lockbox

lockbox is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from sathergate/sathergate-toolkit. Its token cost is not measured, scanned A, original, no licence file.

A local encrypted-secrets tool for Next.js, a framework for building web applications. It protects secret values with AES-256-GCM encryption and does not require a separate vault service.

In plain words
What is it for?
Use it to store and access secrets such as API keys, passwords, or encryption keys in a Next.js application.
Why use it?
It reduces the need to store sensitive values in plain text or operate another secrets-vault system.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Part of the checkup plugin — 1 skill, 1 agent, 8 MCP servers shipped together

One of 7 entries in server.json — they are configured in one file and arrive together.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/sathergate/sathergate-toolkit/checkup-lockbox
Clone the repo
git clone --depth 1 https://github.com/sathergate/sathergate-toolkit

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Or install checkup, the plugin that ships this one along with the rest of its 1 skill, 1 agent, 8 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for lockbox

README.md
[![agentmods](https://agentmods.dev/badge/mcp/sathergate/sathergate-toolkit/checkup-lockbox.svg)](https://agentmods.dev/mcp/sathergate/sathergate-toolkit/checkup-lockbox)
Your own site
<a href="https://agentmods.dev/mcp/sathergate/sathergate-toolkit/checkup-lockbox"><img src="https://agentmods.dev/badge/mcp/sathergate/sathergate-toolkit/checkup-lockbox.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

lockbox scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/checkup/server.json · 10 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Same file

What else server.json configures

This page is one entry in a file that holds 7. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 10 lines scan A 69a2deb1bf4d

Subscribe to this mod's changes

lockbox is an MCP server published in the GitHub repository sathergate/sathergate-toolkit (109 stars, last pushed 22d ago), with no licence file. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.