1password (takescake) MCP Server
@takescake/1password-mcp
npm
v4.0.2
Source verified
Published by cakerepository — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
MCP server for 1Password service accounts — tools, prompts, and resources for vault and credential management
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 − 6 = 94. 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 |
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 6
high Tool "op_run" exposes command/code executionMTC-CAP-001
Tool "op_run" 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 op_run
high Shell/command execution in server code (dist/config.js)MTC-SRC-002
In the server's implementation (`dist/config.js:4`): 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: ecFileSync } from "node:child_process"; import { LOG_LEVEL_VALUES } from "./types.js"; export const SERVER_NAME = "1pass
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/config.js
high Shell/command execution in server code (dist/tools/op-run.js)MTC-SRC-002
In the server's implementation (`dist/tools/op-run.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"; import { z } from "zod"; import { getClient } from "../client.js"; import { getC
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/tools/op-run.js
medium Unconstrained command parameter "command" on "op_run"MTC-CAP-006
Tool "op_run" 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 op_run · inputSchema.properties.command
medium Unconstrained command parameter "shell" on "op_run"MTC-CAP-006
Tool "op_run" takes a command-shaped parameter "shell" 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 op_run · inputSchema.properties.shell
low Mutating tool "op_run" declares no destructiveHintMTC-CAP-005
Tool "op_run" 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 op_run
Tools 15
Each tool and what it can reach — statically extracted from the published source.
op_runruns code / shellitem_archiveno sensitive capabilityitem_deleteno sensitive capabilityitem_editno sensitive capabilityitem_getno sensitive capabilityitem_listno sensitive capabilityitem_lookupno sensitive capabilitynote_createno sensitive capabilityop_check_refno sensitive capabilitypassword_createno sensitive capability
Show 5 more tools ↓
password_generateno sensitive capabilitypassword_generate_memorableno sensitive capabilitypassword_readno sensitive capabilitypassword_updateno sensitive capabilityvault_listno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (15 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 3
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 |
|---|---|---|---|---|
v4.0.2 latest |
A 94/100 | 6 | 1.13.0 | 2026-09-07 |
v4.0.1 |
A 94/100 | 6 | 1.13.0 | 2026-08-31 |
v2.5.0 |
A 93/100 | 1 | 1.12.1 | 2026-07-29 |
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.
npx mcptrustchecker scan @takescake/1password-mcp --onlineOther implementations of 1password 1
Independent packages implementing the same tool, scanned with the same engine. Compare all 2 side by side →
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