Expo Metro MCP Server
@synnode/expo-metro-mcp
npm
v1.1.1
Published by @synnode — no publish provenance, so origin is unverified, but the source is public: the repository link below is self-declared yet readable, so you can inspect the code before adopting it.
MCP server for Expo/React Native development — live logs, stack trace resolution, runtime evaluation, and simulator/emulator automation via CDP and platform CLIs.
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 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 11 = 89. 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 |
|---|---|
| −10 | capability blast radius (critical) — client exposure if the model is manipulated |
| −1 | publisher verification (public source) — no provenance, but the source is public and inspectable |
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 4
critical Completed toxic-flow trifecta across toolsMTC-FLOW-002
This server (without client built-ins) exposes a complete data-exfiltration chain: get_errors → get_logs → sqlite_exec. Untrusted input is ingested, private data is read, and it can be sent to an external sink via the agent composing the tools (→). Static analysis proves the primitive exists, not that a specific run will occur.
Fix: Remove one leg of the trifecta: isolate untrusted-input tools from secret-reading tools and from egress tools, or require human approval between them.
Location: flow get_errors → get_logs → sqlite_exec
high Tool "sqlite_exec" exposes command/code executionMTC-CAP-001
Tool "sqlite_exec" appears to run shell commands or evaluate code (keyword "exec" in tool name). 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 sqlite_exec
high Shell/command execution in server code (dist/index.js)MTC-SRC-002
In the server's implementation (`dist/index.js:15`): 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: port{execSync as $}from"child_process";import*as M from"fs";import*as we from"os";import*as _e from"path";import{execSyn
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/index.js
low Mutating tool "sqlite_exec" declares no destructiveHintMTC-CAP-005
Tool "sqlite_exec" 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 sqlite_exec
Tools 30
Each tool and what it can reach — statically extracted from the published source.
get_logsingests untrusted inputreads sensitive dataget_errorsingests untrusted inputsqlite_execruns code / shellclear_logsno sensitive capabilityconnectno sensitive capabilitydisconnectno sensitive capabilityevaluateno sensitive capabilityget_statusno sensitive capabilityinput_keyno sensitive capabilityinput_textno sensitive capability
Show 20 more tools ↓
list_devicesno sensitive capabilitymmkv_getno sensitive capabilitymmkv_get_jsonno sensitive capabilitymmkv_keysno sensitive capabilitymmkv_merge_jsonno sensitive capabilitymmkv_removeno sensitive capabilitymmkv_setno sensitive capabilitymmkv_set_jsonno sensitive capabilityreloadno sensitive capabilityresolve_stackno sensitive capabilityscreenshotno sensitive capabilitysqlite_queryno sensitive capabilitysqlite_schemano sensitive capabilitysqlite_tablesno sensitive capabilityswipeno sensitive capabilitytapno sensitive capabilitywatch_logsno sensitive capabilityzustand_persist_getno sensitive capabilityzustand_persist_mergeno sensitive capabilityzustand_persist_setno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
What this scan could not see
- Tools were statically extracted from the published source (30 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 2
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 |
|---|---|---|---|---|
v1.1.1 latest |
B 89/100 | 4 | 1.13.0 | 2026-09-07 |
v1.0.8 |
A 93/100 | 1 | 1.12.1 | 2026-08-19 |
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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