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Zerocreds-com

Vault MCP

by Zerocreds-com
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zerocreds-mcp

MCP server for ZeroCreds — collect credentials from users without exposing them to the LLM.

How it works

Claude                    ZeroCreds Server            User
  │                            │                        │
  ├─zerocreds_create_session──►│                        │
  │◄─{ token, url }────────────┤                        │
  │                            │                        │
  │  "Please fill: <url>"──────────────────────────────►│
  │                            │◄──── form submit ───────┤
  │                            │  (credentials saved)    │
  │                            │                        │
  ├─zerocreds_check_status─────►│                        │
  │◄─{ status: "done" }────────┤                        │
  │                            │                        │
  │  (proceeds — never saw the credentials)

Related MCP server: Coffer MCP

Setup

npm install -g zerocreds-mcp

Add to ~/.claude/mcp.json (Claude Code) or Claude Desktop config:

{
  "mcpServers": {
    "zerocreds": {
      "command": "zerocreds-mcp",
      "env": {
        "ZEROCREDS_URL": "https://zerocreds.ru",
        "ZEROCREDS_TOKEN": "your-admin-or-integrator-token",
        "ZEROCREDS_DEFAULT_DESTINATION": "local-dev",
        "ZEROCREDS_TG_BOT_TOKEN": "optional — sends link via Telegram",
        "ZEROCREDS_TG_CHAT_ID": "optional"
      }
    }
  }
}

Environment variables

Variable

Required

Description

ZEROCREDS_URL

no

Server URL (default: https://zerocreds.ru)

ZEROCREDS_TOKEN

yes

Admin or integrator token

ZEROCREDS_DEFAULT_DESTINATION

no

Default destination name (default: local-dev)

ZEROCREDS_TG_BOT_TOKEN

no

Telegram bot token — auto-sends the link

ZEROCREDS_TG_CHAT_ID

no

Telegram chat ID

Tools

zerocreds_create_session

Creates a one-time form session. Returns { token, url, expires_at }.

Claude shows url to the user, then polls zerocreds_check_status every 5–10 seconds.

Parameters:

  • title (required) — form heading

  • fields (required) — array of { name, label, type?, placeholder?, required?, level? }

  • description — optional subtext

  • destination — named destination from server config; overrides env default

  • ttl_minutes — link expiry (default: 30)

Field types: text, password, email, tel, number, textarea, url

Field levels (optional, shown to user as privacy indicator): secret · pii · attribute · credential

zerocreds_check_status

Polls session status. Returns { status: "pending" | "done" | "expired" }.

Example agent flow

User: "Log me into GitHub"

Claude: [zerocreds_create_session]
  title: "Connect GitHub"
  fields: [
    { name: "token", label: "Personal Access Token", type: "password" }
  ]
→ { token: "abc123", url: "https://zerocreds.ru/f/abc123" }

Claude: "Please fill in your token here: https://zerocreds.ru/f/abc123"

[polls zerocreds_check_status every 5s]
→ { status: "done" }

Claude: "GitHub connected! Proceeding..."
[reads token from secret store via configured destination]

Self-hosting

See zerocreds-server to run your own instance.

License

MIT

Tool Schema Changelog

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