MCP server

Voice Agent Linter

com.modernmustardseed/voice-linter

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Lints a phone voice agent prompt and platform config before real callers reach it.

Working at last checkVerified publisher: modernmustardseed.comAbout 1,379 tokens per request once connected3 tools

https://mcp.modernmustardseed.com/voice-linter

At a glance

Type: MCP server
Publisher: modernmustardseed.com (verified by the MCP Registry)
Status: Working at last check
Tools: 3
Token cost: About 1,379 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http voice-linter https://mcp.modernmustardseed.com/voice-linter

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.voice-linter]
url = "https://mcp.modernmustardseed.com/voice-linter"

Gemini CLI

{"mcpServers":{"voice-linter":{"httpUrl":"https://mcp.modernmustardseed.com/voice-linter"}}}

Cursor

{"mcpServers":{"voice-linter":{"url":"https://mcp.modernmustardseed.com/voice-linter"}}}

VS Code

{"servers":{"voice-linter":{"type":"http","url":"https://mcp.modernmustardseed.com/voice-linter"}}}

Antigravity

agy mcp add voice-linter https://mcp.modernmustardseed.com/voice-linter

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"voice-linter","server_url":"https://mcp.modernmustardseed.com/voice-linter","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"voice-linter","server_url":"https://mcp.modernmustardseed.com/voice-linter"}

explain_lint_rule ~373 tokens
Explain one Voice Agent Linter rule by id: why it exists, a bad and a good example, the fix, the platforms it applies to, and its sources with the date each was read. Static reference, no network access.
lint_voice_agent ~792 tokens
Check a phone voice agent’s system prompt and, optionally, its config JSON (Vapi assistant, Retell agent or LLM, ElevenLabs agent, or OpenAI Realtime session) against rule-based checks learned on live calls. Finds: no live date and dates without a year; phone numbers, emails, URLs, hyphen ranges and
list_lint_rules ~214 tokens
List every Voice Agent Linter rule with its id, title, default severity, category, what it reads (prompt, config or both) and the platforms it applies to. Filter by platform or category. Static reference, no network access.

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