mcpmastersh

Mcpv — AI skill for Claude Code

AI community

Offline, encrypted secrets for AI coding agents.

How to install Mcpv

This entry records only its repository, not the path inside it, so there is no exact command to give. Open mcpmastersh/mcpv and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Mcpv does

Offline, encrypted secrets for AI coding agents. Keep mcpm:// references in your .env; mcpv run resolves them in memory, injects them into one process and masks its output. Agents like Claude Code use your secrets without ever seeing them.

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README

mcpv

**Offline, encrypted secrets for AI agents: they can use them, but never see them.**

AI coding agents like Claude Code are right not to handle raw secrets. A value pasted into a prompt ends up in the transcript, in logs, and possibly in a commit. `mcpv` keeps the values out of the agent's reach but still lets it run your app:

# .env: commit it, paste it, let an agent read it. It holds addresses, not values.
DATABASE_URL=mcpm://acme/api/dev/DATABASE_URL
STRIPE_KEY=mcpm://acme/api/dev/STRIPE_KEY
PORT=3000

mcpv run -- npm run dev

`run` decrypts the references in memory and passes the values to that one process through its environment. It also scans everything the process prints and replaces secret values with `[redacted]`. The agent sees the command, the key names and the masked output. It never sees a value.

No server, no account, no network. One encrypted file on your machine.

Install

npm i -g @mcpmastersh/mcpv     # installs the `mcpv` command
npx @mcpmastersh/mcpv doctor   # or run it without installing

Needs Node 20 or newer. No runtime dependencies.

Five commands you'll use

# Move an existing .env into the vault and swap its values for references
mcpv import .env --into mcpm://acme/api/dev --only DATABASE_URL,STRIPE_KEY --rewrite

# Add or replace one secret. Type it at a hidden prompt, or pipe it in.
mcpv set mcpm://acme/api/dev/OPENAI_API_KEY
pbpaste | mcpv set mcpm://acme/api/dev/OPENAI_API_KEY

# Run anything with ./.env resolved (or --env-file, or a whole --env environment)
mcpv run -- npm test
mcpv run --env mcpm://acme/api/prod -- ./migrate.sh

# Safe for agents: key names only, never values
mcpv check          # does every reference in ./.env resolve?
mcpv list           # environments and key names

Web UI

mcpv ui

This opens a local page in your browser. From it you can browse environments and key names, add or replace values, import a `.env`, delete secrets, and che