Alexa MCP Server
alexa-mcp
npm
v0.4.4
Published by an unidentified publisher — no publish provenance and no public repository, so the publisher could not be verified and the source cannot be independently located.
MCP server and CLI for Alexa devices and smart home control
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 1.2 = 99. What the published surface and source actually contain:
| Points | What was found | Category |
|---|---|---|
| −1.2 | Package runs install-time scripts MTC-SUP-010 | supply-chain |
2. Client adoption risk — 99 − 8 = 91. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
| −2 | publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 7
high Tool "alexa_media_control" exposes command/code executionMTC-CAP-001
Tool "alexa_media_control" appears to run shell commands or evaluate code (parameter "command"). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.
Fix: Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.
Location: tool alexa_media_control
high Shell/command execution in server code (dist/tunnel.js)MTC-SRC-002
In the server's implementation (`dist/tunnel.js:1`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: rt { spawn } from "node:child_process"; const PROXY_PORT = 8080; export async function startTunnel(port = PROXY_PORT) {
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server dist/tunnel.js
medium Hardcoded egress to an external endpoint (dist/auth-flow.js)MTC-SRC-003
In the server's implementation (`dist/auth-flow.js:45`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: nst publicIpRes = await fetch("https://api.ipify.org?format=json"); const publicIp = publicIpRes.ok ? (await publicI
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server dist/auth-flow.js
medium Hardcoded egress to an external endpoint (dist/auth.js)MTC-SRC-003
In the server's implementation (`dist/auth.js:18`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: const tokenRes = await fetch("https://api.amazon.com/ap/exchangetoken/cookies", { method: "POST", heade
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server dist/auth.js
medium Unconstrained command parameter "command" on "alexa_media_control"MTC-CAP-006
Tool "alexa_media_control" takes a command-shaped parameter "command" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.
Fix: Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.
Location: tool alexa_media_control · inputSchema.properties.command
low Mutating tool "alexa_media_control" declares no destructiveHintMTC-CAP-005
Tool "alexa_media_control" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.
Fix: Declare accurate annotations, and gate destructive tools on user confirmation regardless.
Location: tool alexa_media_control
low Package runs install-time scripts (postinstall)MTC-SUP-010
"alexa-mcp" executes postinstall script(s) at install time. An install hook runs at install time; most are routine build/setup, but review what it does before trusting it.
Evidence: patch-package
Fix: Review the scripts; install with --ignore-scripts where possible and vet what they do.
Location: package alexa-mcp
Tools 27
Each tool and what it can reach — statically extracted from the published source.
alexa_media_controlruns code / shellalexa_announceno sensitive capabilityalexa_auth_statusno sensitive capabilityalexa_batch_control_appliancesno sensitive capabilityalexa_batch_control_appliances_customno sensitive capabilityalexa_commandno sensitive capabilityalexa_control_applianceno sensitive capabilityalexa_control_by_groupno sensitive capabilityalexa_control_by_patternno sensitive capabilityalexa_control_groupno sensitive capability
Show 17 more tools ↓
alexa_device_statusno sensitive capabilityalexa_get_brightness_by_nameno sensitive capabilityalexa_get_color_temperature_by_nameno sensitive capabilityalexa_get_volumeno sensitive capabilityalexa_group_membersno sensitive capabilityalexa_list_appliancesno sensitive capabilityalexa_list_audio_groupsno sensitive capabilityalexa_list_device_groupsno sensitive capabilityalexa_list_devicesno sensitive capabilityalexa_list_routinesno sensitive capabilityalexa_now_playingno sensitive capabilityalexa_run_routineno sensitive capabilityalexa_set_brightness_by_nameno sensitive capabilityalexa_set_color_temperature_by_nameno sensitive capabilityalexa_set_volumeno sensitive capabilityalexa_speakno sensitive capabilityalexa_switch_by_nameno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (27 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v0.4.4 latest |
A 91/100 | 7 | 1.13.0 | 2026-09-07 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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