Klipper MCP Server (Charleslotto/klipper-mcp) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: we have no way to read this server ourselves. No publisher has claimed this listing.
An MCP server that enables AI assistants to control and monitor Klipper 3D printers via the Moonraker API. It supports comprehensive printer management, including G-code execution, toolchanger operations, and real-time status monitoring.
Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
Limited view: static analysis for Python is partially covered.
How we verified
Verified is a snapshot. Live keeps it current, and builds your track record.
⚡ Connect GitHub → continuous verification on every pushwhy connect →Who stands behind it
Charleslotto
Source: Glama
Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →
Install from
M8ven verifies MCPs across every public registry — install directly from whichever one you prefer.
MOONRAKER_URLYour Moonraker address http://localhost:7125MOONRAKER_TIMEOUT_SECONDSMCP_PORTAPI_KEYSecure authentication key python3 -c "import secrets; print(secrets.token_urlsafe(32))"ARMEDEnable dangerous operations falseREAD_ONLYHard-block all state-changing tools (overrides ARMED) falseADMIN_PINPIN for destructive ops 123456PRINTER_DATA_PATHFull path to your printer_data directory ~/printer_dataKLIPPER_DATA_DIRAlternate override for the printer_data base ~/printer_dataCAMERA_SNAPSHOT_URL"http://localhost/webcam/?action=snapshot"CAMERA_STREAM_URL"http://localhost/webcam/?action=stream"SPOOLMAN_ENABLEDEnable Spoolman filament trackingSPOOLMAN_URL"http://localhost:7912"NTFY_ENABLEDNTFY_URLNTFY_TOPICDISCORD_ENABLEDDISCORD_WEBHOOK_URLDiscord notificationsSLACK_WEBHOOK_URLPUSHOVER_USER_KEYPUSHOVER_API_TOKENTTS_ENABLEDTTS_RATETTS_VOLUMETOOL_COUNTNumber of toolchanger toolsMAINTENANCE_DATA_FILEAUDIT_LOG_FILELED_SCENES_FILETool 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
121/121 tools missing one or more hints — backup_config (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_backups (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); restore_config (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +118 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 inputs are validated
63/121 tool handlers declare input schemas (52%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 32/121 tool handlers wrap calls in try/catch (26%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.
[](https://m8ven.ai/mcp/charleslotto-klipper-mcp-1i8z54)?variant=verified to the badge URL.Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.
https://m8ven.ai/api/mcp/tool-check