Summary
Built for scenarios where you need an LLM agent to authenticate or call APIs without exposing secrets in its context window. Offers three main patterns: vault_add opens a localhost form where you enter credentials that get AES-256-GCM encrypted to disk, vault_login decrypts and autofills them via Chrome DevTools Protocol, and vault_api_request proxies HTTP calls by injecting API keys into headers server-side. The agent only sees success/failure responses, never the actual passwords or tokens. Useful when building autonomous workflows that touch authenticated services like Jira, Stripe, or GitHub without leaking credentials into conversation history or session logs.
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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)
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 headingfields(required) — array of{ name, label, type?, placeholder?, required?, level? }description— optional subtextdestination— named destination from server config; overrides env defaultttl_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
Featured
Fastest browser for AI agents to run web automation tasks, always free.
Download Free life-time →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →