Voice Agent Linter

com.modernmustardseed/voice-linter

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

Yes, your AI can use this right now.Answered a live MCP handshake in 608 ms with no sign-in needed and exposes 3 tools.

Connect it

Settings → Connectors → Add custom connector
URL: https://mcp.modernmustardseed.com/voice-linter

3 tools, verified live

Pulled straight from the server with tools/list on 2026-10-17.
lint_voice_agentread-only

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 long numbers the voice will misread; no spelling protocol or bare-letter spelling; instructions t

list_lint_rulesread-only

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.

explain_lint_ruleread-only

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.

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