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by com.kernelcad
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Send G-code to Printer

send_to_printer
Destructive

Use this when you need to upload a .gcode file (e.g. written by export with target: "model", format: "gcode") to a real network printer and, by default, start the print. protocol: 'octoprint' (POST /api/files/local with an X-Api-Key), 'moonraker' (Klipper's POST /server/files/upload), or 'bambu-lan' (Bambu Lab LAN-mode: FTPS implicit-TLS upload on port 990 as user 'bblp' with the printer's LAN access code, then an MQTT print-start command on port 8883 — requires access_code and, unless start_print is false, serial). bambu-lan uploads a .gcode.3mf print project (the printer prints 3MF projects, not bare G-code): the G-code goes in as Metadata/plate_1.gcode, inside the model 3MF from export format '3mf' when model_3mf_path is given (use options { arrange: 'plate', slicer: 'bambu' } so the printer shows the same named, coloured parts), else inside a minimal 3MF shell; the file name always ends in .3mf ('part.gcode' -> 'part.gcode.3mf'). Optional printer (a bundled profile id, the same ids as the export 3mf/gcode options.printer) is checked against protocol before anything is read or sent: an unknown id is refused with the list of valid ids, 'bambu-lan' needs a Bambu Lab profile and a Bambu Lab profile needs 'bambu-lan'. Pass { dry_run: true } to validate connectivity/authentication only, without uploading or starting a print. Never logs or echoes api_key/access_code.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hostYesPrinter hostname or IP.
portNoOverride the protocol default port.
serialNoBambu printer serial number (required to start a print unless start_print is false).
api_keyNoOctoPrint API key (Settings -> API).
dry_runNoValidate connectivity/auth only; never uploads or starts a print.
printerNoPrinter profile id; checked against protocol before upload. List them with 'kernelcad print printers'.
filenameNoUploaded file name (default: 'kernelcad.gcode'; bambu-lan appends '.3mf').
protocolYes
gcode_pathYesPath to the .gcode file on disk.
access_codeNoBambu LAN-mode access code (printer settings -> LAN Only Mode).
start_printNoStart the print immediately after upload (default: true).
model_3mf_pathNobambu-lan only: model .3mf from export format '3mf' to package the G-code into (the uploaded .gcode.3mf).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • removedOutput schema / properties
      Removed value: -{
-  "diagnostics": {
-    "items": {
-      "additionalProperties": true,
-      "type": "object"
-    },
-    "type": "array"
-  },
-  "dry_run": {
-    "description": "True when only connectivity/auth was validated (no upload, no print start).",
-    "type": "boolean"
-  },
-  "error": {
-    "type": "string"
-  },
-  "ok": {
-    "type": "boolean"
-  },
-  "uploaded_path": {
-    "description": "Path/name the G-code (bambu-lan: the .gcode.3mf print file) was stored under on the printer.",
-    "type": "string"
-  }
-}
    • removedOutput schema / required
      Removed value: -[
-  "ok"
-]
  2. Changed4 schema fields changed
    • changedInput schema / properties / filename / description
      Previous value: -"Uploaded file name (default: 'kernelcad.gcode')."New value: +"Uploaded file name (default: 'kernelcad.gcode'; bambu-lan appends '.3mf')."
    • addedInput schema / properties / model_3mf_path
      Added value: +{
+  "description": "bambu-lan only: model .3mf from export format '3mf' to package the G-code into (the uploaded .gcode.3mf).",
+  "type": "string"
+}
    • addedInput schema / properties / printer
      Added value: +{
+  "description": "Printer profile id; checked against protocol before upload. List them with 'kernelcad print printers'.",
+  "enum": [
+    "generic-fdm",
+    "bambu-a1-mini",
+    "bambu-a1",
+    "bambu-p1s",
+    "bambu-p1p",
+    "bambu-x1c",
+    "bambu-x1e",
+    "bambu-h2d",
+    "bambu-h2s",
+    "prusa-mini-plus",
+    "prusa-mk4s",
+    "prusa-core-one",
+    "prusa-xl",
+    "creality-ender-3-v3",
+    "creality-k1",
+    "creality-k1-max",
+    "creality-k2-plus",
+    "elegoo-neptune-4-pro",
+    "anycubic-kobra-3",
+    "voron-2.4-250",
+    "voron-2.4-300",
+    "voron-2.4-350",
+    "ultimaker-s5"
+  ],
+  "type": "string"
+}
    • changedOutput schema / properties / uploaded_path / description
      Previous value: -"Path/name the G-code was stored under on the printer."New value: +"Path/name the G-code (bambu-lan: the .gcode.3mf print file) was stored under on the printer."
  3. Added

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