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Signet AI

by Signet-AI · Signet-AI/signetai

Local-first vault for agent secrets — agents reference secret names, not values; values never leave your machine.

Signet keeps the model honest: agent prompts reference secrets by name; Signet resolves them at call time inside tools. This prevents accidental secret leakage into model context and provider logs.

Why use it

Key features

Live Demo

What it looks like in practice

ready

Install

Pick your client

~/Library/Application Support/Claude/claude_desktop_config.json  · Windows: %APPDATA%\Claude\claude_desktop_config.json
{
  "mcpServers": {
    "signet-ai-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/Signet-AI/signetai"
      ],
      "_inferred": true
    }
  }
}

Open Claude Desktop → Settings → Developer → Edit Config. Restart after saving.

~/.cursor/mcp.json · .cursor/mcp.json
{
  "mcpServers": {
    "signet-ai-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/Signet-AI/signetai"
      ],
      "_inferred": true
    }
  }
}

Cursor uses the same mcpServers schema as Claude Desktop. Project config wins over global.

VS Code → Cline → MCP Servers → Edit
{
  "mcpServers": {
    "signet-ai-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/Signet-AI/signetai"
      ],
      "_inferred": true
    }
  }
}

Click the MCP Servers icon in the Cline sidebar, then "Edit Configuration".

~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "signet-ai-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/Signet-AI/signetai"
      ],
      "_inferred": true
    }
  }
}

Same shape as Claude Desktop. Restart Windsurf to pick up changes.

~/.continue/config.json
{
  "mcpServers": [
    {
      "name": "signet-ai-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/Signet-AI/signetai"
      ]
    }
  ]
}

Continue uses an array of server objects rather than a map.

~/.config/zed/settings.json
{
  "context_servers": {
    "signet-ai-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/Signet-AI/signetai"
        ]
      }
    }
  }
}

Add to context_servers. Zed hot-reloads on save.

claude mcp add signet-ai-skill -- git clone https://github.com/Signet-AI/signetai

One-liner. Verify with claude mcp list. Remove with claude mcp remove.

Use Cases

Real-world ways to use Signet AI

Keep credentials out of model context

👤 Claude Code users ⏱ ~15 min intermediate

When to use: You're shipping an agent that touches APIs and don't want raw keys in prompts.

Flow
  1. Vault keys
    Signet vault add STRIPE_KEY.✓ Copied
    → Saved
  2. Reference
    Tool spec references $STRIPE_KEY.✓ Copied
    → Wired
  3. Run
    Agent never sees the value.✓ Copied
    → Safe call

Outcome: Tools call APIs without leaking secrets into prompts.

Combinations

Pair with other MCPs for X10 leverage

signet-ai-skill + claude-code-safety-net

Layer secret-hygiene with destructive-op guards

Combine signet-ai-skill with claude-code-safety-net: Layer secret-hygiene with destructive-op guards✓ Copied

Tools

What this MCP exposes

ToolInputsWhen to callCost
vault add / list / resolve (see docs) Three flows 1 call

Cost & Limits

What this costs to run

API quota
N/A
Tokens per call
0
Monetary
Free OSS
Tip
Rotate vaulted secrets like you would in any vault

Security

Permissions, secrets, blast radius

Minimum scopes: secrets-read secrets-write
Credential storage: OS keychain
Data egress: None
Never grant: put plaintext secrets in skills/configs

Troubleshooting

Common errors and fixes

Resolution fails

Confirm the secret name; case-sensitive

Alternatives

Signet AI vs others

AlternativeWhen to use it insteadTradeoff
1Password CLIYou already have 1PasswordNot agent-aware

More

Resources

📖 Read the official README on GitHub

🐙 Browse open issues

🔍 Browse all 400+ MCP servers and Skills