whisper-windows-mcp
A Windows-native MCP server that lets Claude Desktop transcribe audio files locally using whisper.cpp, with no internet connection required.
Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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eviscerations
Source: Glama
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
FFMPEG_PATHPath to ffmpeg if not in system PATHSystemRootWHISPER_CLI_PATHPath to whisper-cli.exe (required)WHISPER_CONSENT_ACKNOWLEDGEDWhen true, skips the one-time session consent disclosure shown before transcript text is returned. Set after you understand the privacy boundary and no longer need the reminder. Has no effect when privacy mode is active.WHISPER_FOREGROUND_MAX_SECForeground-transcription cutoff in seconds (default 210). Files estimated to run longer are routed to background mode instead of risking Claude Desktop's ~4-minute tool timeout.WHISPER_GPU_DEVICEVulkan device index to pin transcription to, for multi-GPU systems (the Vulkan enumeration index — check whisper-cli's startup log; not the Windows GPU order). Overridable per-call with gpu_device. See [TROUBLESHOOTING.md](TROUBLESHOOTING.md).WHISPER_MODELSwitch the active Whisper model for the current session without restarting Claude Desktop. Change is session-scoped — does not persist after restart. To make permanent, update in your config.WHISPER_PRIVACY_MODEOverride privacy mode for this call. true = metadata only, no transcript text transmitted. false = return text even if WHISPER_PRIVACY_MODE=true globally. Omit to use global setting.WHISPER_SERVER_PATHRequires whisper-server.exe (ships alongside whisper-cli.exe). Configure with / WHISPER_SERVER_PORT if needed.WHISPER_SERVER_PORTRequires whisper-server.exe (ships alongside whisper-cli.exe). Configure with WHISPER_SERVER_PATH / if needed.WHISPER_THREADSCPU thread count overridewindirTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
13/13 tools missing one or more hints — transcribe_audio (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); check_progress (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); transcribe_batch (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +10 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool test coverage
Only 3/13 tools referenced in tests (23%)
Write tests that reference each tool by name so every tool has at least one test.
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