Kiln (codeofaxel/Kiln) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 469 tools. No publisher has claimed this listing.

Emerging

74/100

10 days ago

Kiln

Item: Kiln
Rating: 74
Author: M8ven

Describe it or draw it — Kiln makes it real. The open-source MCP server for 3D printing: AI agents (Claude, Codex, Cursor, or any MCP client) design, generate, slice & print on Bambu Lab, Creality, Prusa, Elegoo, Klipper/Moonraker, OctoPrint, Duet/RepRapFirmware & any Marlin printer.

→ codeofaxel/Kiln · listed on glama

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.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every push why connect →

Who stands behind it

codeofaxel

Source: Glama · also listed on github_topic, github_repo_search

Is this your MCP?

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 →

⚡ Connect GitHub for Live Monitored

Install from

Glamanot scored here GitHub

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.

// key findings

🚨

Secret credentials may flow to a network call

2 flows detected: KILN_LICENSE_KEY. We can’t prove the destination matches the brand the credential belongs to.

🔐

You'll be asked for 17 credentials: KILN_PRINTER_API_KEY, KILN_THINGIVERSE_TOKEN, KILN_MMF_API_KEY, KILN_CULTS3D_API_KEY, KILN_CRAFTCLOUD_API_KEY, KILN_MESHY_API_KEY, KILN_GEMINI_API_KEY, KILN_ESTOP_INPUT_TOKEN, KILN_STRIPE_SECRET_KEY, KILN_CIRCLE_API_KEY, KILN_TRIPO3D_API_KEY, KILN_STABILITY_API_KEY, KILN_LICENSE_KEY, KILN_OPENROUTER_KEY, OPENROUTER_API_KEY, KILN_AUTH_KEY, KILN_MASTER_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// environment variables

To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.

configKILN_LOG_FORMAT

configKILN_PRINTER_HOST

🔐 secretKILN_PRINTER_API_KEY

configKILN_PRINTER_TYPESet to your backend: octoprint, moonraker, bambu, prusalink, elegoo, duet, or usb — or skip env vars entirely if you've run kiln setup.

configKILN_PRINTER_SERIAL

configKILN_PRINTER_MODEL

configKILN_CONFIRM_UPLOAD

configKILN_CONFIRM_MODE

🔐 secretKILN_THINGIVERSE_TOKEN

🔐 secretKILN_MMF_API_KEY

configKILN_CULTS3D_USERNAME

🔐 secretKILN_CULTS3D_API_KEY

🔐 secretKILN_CRAFTCLOUD_API_KEY

configKILN_FULFILLMENT_PROVIDER

🔐 secretKILN_MESHY_API_KEY

🔐 secretKILN_GEMINI_API_KEY

🔐 secretKILN_ESTOP_INPUT_TOKEN

configKILN_AUTO_PRINT_MARKETPLACE

configKILN_AUTO_PRINT_GENERATED

configKILN_PRINTER_CONFIG_IGNORE_YAML

configKILN_PRINTER_MAINBOARD_ID

configKILN_PRINTER_PORT

configKILN_OVERRIDE_PTFE_LIMIT

configKILN_SKIP_PREVIEW_GATE

🔐 secretKILN_STRIPE_SECRET_KEY

🔐 secretKILN_CIRCLE_API_KEY

configKILN_AGENT_ID

configKILN_SKIP_PREFLIGHT

configKILN_STRICT_MATERIAL_CHECK

configKILN_SKIP_BOUNDS_CHECK

🔐 secretKILN_TRIPO3D_API_KEY

🔐 secretKILN_STABILITY_API_KEY

configKILN_AUTH_HOME

configKILN_API_URL

🔐 secretKILN_LICENSE_KEY

configKILN_AUTH_ENABLED

configKILN_PREVIEW_NOTIFY_CMD

configKILN_PREVIEW_NOTIFY_URL

configKILN_INGEST_SERVICE_DIR

configKILN_ACCEPT_TERMS

configKILN_CAMERA_SOURCE

🔐 secretKILN_OPENROUTER_KEY

🔐 secretOPENROUTER_API_KEY

configKILN_PROXY_URL

configKILN_EVENT_LOG

configXDG_CONFIG_HOME

configKILN_VISION_AUTO_PAUSE

configPROBE_DIR

configKILN_LLM_PRIVACY_MODE

configKILN_AMBIENT_CHECK_ENABLED

configKILN_AMBIENT_COOLDOWN_TEMP_C

🔐 secretKILN_AUTH_KEY

configKILN_AUTONOMY_LEVEL

configKILN_MONITOR_REQUIRE_FIRST_LAYER

configKILN_AUTONOMY_MAX_ORDER_COST

configKILN_MONITOR_MODE

configKILN_BACKUP_INTERVAL

configKILN_BACKUP_KEEP

configKILN_DEVICE_FINGERPRINT

configKILN_RELAY_URL

configKILN_DB_PATH

configKILN_HOSTED_MULTITENANT

configKILN_COMMUNITY_OPT_IN

configKILN_COMMUNITY_TEST_SEND

configPYTEST_CURRENT_TEST

🔐 secretKILN_MASTER_KEY

configKILN_DECORATIONS_DIR

configKILN_CACHE_DIR

configKILN_OPENSCAD_PATH

configKILN_OPENSCAD_BACKEND

configKILN_EMERGENCY_DEBOUNCE_SECONDS

configKILN_TELEMETRY

configKILN_STAGE_INLINE_GEOMETRY

configKILN_HOME

configKILN_LOG_DIR

configKILN_LOG_LEVEL

// quality suggestions

Tool 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

473/473 tools missing one or more hints — printer_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); monitor_print (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); printer_files (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +470 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.

Secrets not logged

2 secret values sent to logger.info/print

Redact or omit secret values from log output.

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.

// full audit trail

The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.

// improvement guidance — verified publishers only

We have 3 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/codeofaxel/kiln)](https://m8ven.ai/mcp/codeofaxel/kiln)

Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.

commit: 77c468a10ebf6c261e941395bbc196098d5c7d76

code hash: 24f603b5a6d6a443cb8f90fc2839362d0bbc1ad190b674bbfef07c201acc1575

verified: 9/2/2026, 4:44:52 PM

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