PluginBench
MCP Server
Active
Apache-2.0

Kaval MCP Server

io.github.LufeMC/kaval

RepositoryRegistry

What is the Kaval MCP server?

Verify the facts an agent's action depends on before it acts — ALLOW, REVIEW, or BLOCK.

How to install Kaval

Copy-paste configuration for popular MCP clients.

transport: stdio
Config generated by PluginBench — verify against the source before use.
Environment / auth
  • KAVAL_API_KEY
    required
    secret

    Bring-your-own Kaval bearer key (kv_live_…). Create one at https://usekaval.com.

  • KAVAL_BASE_URL

    Point at a self-hosted or staging Kaval API instead of the hosted one. Defaults to https://api.usekaval.com.

Claude Desktop
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "kaval": {
      "command": "npx",
      "args": [
        "-y",
        "@usekaval/mcp"
      ],
      "env": {
        "KAVAL_API_KEY": "<YOUR_KAVAL_API_KEY>",
        "KAVAL_BASE_URL": "<YOUR_KAVAL_BASE_URL>"
      }
    }
  }
}
Cursor
~/.cursor/mcp.json
{
  "mcpServers": {
    "kaval": {
      "command": "npx",
      "args": [
        "-y",
        "@usekaval/mcp"
      ],
      "env": {
        "KAVAL_API_KEY": "<YOUR_KAVAL_API_KEY>",
        "KAVAL_BASE_URL": "<YOUR_KAVAL_BASE_URL>"
      }
    }
  }
}
Windsurf
~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "kaval": {
      "command": "npx",
      "args": [
        "-y",
        "@usekaval/mcp"
      ],
      "env": {
        "KAVAL_API_KEY": "<YOUR_KAVAL_API_KEY>",
        "KAVAL_BASE_URL": "<YOUR_KAVAL_BASE_URL>"
      }
    }
  }
}
VS Code
.vscode/mcp.json
{
  "servers": {
    "kaval": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@usekaval/mcp"
      ],
      "env": {
        "KAVAL_API_KEY": "<YOUR_KAVAL_API_KEY>",
        "KAVAL_BASE_URL": "<YOUR_KAVAL_BASE_URL>"
      }
    }
  }
}
Claude Code
claude mcp add kaval --env KAVAL_API_KEY=<YOUR_KAVAL_API_KEY> --env KAVAL_BASE_URL=<YOUR_KAVAL_BASE_URL> -- npx -y @usekaval/mcp

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