextprotocol/sdk@1.17.4GHSA-345p-7cg4-v4c7

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

high@modelcontextprotocol/sdk@1.17.4GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.17.4GHSA-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.

configDEFAULT_SPEED— 1.0 デフォルトの話速

configDEFAULT_VOICE_ID— 47 デフォルトの音声ID (ナースロボ＿タイプＴ)

configVOICEVOX_URL— "": "http://localhost:50021",

configVV_MCP_STATE_DIR— システム一時ディレクトリ共有状態ファイルの保存ディレクトリ

// 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/arrow2nd-vv-mcp-1bx7ul)](https://m8ven.ai/mcp/arrow2nd-vv-mcp-1bx7ul)

commit: 285ecfa33f1d761653045b88f77e2dcd8c7f33a5

code hash: 8011cafde0101168ad18636ee74b3a8eb3e404e7aa36a364a9bc2086328e6dcf

verified: 6/17/2026, 12:27:06 PM

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