kiln

name: kiln

description: Control 3D printers with AI agents — 273 MCP tools, 107 CLI commands, text/sketch-to-3D generation, model marketplace search, multi-printer fleet support, safety enforcement, and outsourced manufacturing

homepage: https://kiln3d.com

user-invocable: true

metadata: {"openclaw":{"emoji":"🏭","os":["darwin","linux"],"requires":{"env":["KILN_PRINTER_HOST","KILN_PRINTER_API_KEY"],"bins":["kiln"],"anyBins":["prusaslicer","orcaslicer"]},"primaryEnv":"KILN_PRINTER_HOST","install":[{"kind":"uv","pkg":"kiln3d","git":"https://github.com/codeofaxel/Kiln.git","subdirectory":"kiln"}],"optional":{"env":["KILN_PRINTER_TYPE","KILN_PRINTER_MODEL","KILN_AUTONOMY_LEVEL","KILN_HEATER_TIMEOUT","KILN_CRAFTCLOUD_API_KEY","KILN_SCULPTEO_API_KEY","KILN_MESHY_API_KEY","KILN_TRIPO3D_API_KEY","KILN_STABILITY_API_KEY","KILN_GEMINI_API_KEY"]}}}

Kiln — Agent Skill Definition

You are controlling a physical 3D printer through Kiln.

Physical actions are irreversible and can damage hardware. Follow

these rules strictly.

Quick Start

kiln setup          # interactive wizard — finds printers, saves config

kiln verify         # check everything is working

kiln status --json  # see what the printer is doing

Then ask the human what they'd like to print.

Which Interface to Use

Kiln supports two interfaces. Pick based on your capabilities:

| | CLI | MCP |

|---|---|---|

| Use when | You have a shell/exec tool | You have an MCP client configured |

| How it works | kiln <command> [flags] --json | MCP tool calls with JSON arguments |

| Response format | JSON to stdout (with --json) | Structured JSON objects |

| Setup | Just env vars + kiln on PATH | kiln serve running as MCP server |

| Tool count | 107 CLI commands | 273 MCP tools |

| Best for | Quick start, debugging, simple workflows | Tight integration, full tool catalog |

Don't know which? Try CLI first. Run kiln status --json. If that

works, you're good. MCP gives you more tools but requires server setup.

CLI Interface

Run commands via your shell/exec tool. Always use --json for

machine-readable output.

kiln <command> [options] --json

First-Time Setup

If the printer isn't configured yet, run these first:

# Interactive wizard: auto-discovers printers, saves config, tests connection

kiln setup



# Or manually add a printer

kiln auth --name my-printer --host http://192.168.1.100 --type octoprint --api-key YOUR_KEY



# Verify everything works (Python, slicer, config, printer reachable, database)

kiln verify



# Scan network for printers

kiln discover --json

After setup, config is saved to ~/.kiln/config.yaml — no env vars needed.

Core Commands

# Check printer status (start here)

kiln status --json



# List files on printer

kiln files --json



# Run safety checks before printing

kiln preflight --json

kiln preflight --material PLA --json



# Upload a G-code file

kiln upload /path/to/model.gcode --json



# Start printing (auto-uploads local files, auto-runs preflight)

kiln print model.gcode --json

kiln print model.gcode --dry-run --json   # preview without starting



# Cancel / pause / resume

kiln cancel --json

kiln pause --json

kiln resume --json



# Set temperatures

kiln temp --tool 210 --bed 60 --json

kiln temp --json                        # read current temps (no flags)



# Send raw G-code

kiln gcode G28 "G1 X50 Y50 F3000" --json



# Slice STL to G-code

kiln slice model.stl --json

kiln slice model.stl --print-after --json   # slice + upload + print



# Webcam snapshot

kiln snapshot --save photo.jpg --json



# Wait for print to finish (blocks until done)

kiln wait --json



# Print history

kiln history --json

kiln history --status completed --json



# Discover printers on network

kiln discover --json



# Cost estimate

kiln cost model.gcode --json

Outsourced Manufacturing (Fulfillment)

No local printer? Printer busy? Kiln can outsource to manufacturing

services (Craftcloud, Sculpteo) with the same CLI.

# List available materials from configured service

kiln order materials --json



# Get a manufacturing quote (uploads model, returns pricing + lead time)

kiln order quote model.stl -m pla_standard --json



# Place the order [confirm — ask human first, shows price]

kiln order place QUOTE_ID --json



# Track order status

kiln order status ORDER_ID --json



# Cancel (if still cancellable)

kiln order cancel ORDER_ID --json



# Compare local printing vs. outsourced cost side-by-side

kiln compare-cost model.gcode --fulfillment-material pla_standard --json

Setup: Set one of these env vars (or add to ~/.kiln/config.yaml):

export KILN_CRAFTCLOUD_API_KEY="your_key"     # Craftcloud (easiest — one key)

# OR

export KILN_SCULPTEO_API_KEY="your_key"       # Sculpteo

Agent workflow: Check local printer → if unavailable/busy → quote

fulfillment → present price to human → human approves → place order →

return tracking link.

Text & Sketch to 3D Generation

Generate printable 3D models from text descriptions or napkin sketches.

Kiln auto-discovers providers from environment variables.

# List available generation providers [safe]

kiln generate list --json



# Generate a model from text [confirm — creates new file]

kiln generate "a small vase with organic curves" --provider gemini --json

kiln generate "phone stand" --provider meshy --style organic --json



# Check generation status (for async providers like Meshy/Tripo3D)

kiln generate status JOB_ID --json



# Download completed result

kiln generate download JOB_ID --json

MCP equivalents:

{"name": "list_generation_providers", "arguments": {}}

{"name": "generate_model", "arguments": {"prompt": "a small vase", "provider": "gemini"}}

{"name": "check_generation_status", "arguments": {"job_id": "gemini-abc123"}}

{"name": "download_generated_model", "arguments": {"job_id": "gemini-abc123"}}

Available providers (set env var to enable):

| Provider | Env Var | Type | Async? |

|----------|---------|------|--------|

| Gemini Deep Think | KILN_GEMINI_API_KEY | AI reasoning → OpenSCAD → STL | No (synchronous) |

| Meshy | KILN_MESHY_API_KEY | Cloud text-to-3D | Yes (poll status) |

| Tripo3D | KILN_TRIPO3D_API_KEY | Cloud text-to-3D | Yes (poll status) |

| Stability AI | KILN_STABILITY_API_KEY | Cloud text-to-3D | Yes (poll status) |

| OpenSCAD | (local binary) | Parametric code → STL | No (synchronous) |

Gemini Deep Think uses Google's Gemini API to reason about geometry

and generate precise OpenSCAD code, which is compiled locally to STL.

Supports text descriptions and sketch/napkin-drawing descriptions.

Requires OpenSCAD installed locally.

Agent workflow: Ask what the user wants → generate with best

available provider → validate mesh → slice → print.

Model Marketplace Search

Search and download existing 3D models from online marketplaces before

generating from scratch.

# Search across all connected marketplaces [safe]

kiln search "phone stand" --json



# Search a specific marketplace [safe]

kiln search "vase" --marketplace thingiverse --json



# Get model details [safe]

kiln model-details thingiverse MODEL_ID --json



# Download a model file [confirm — downloads to local disk]

kiln model-download thingiverse MODEL_ID --json

MCP equivalents:

{"name": "search_all_models", "arguments": {"query": "phone stand"}}

{"name": "search_models", "arguments": {"query": "vase", "marketplace": "thingiverse"}}

{"name": "get_model_details", "arguments": {"marketplace": "thingiverse", "model_id": "12345"}}

{"name": "download_model_file", "arguments": {"marketplace": "thingiverse", "model_id": "12345"}}

Supported marketplaces: Thingiverse, MyMiniFactory, Thangs,

Cults3D, GrabCAD, Etsy.

Agent workflow: User describes what they want → search marketplaces

→ present top results → if nothing fits, generate from text instead.

Fleet Management

Manage multiple printers as a fleet with job queuing and smart routing.

# Register a printer in the fleet [guarded]

kiln fleet add --name ender3 --host http://192.168.1.100 --type octoprint --json



# Fleet-wide status [safe]

kiln fleet status --json



# Submit a job to the queue (auto-routes to best available printer)

kiln fleet print model.gcode --json



# View job queue [safe]

kiln fleet queue --json

MCP equivalents:

{"name": "fleet_status", "arguments": {}}

{"name": "register_printer", "arguments": {"name": "ender3", "host": "http://192.168.1.100", "type": "octoprint"}}

{"name": "submit_fleet_job", "arguments": {"filename": "model.gcode"}}

{"name": "list_queue", "arguments": {}}

Webhooks

Register HTTP endpoints to receive real-time notifications.

# Register a webhook [guarded]

kiln webhook add https://example.com/hook --events print_complete,print_failed --json



# List webhooks [safe]

kiln webhook list --json



# Delete a webhook [confirm]

kiln webhook delete WEBHOOK_ID --json

All payloads are signed with HMAC-SHA256 for verification.

Multi-Printer Support

# List saved printers

kiln printers --json



# Target a specific printer (works with any command)

kiln --printer my-ender3 status --json

kiln --printer bambu-x1c print model.gcode --json

Run kiln --help for all commands. kiln <command> --help for options.

CLI Response Format

Success — exit code 0, JSON to stdout:

{"status": "printing", "filename": "model.gcode", "progress": 42.5,

 "temps": {"tool": 210.0, "bed": 60.0}}

Error — non-zero exit code, JSON with "error":

{"error": "Printer is offline"}

Warnings — "warnings" array alongside normal data:

{"status": "ok", "warnings": ["Hotend temperature above typical PLA range"]}

Check exit code first (0 = success), then "warnings" in the JSON.

Example Responses

kiln status --json (printing):

{"status": "success", "data": {"printer": {"status": "printing", "temps": {"tool0": {"actual": 210.0, "target": 210.0}, "bed": {"actual": 60.0, "target": 60.0}}}, "job": {"filename": "model.gcode", "progress": 42.5, "time_left": 3600}}}

kiln print model.gcode --json (started):

{"status": "success", "message": "Print started", "filename": "model.gcode"}

kiln order quote model.stl -m pla_standard --json:

{"status": "success", "quote_id": "q_abc123", "price_usd": 12.50, "lead_time_days": 5, "shipping_options": [{"id": "std", "price_usd": 4.99, "days": 7}]}

MCP Interface

If your platform has an MCP client, Kiln exposes 273 tools as an MCP

server. Tools are called by name with JSON arguments — your MCP client

handles the transport.

Starting the MCP Server

kiln serve

Or configure in Claude Desktop (~/.config/Claude/claude_desktop_config.json):

{

  "mcpServers": {

    "kiln": {

      "command": "kiln",

      "args": ["serve"],

      "env": {

        "KILN_PRINTER_HOST": "http://your-printer-ip",

        "KILN_PRINTER_API_KEY": "your_key",

        "KILN_PRINTER_TYPE": "octoprint"

      }

    }

  }

}

MCP Tool Call Format

{"name": "printer_status", "arguments": {}}

{"name": "start_print", "arguments": {"filename": "model.gcode"}}

{"name": "set_temperature", "arguments": {"tool_temp": 210, "bed_temp": 60}}

{"name": "send_gcode", "arguments": {"commands": ["G28", "G1 X50 Y50 F3000"]}}

{"name": "upload_file", "arguments": {"file_path": "/path/to/model.gcode"}}

Parameter names and types are auto-documented by the server — your

client shows them. Call get_started() for an onboarding guide.

MCP Response Format

All tools return JSON objects. Same pattern as CLI:

• Success: tool-specific fields

• Error: {"error": "message", "status": "error"}

• Warnings: "warnings" array alongside data

Setup

Set these environment variables before using Kiln (CLI or MCP):

export KILN_PRINTER_HOST="http://your-printer-ip"

export KILN_PRINTER_API_KEY="your_api_key"

export KILN_PRINTER_TYPE="octoprint"   # or: moonraker, bambu, prusaconnect, elegoo

Verify connectivity:

kiln status --json

File Intelligence

G-code files on printers often have cryptic names (test5112.gcode,

spacer_v3.gcode). Kiln extracts metadata from G-code headers so you

can reason about files without relying on filenames.

# Analyze a specific file [safe]

kiln analyze-file benchy.gcode --json

Returns structured metadata:

{

  "material": "PLA",

  "estimated_time_seconds": 6150,

  "tool_temp": 210.0,

  "bed_temp": 60.0,

  "slicer": "PrusaSlicer 2.7.0",

  "layer_height": 0.2,

  "filament_used_mm": 4523.45

}

How to use file intelligence:

1. List files: kiln files --json — each file now includes metadata

2. Check material match before printing: compare material field with

   loaded material (kiln material show --json)

3. Check estimated time: use estimated_time_seconds to assess duration

4. Validate temperatures: compare tool_temp/bed_temp with safety profile

Example: Choosing an overnight print

"I found 3 files on your printer:

- benchy.gcode — PLA, ~45 min, 210°C/60°C

- phone_stand.gcode — PLA, ~2h 10m, 210°C/60°C

- test5112.gcode — PETG, ~8h 30m, 240°C/80°C



You have PLA loaded. phone_stand.gcode is the best match for overnight

(PLA-compatible, reasonable duration). Want me to start it?"

Safety Model

Kiln enforces physical safety — it will hard-block commands that

exceed temperature limits, contain dangerous G-code, or fail pre-flight

checks. You cannot bypass these.

You enforce operational judgment — deciding when to ask the

human for confirmation vs. acting autonomously. This document defines

those rules.

Autonomy Tiers

The human configures how much autonomous control you have. Check

kiln autonomy show --json to see the current level.

| Level | Name | Behavior |

|-------|------|----------|

| 0 | Confirm All | (Default) Every confirm-level tool requires human approval. |

| 1 | Pre-screened | You may skip confirmation IF the operation passes configured constraints (material, time, temperature). |

| 2 | Full Trust | You may execute any tool autonomously. Only emergency tools still need confirmation. |

Level 1 Constraints

At Level 1, the human pre-configures safety boundaries:

# ~/.kiln/config.yaml

autonomy:

  level: 1

  constraints:

    max_print_time_seconds: 14400     # 4 hours max

    allowed_materials: ["PLA", "PETG"] # only these materials

    max_tool_temp: 260                 # hotend ceiling

    max_bed_temp: 100                  # bed ceiling

    require_first_layer_check: true    # must monitor first layer before leaving print unattended

Your workflow at Level 1:

1. Analyze the file (kiln files --json or kiln analyze-file FILE --json)

2. Check constraints: material in allowed list? Time under limit? Temps OK?

3. If ALL constraints pass → proceed without asking

4. If ANY constraint fails → ask the human, explain which constraint failed

Example: Level 1 autonomous print

File: phone_stand.gcode

  Material: PLA ✓ (in allowed list)

  Time: 2h 10m ✓ (under 4h limit)

  Tool temp: 210°C ✓ (under 260°C limit)

  Bed temp: 60°C ✓ (under 100°C limit)

→ All constraints passed. Starting print autonomously.

Example: Level 1 blocked print

File: test5112.gcode

  Material: PETG ✓

  Time: 8h 30m ✗ (exceeds 4h limit)

→ Constraint failed. Asking human for permission.

Level 2 Full Trust

The human has explicitly given you permission to operate freely.

This is typically set with a statement like:

"Every file on my printer is for generic PLA, will print in under 2 hours, and is safe."

At Level 2, you may start prints, set temperatures, and send G-code

without asking — but you MUST still:

• Run preflight checks (Kiln does this automatically)

• Respect Kiln's hard safety limits (temperature caps, blocked G-code)

• Report what you did after the fact

• Monitor the print if camera is available

Env Var Override

export KILN_AUTONOMY_LEVEL=1  # Quick override without editing config

Tool Safety Levels

Every command has a safety level. Follow the expected behavior exactly.

Autonomy level modifies confirm-level behavior only. Safe, guarded,

and emergency levels are unaffected by autonomy settings.

| Level | Meaning | Your Behavior |

|-------|---------|---------------|

| safe | Read-only, no physical effect | Call freely. No confirmation needed. |

| guarded | Has physical effect but low-risk. Kiln enforces limits. | Call without asking. Report what you did. |

| confirm | Irreversible or significant state change. | Depends on autonomy level. Level 0: ask human. Level 1: check constraints. Level 2: proceed. |

| emergency | Safety-critical. | Always ask the human unless active danger (thermal runaway, collision). |

Command Safety Classifications

Safe (read-only, call freely)

| Command | Description |

|---------|-------------|

| kiln status --json | Printer state, temps, progress |

| kiln files --json | List files on printer |

| kiln preflight --json | Pre-print safety checks |

| kiln printers --json | List saved printers |

| kiln discover --json | Scan network for printers |

| kiln history --json | Print history |

| kiln cost FILE --json | Cost estimation |

| kiln snapshot --json | Webcam snapshot |

| kiln verify / kiln doctor | System health check |

| kiln material show --json | Current material |

| kiln material spools --json | Spool inventory |

| kiln level --status --json | Bed leveling status |

| kiln firmware status --json | Firmware versions |

| kiln plugins list --json | Installed plugins |

| kiln order materials --json | List fulfillment materials |

| kiln order status ID --json | Track order |

| kiln order quote FILE --json | Get manufacturing quote |

| kiln compare-cost FILE --json | Local vs. outsourced cost |

| kiln autonomy show --json | Current autonomy level and constraints |

| kiln analyze-file FILE --json | G-code file metadata (material, time, temps) |

| kiln watch --json | Monitor active print's first layer (read-only) |

Guarded (low-risk, report what you did)

| Command | Description |

|---------|-------------|

| kiln pause --json | Pause print (reversible) |

| kiln resume --json | Resume print (reversible) |

| kiln upload FILE --json | Upload G-code (Kiln validates) |

| kiln slice FILE --json | Slice model (CPU only, no printer effect) |

| kiln wait --json | Wait for print to finish |

| kiln material set --json | Set loaded material |

Confirm (ask human first)

| Command | Description | What to confirm |

|---------|-------------|-----------------|

| kiln print FILE --json | Start printing (auto-preflight, --dry-run to preview, --skip-preflight to bypass) | File name and material |

| kiln cancel --json | Cancel print | Irreversible — print cannot resume |

| kiln temp --tool X --bed Y --json | Set temperatures | What temp and why |

| kiln gcode CMD... --json | Raw G-code | What commands and why |

| kiln slice FILE --print-after --json | Slice + print | Full pipeline |

| kiln level --trigger --json | Bed leveling | Physical bed probing |

| kiln firmware update --json | Firmware update | High risk |

| kiln order place QUOTE_ID --json | Place manufacturing order | Price and shipping |

| kiln order cancel ORDER_ID --json | Cancel order | May not be reversible |

| kiln autonomy set LEVEL --json | Change autonomy level | Security-sensitive |

| start_monitored_print (MCP) | Start print + monitor first layer | File name and material |

Emergency (ask human unless active danger)

| Command | Description |

|---------|-------------|

| kiln gcode M112 --json | Emergency stop. Only for genuine emergencies. |

Recommended Workflows

Upload and Print

# 1. Dry-run first [safe — preview what will happen]

kiln print model.gcode --dry-run --json



# 2. Start print [confirm — ask human first]

#    kiln print auto-uploads local files AND runs preflight automatically

#    "Ready to print model.gcode with PLA. Proceed?"

kiln print model.gcode --json



# 3. Monitor progress [safe]

kiln status --json              # check periodically

kiln snapshot --save check.jpg  # visual check after first layer



# 4. Wait for completion [safe]

kiln wait --json

kiln print auto-uploads local files and runs pre-flight checks.

Use --skip-preflight to bypass, --dry-run to preview without starting.

Temperature Adjustment

# 1. Check current temps [safe]

kiln temp --json



# 2. Set temps [confirm — tell human: "Setting hotend to 210°C, bed to 60°C for PLA. OK?"]

kiln temp --tool 210 --bed 60 --json

# IF warnings: relay them

Emergency Response

# 1. Detect issue

kiln status --json   # check for ERROR state or temp anomalies



# 2. IF thermal runaway or physical danger:

kiln gcode M112 --json   # emergency stop — may bypass confirmation

# Then immediately tell human: "Emergency stop triggered because: {reason}"



# 3. IF quality issue but no immediate danger:

# Ask human: "Detected potential failure. Cancel print?"

kiln cancel --json   # only after human confirms

Print Monitoring Loop

Preferred: Use start_monitored_print (MCP) or kiln watch (CLI).

These tools combine starting the print with automatic first-layer monitoring.

# CLI — start print with first-layer monitoring

kiln watch --printer myprinter --delay 120 --checks 3 --interval 60 --json



# MCP — start_monitored_print tool does the same thing

start_monitored_print / kiln watch:

1. Starts the print

2. Waits 2 minutes for first layer to begin

3. Captures 3 webcam snapshots at 1-minute intervals

4. Returns snapshots + heuristic analysis (brightness, variance, warnings)

5. Auto-pauses if a failure is reported with confidence >= 0.8

Monitoring tiers (adapt to your capabilities):

| Your Capabilities | How to Monitor |

|---|---|

| Vision + Camera | Inspect the returned base64 snapshots visually. Look for bed adhesion, warping, extrusion consistency. |

| No Vision + Camera | Use the snapshot_analysis fields: brightness, variance, warnings, heuristic_pass. Low brightness = camera off. Low variance = empty bed or blocked camera. |

| No Camera | Fall back to telemetry: kiln status --json every 5 min. Watch for temp anomalies, progress stalls, error states. |

After first-layer check passes, continue periodic monitoring:

1. Every 5-10 minutes: kiln status --json — check for:

   • Temperature anomalies (sudden drops = heater failure)

   • Progress stalls (same % for >10 min = possible jam)

   • Error states

2. On completion: cool down heaters

| Situation | Action | Command |

|-----------|--------|---------|

| First layer failure | Pause + alert human | kiln pause --json |

| Temperature anomaly | Alert human | kiln status --json |

| Filament runout | Pause + alert human | kiln pause --json |

| Progress stalled | Alert human (do NOT cancel) | kiln status --json |

| Spaghetti / detach | Emergency stop | kiln gcode M112 --json |

| Normal completion | Cool down | kiln temp --tool 0 --bed 0 --json |

Autonomous Overnight Print

The full workflow for safe autonomous printing while the user sleeps:

1. Analyze:  kiln analyze-file FILE --json

             → Get material, estimated time, temps from G-code metadata.



2. Check autonomy:  kiln autonomy show --json

             → Verify Level 1+ and constraints pass.



3. Start with monitoring:  start_monitored_print(file_name="FILE")

             → Starts print + automatic first-layer checks.



4. Review first layer snapshots:

   - Vision agents: inspect the images directly

   - Text agents: check heuristic_pass, brightness, variance

   - If issues: print is already auto-paused. Alert human.

   - If clean: print continues unattended.



5. Periodic telemetry:  kiln status --json  (every 10 min)

             → Watch for temp drift, progress stalls, errors.



6. Completion:  kiln temp --tool 0 --bed 0 --json

             → Cool down. Report result to human in morning.

Key safety net: If require_first_layer_check is enabled in autonomy

constraints, the agent MUST use start_monitored_print instead of

start_print. The autonomy check will remind you with

"require_first_layer_check": true in the response.

Operational Policies

Heater Idle Protection

Never set temperatures on an idle printer unless the human explicitly

asks for pre-heating. If you do, remind: "Heaters are on. Remember to

turn them off when done."

Kiln includes a heater watchdog that automatically cools down

heaters left on without an active print. Default timeout is 30 minutes

(KILN_HEATER_TIMEOUT). Set to 0 to disable. The watchdog will NOT

intervene while a print is active — it only triggers on idle heaters.

Relay All Warnings

When Kiln returns warnings, always relay them to the human verbatim.

Never Generate G-code

Never write or modify G-code. Use kiln slice for slicing, or use

pre-sliced files already on the printer.

Material Awareness

Before printing, check loaded material (kiln material show --json).

If mismatched with what the G-code expects, warn the human.

First-Layer Monitoring

If camera available, check the first few minutes of a new print with

kiln snapshot. If something looks wrong, ask the human before acting.

What Kiln Enforces (you cannot bypass)

| Protection | How |

|-----------|-----|

| Max temperature per printer model | Safety profiles (per KILN_PRINTER_MODEL) |

| Blocked G-code commands | M112, M500-502, M552-554, M997 always rejected |

| Pre-flight before printing | Mandatory — kiln print runs it automatically |

| G-code validation on upload | Full file scanned for blocked commands |

| G-code validation on send | Every kiln gcode call is validated |

| Rate limiting | Dangerous commands have cooldowns to prevent spam |

| File size limits | 500MB upload max |

| Heater auto-off | Idle heaters auto-cool after KILN_HEATER_TIMEOUT min (default 30) |

Licensing & Feature Tiers

Kiln uses a tiered licensing model. Most features are free forever.

| Tier | Price | Key Features |

|------|-------|--------------|

| Free | $0 | All printer control, slicing, safety enforcement, text-to-3D generation, marketplace search, CLI + MCP tools, single printer |

| Pro | Paid | Fleet management (multi-printer), fleet analytics, priority job queue |

| Business | Paid | Outsourced manufacturing (Craftcloud/Sculpteo fulfillment ordering + cancellation) |

| Enterprise | Paid | Dedicated MCP server, SSO authentication, audit trail export, role-based access, lockable safety profiles, on-prem deployment |

Revenue tracking: Kiln takes a 2.5% platform fee on revenue from

models published through Kiln's marketplace pipeline (configurable via

KILN_PLATFORM_FEE_PCT, range 0.0–15.0%). Local printing is always free.

License key: Set via KILN_LICENSE_KEY env var or ~/.kiln/license file.

No key = free tier. Keys are prefixed kiln_pro_, kiln_biz_, kiln_ent_.

Configuration

Preferred: kiln setup (interactive wizard, saves to ~/.kiln/config.yaml).

Alternative: env vars (useful for Docker/CI):

| Env Var | Purpose | Default |

|---------|---------|---------|

| KILN_PRINTER_HOST | Printer URL (e.g. http://192.168.1.100) | (from config) |

| KILN_PRINTER_API_KEY | Printer API key | (from config) |

| KILN_PRINTER_TYPE | octoprint / moonraker / bambu / prusaconnect / elegoo | octoprint |

| KILN_PRINTER_MODEL | Safety profile id (e.g. ender3, bambu_x1c) | (generic limits) |

| KILN_AUTONOMY_LEVEL | Autonomy tier: 0 (confirm all), 1 (pre-screened), 2 (full trust) | 0 |

| KILN_HEATER_TIMEOUT | Minutes before idle heaters auto-cool (0=disabled) | 30 |

| KILN_MONITOR_REQUIRE_FIRST_LAYER | Require first-layer monitoring for autonomous prints | false |

| KILN_MONITOR_FIRST_LAYER_DELAY | Seconds before first snapshot after print starts | 120 |

| KILN_MONITOR_FIRST_LAYER_CHECKS | Number of first-layer snapshots to capture | 3 |

| KILN_MONITOR_FIRST_LAYER_INTERVAL | Seconds between first-layer snapshots | 60 |

| KILN_MONITOR_AUTO_PAUSE | Auto-pause on detected failure | true |

| KILN_MONITOR_REQUIRE_CAMERA | Refuse to start monitored print without camera | false |

| KILN_VISION_AUTO_PAUSE | Auto-pause on vision failure detection (confidence >= 0.8) | false |

| KILN_CRAFTCLOUD_API_KEY | Craftcloud fulfillment API key | (none) |

| KILN_SCULPTEO_API_KEY | Sculpteo partner API key | (none) |

| KILN_MESHY_API_KEY | Meshy text-to-3D API key | (none) |

| KILN_TRIPO3D_API_KEY | Tripo3D text-to-3D API key | (none) |

| KILN_STABILITY_API_KEY | Stability AI text-to-3D API key | (none) |

| KILN_GEMINI_API_KEY | Google Gemini Deep Think API key | (none) |

| KILN_LICENSE_KEY | License key (Pro/Business/Enterprise) | (free tier) |

| KILN_PLATFORM_FEE_PCT | Platform fee % on marketplace revenue | 2.5 |