Skills/npm/bambu-printer-mcp

bambu-printer-mcp@1.1.76

VERIFIED· not started

Publisher claims: "MCP server for Bambu Lab 3D printers with STL manipulation, slicing, and print management" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher dmontgomery40 · publishing for 709 daysInstalls 26,188Last detonated 8d ago
$claude mcp add bambu-printer-mcp -- npx -y bambu-printer-mcp
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Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
install scripts, with decoy credentials in place · second launch with the clock 45 days ahead · the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

Code inventory arrives with this version's next honeypot run.
It will ask for
unknown until the next run
Where it talks to
unknown until the next run
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Not enough was observed to say yet. Not started: dependency install failed; the server itself was not observed. This version's code has not been inventoried for credentials and hosts either; both arrive with its next honeypot run (popular servers first). `vet-skills try bambu-printer-mcp` runs it now and prints the full answer.

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (3 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-07 and scored it 81/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 1 s · 3 scenarios · 0 deviations
t+CategoryObserved action
0.1sprocessexited 1: Node.js v22.23.4
0.8sprocessdependency install exit 1
1.0sprocessexec /usr/bin/date
1.0sprocessexec /usr/bin/timeout
1.0sclaimedno tools/list reply (exit 0)
1.0sprocessscript backend runs setup only
1.0sprocesssecond launch, clock +45 days, CI unset
1.1sprocessexec /usr/bin/faketime
1.1sprocessexited 1: Node.js v22.23.4

Static findings

HIGH
Access to sensitive file pathssrc/design-app-setup.ts:362 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** A login agent that gives Fusion the add-in's port however Fusion is opened (a GUI app never reads this .env). */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/counterpart/setup.ts:4 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* to this server's .env and never needs its own printer or model tables. Pure: no printer traffic, no secrets returned.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/design-app-setup.ts:100 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfunction envFile(system: SetupSystem): string { return path.resolve(system.cwd, ".env"); }Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/design-app-setup.ts:140 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** One change at a time per server: overlapping updates would interleave backups, renames and .env writes. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/design-app-setup.ts:99 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** The server's own `.env`, when it has one: a client's env block has no file to update. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/design-app-setup.ts:30 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** The working directory dotenv read `.env` from when the server started. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/counterpart/remote.ts:100 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfusion_mcp_setup: { install: "raw" }, // installs into the person's Fusion, a login item and this server's .envFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/index.ts:121 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// counterpart_print_route changes these at run time (and in the .env file they came from).Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/index.ts:101 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// directory, as dotenv's own .env lookup is. Slicer CLIs receive paths underFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
File type combined with upload actiondist/index.js:3180 · File type combined with upload action — agent may exfiltrate local data filesdescription: "Export the open Fusion design into an existing directory as <name>.stl (export_stl of one body), <name>.f3d (export_f3d) and <name>.parameters.json (its user parameters), and return theiFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Process kill commandsrc/printers/bambu.ts:2292 · Process kill command — agent can terminate processes// 5.x/6.x line; we rely on the outer kill timer instead so we don'tFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandsrc/stl/stl-manipulator.ts:2096 · Process kill command — agent can terminate processesprocess.kill(); // Attempt to kill the slicer processFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File type combined with upload actionsrc/index.ts:5149 · File type combined with upload action — agent may exfiltrate local data files// The report always says failed (a result.json that says success can still leave no output file).Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionsrc/slicer/slice-cache.ts:124 · File type combined with upload action — agent may exfiltrate local data filesconst meta = JSON.parse(await fs.promises.readFile(path.join(entry, "meta.json"), "utf8")) as { outputs?: unknown; saved?: unknown };Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionsrc/slicer/slice-cache.ts:157 · File type combined with upload action — agent may exfiltrate local data filesawait fs.promises.writeFile(path.join(staging, "meta.json"), JSON.stringify({ outputs: run.outputs.length, saved, keptAt: new Date().toISOString() }));Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionsrc/stl/stl-manipulator.ts:1863 · File type combined with upload action — agent may exfiltrate local data files// Example: curaengine slice -v -j cura_settings.json -s layer_height=0.2 -o output.gcode -l input.stlFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Access to sensitive file pathssrc/index.ts:3547 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: "Counterpart contract (counterpart/1): the printers this server drives and the settings it reads for each, by .env variable name (first canonical, then aliases): label, hint, whether requFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Process kill commandsrc/stl/stl-manipulator.ts:2100 · Process kill command — agent can terminate processesreject(new Error("Slicing operation cancelled, but failed to kill process."));Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commanddist/printers/bambu.js:2064 · Process kill command — agent can terminate processes// 5.x/6.x line; we rely on the outer kill timer instead so we don'tFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File type combined with upload actiondist/slicer/slice-cache.js:162 · File type combined with upload action — agent may exfiltrate local data filesawait fs.promises.writeFile(path.join(staging, "meta.json"), JSON.stringify({ outputs: run.outputs.length, saved, keptAt: new Date().toISOString() }));Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionsrc/index.ts:3691 · File type combined with upload action — agent may exfiltrate local data filesdescription: "Export the open Fusion design into an existing directory as <name>.stl (export_stl of one body), <name>.f3d (export_f3d) and <name>.parameters.json (its user parameters), and return theiFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
LOW
Prompt injectionREADME.md:48 · Prompt injection — known jailbreak technique reference · informational: not an instruction file · informational: not an instruction file · informational: not an instruction fileUse direct LAN printing by default. Explain any LAN/Developer Mode settingFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
MEDIUM
Process kill commanddist/index.js:64 · Process kill command — agent can terminate processes// below and kill the server before it ever opens the stdio transport.Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandsrc/index.ts:98 · Process kill command — agent can terminate processes// below and kill the server before it ever opens the stdio transport.Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
LOW
Prompt injectionREADME.md:963 · Prompt injection — known jailbreak technique reference · informational: not an instruction file · informational: not an instruction file · informational: not an instruction file`bed_type` defaults to `textured_plate` if omitted. `nozzle_type` (`stainless_steel`, `hardened_steel`, `tungsten_carbide`, `brass`; default `BAMBU_NOZZLE_TYPE`) sets the installed nozzle when the proFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
MEDIUM
File type combined with upload actiondist/index.js:4415 · File type combined with upload action — agent may exfiltrate local data files// The report always says failed (a result.json that says success can still leave no output file).Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Process kill commandsrc/stl/stl-manipulator.ts:2099 · Process kill command — agent can terminate processesconsole.error("Error attempting to kill slicer process:", killError);Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Access to sensitive file pathssrc/index.ts:3639 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: `Check or install what the Fusion bridge needs on macOS: Autodesk Fusion itself (found, never installed), the Fusion360MCP add-in from ${FUSION_ADDIN_REPOSITORY} at ${FUSION_MCP_PIN} (eveFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/tool-annotations.ts:78 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// Replaces BAMBU_DEFAULT_CONNECTION_MODE/TYPE in .env and in this process.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/tool-annotations.ts:120 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// the Fusion add-in folder, a login item and this server's .env are written. Repeating finds them current.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/index.ts:3575 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: "Counterpart contract (counterpart/1): how this server reaches the printer for prints and for Stop/Pause/Resume. route is \"lan\" (the local network through FULU's BambuNetwork bridge, orFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagesrc/bambu-native.ts:179 · npx invocation of non-well-known package — may execute untrusted codereturn `npx -y -p bambu-printer-mcp${version ? `@${version}` : ""} bambu-printer-mcp-native-setup${homeOption}`;Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagedist/bambu-native.js:95 · npx invocation of non-well-known package — may execute untrusted codereturn `npx -y -p bambu-printer-mcp${version ? `@${version}` : ""} bambu-printer-mcp-native-setup${homeOption}`;Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
LOW
Authorization escalation languageREADME.md:963 · Authorization escalation language · informational: not an instruction file · informational: not an instruction file · informational: not an instruction file`bed_type` defaults to `textured_plate` if omitted. `nozzle_type` (`stainless_steel`, `hardened_steel`, `tungsten_carbide`, `brass`; default `BAMBU_NOZZLE_TYPE`) sets the installed nozzle when the proFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
HIGH
Access to sensitive file pathsdist/counterpart/setup.js:4 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* to this server's .env and never needs its own printer or model tables. Pure: no printer traffic, no secrets returned.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/bambu-native.ts:371 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesenv: { ...env, ...install.env },Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.d.ts:220 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** The .env this server read at start, when there is one. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
Authorization escalation languageREADME.md:1497 · Authorization escalation language · informational: not an instruction file · informational: not an instruction file · informational: not an instruction file7. **Network requirements depend on the path.** Direct MQTT/FTPS tools require local reachability and compatible LAN/Developer Mode settings. FULU bridge cloud jobs use BambuNetwork and require its ruFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
HIGH
Access to sensitive file pathsdist/design-app-setup.d.ts:193 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** A login agent that gives Fusion the add-in's port however Fusion is opened (a GUI app never reads this .env). */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.d.ts:351 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesreadonly description: "The .env this server read at start, when there is one.";Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.js:358 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** A login agent that gives Fusion the add-in's port however Fusion is opened (a GUI app never reads this .env). */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/counterpart/remote.js:76 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfusion_mcp_setup: { install: "raw" }, // installs into the person's Fusion, a login item and this server's .envFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.js:92 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** The server's own `.env`, when it has one: a client's env block has no file to update. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/index.js:86 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// counterpart_print_route changes these at run time (and in the .env file they came from).Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
Authorization escalation languageREADME.md:48 · Authorization escalation language · informational: not an instruction file · informational: not an instruction file · informational: not an instruction fileUse direct LAN printing by default. Explain any LAN/Developer Mode settingFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
HIGH
Access to sensitive file pathsdist/tool-annotations.js:92 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// the Fusion add-in folder, a login item and this server's .env are written. Repeating finds them current.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/index.js:3064 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: "Counterpart contract (counterpart/1): how this server reaches the printer for prints and for Stop/Pause/Resume. route is \"lan\" (the local network through FULU's BambuNetwork bridge, orFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.js:93 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfunction envFile(system) { return path.resolve(system.cwd, ".env"); }Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/index.js:3128 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: `Check or install what the Fusion bridge needs on macOS: Autodesk Fusion itself (found, never installed), the Fusion360MCP add-in from ${FUSION_ADDIN_REPOSITORY} at ${FUSION_MCP_PIN} (eveFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/index.js:67 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// directory, as dotenv's own .env lookup is. Slicer CLIs receive paths underFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
Prompt injectionREADME.md:1497 · Prompt injection — known jailbreak technique reference · informational: not an instruction file · informational: not an instruction file · informational: not an instruction file7. **Network requirements depend on the path.** Direct MQTT/FTPS tools require local reachability and compatible LAN/Developer Mode settings. FULU bridge cloud jobs use BambuNetwork and require its ruFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
HIGH
Access to sensitive file pathsdist/design-app-setup.d.ts:8 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** The working directory dotenv read `.env` from when the server started. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.d.ts:267 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* Adds the bridge settings this server is missing to its own .env, after a copy of the file. A configuredFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.js:134 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/** One change at a time per server: overlapping updates would interleave backups, renames and .env writes. */Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/design-app-setup.js:464 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files: "This server has no .env file to add its Fusion settings to: add FUSION_MCP_COMMAND and FUSION_MCP_ARGS to its configuration."] : []),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/bambu-native.js:269 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesenv: { ...env, ...install.env },Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/tool-annotations.js:54 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// Replaces BAMBU_DEFAULT_CONNECTION_MODE/TYPE in .env and in this process.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/index.js:3036 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdescription: "Counterpart contract (counterpart/1): the printers this server drives and the settings it reads for each, by .env variable name (first canonical, then aliases): label, hint, whether requFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈61 tok
1 file · 81 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for bambu-printer-mcp@1.1.76 as of 8d ago. This is the package itself, not its dependencies.