# WebCrypt MCP server

> Provides AI agents with cryptographic tools for symmetric and asymmetric encryption, digital signatures, and post-quantum security.

- Repository: https://github.com/putervision/webcrypt
- Page: https://hostedmcp.org/servers/putervision/webcrypt
- Transport: stdio
- Stars: 14
- License: MIT
- Latest version: 1.0.1

## Install

### Claude Code

```sh
claude mcp add webcrypt -- npx -y webcrypt
```

### Cursor (`~/.cursor/mcp.json`)

```json
{
  "mcpServers": {
    "webcrypt": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt"
      ]
    }
  }
}
```

### VS Code (`.vscode/mcp.json`)

```json
{
  "servers": {
    "webcrypt": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "webcrypt"
      ]
    }
  }
}
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "webcrypt": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt"
      ]
    }
  }
}
```

### Codex (`~/.codex/config.toml`)

```toml
[mcp_servers.webcrypt]
command = "npx"
args = ["-y", "webcrypt"]
```

### Gemini CLI (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "webcrypt": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt"
      ]
    }
  }
}
```

## FAQ

### Does WebCrypt make external network calls?

No, all cryptographic operations are executed locally in memory using the standard W3C Web Crypto API with zero external API calls or telemetry.

### What encryption algorithms are supported?

It supports AES-256-GCM symmetric encryption, RSA-4096 hybrid public keys, ECDH key agreement, and post-quantum Kyber KEM and Dilithium signatures.