hackerdogs/dharma-mcp repository overview

⁠

⁠Dharma MCP Server

MCP server wrapper for Dharma⁠ — Grammar-based test case generation for fuzzing.

⁠What is Dharma?

Dharma (dharma) is a security tool that provides: Grammar-based test case generation for fuzzing.

See MozillaSecurity/dharma⁠ for full documentation.

No API keys required — Dharma runs locally inside the Docker container.

Summary. MCP server wrapper for Dharma⁠ — Grammar-based test case generation for fuzzing.

Tools:

• run_dharma — Run dharma with the given arguments. Returns structured JSON output.

⁠Tools Reference

⁠run_dharma

Run dharma with the given arguments. Returns structured JSON output.

{
  "raw": "dharma output will appear here"
}

⁠Example Prompts

Here are example prompts you can use with Claude (or any MCP client) when this tool is connected:

• "Run dharma with --help to see all available options."
• "Use dharma to scan the target 192.168.1.1."
• "What options does dharma support? Show me its help output."
• "Run dharma against example.com with default settings."
• "Execute dharma with verbose output enabled."
• "Use the dharma tool to analyze the target and report findings."

⁠Deploy

⁠Docker Compose (recommended)

docker-compose up -d

⁠Docker Run (stdio mode)

docker run -i --rm hackerdogs/dharma-mcp:latest

⁠Docker Run (HTTP streamable mode)

docker run -d -p 8334:8334 \
  -e MCP_TRANSPORT=streamable-http \
  -e MCP_PORT=8334 \
  hackerdogs/dharma-mcp:latest

⁠MCP Client Configuration

⁠Stdio mode (default)

Add to your Claude Desktop or Cursor MCP config:

{
  "mcpServers": {
    "dharma-mcp": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "-e", "MCP_TRANSPORT", "hackerdogs/dharma-mcp:latest"],
      "env": {
        "MCP_TRANSPORT": "stdio"
      }
    }
  }
}

⁠HTTP mode (streamable-http)

First, start the server using Docker Compose or docker run with HTTP mode (see Deploy⁠ above), then point your MCP client at the running server:

{
  "mcpServers": {
    "dharma-mcp": {
      "url": "http://localhost:8334/mcp"
    }
  }
}

⁠Environment Variables

⁠Installing in Hackerdogs

The fastest way to get started is through Hackerdogs⁠:

1. Log in to your Hackerdogs account.
2. Go to the Tools Catalog.
3. Search for the tool by name (e.g. "nuclei", "naabu", "julius").
4. Expand the tool card and click Install — you're ready to go.

1. Vendor API key required? Add your key in the config environment variable field before clicking Install. Your key will be encrypted at rest.
2. Enable / Disable the tool anytime from the Enabled Tools page.
3. Need to update a key or parameter? Go to My Tools → toggle Show Decrypted Values → edit → Save.

⁠Build

docker build -t hackerdogs/dharma-mcp:latest .

⁠Testing

⁠Automated tests

./test.sh

⁠Test directly with Docker

1. Start the server in HTTP mode:

docker run -d --rm --name dharma-mcp-test -p 8334:8334 \
  -e MCP_TRANSPORT=streamable-http \
  hackerdogs/dharma-mcp:latest

2. Initialize the MCP session:

SESSION_ID=$(curl -s -D - -X POST http://localhost:8334/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"test","version":"0.1"}}}' \
  2>&1 | grep -i mcp-session-id | awk '{print $2}' | tr -d '\r\n')

curl -s -X POST http://localhost:8334/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "mcp-session-id: $SESSION_ID" \
  -d '{"jsonrpc":"2.0","method":"notifications/initialized"}'

3. Call a tool:

curl -s -X POST http://localhost:8334/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "mcp-session-id: $SESSION_ID" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"run_dharma","arguments":{"arguments":"--help"}}}'

4. Clean up:

docker stop dharma-mcp-test

⁠Running the tool directly (bypassing MCP)

You can run the dharma CLI in the same container by overriding the entrypoint to generate fuzzing grammars without starting the MCP server.

Show help:

docker run -i --rm --entrypoint dharma hackerdogs/dharma-mcp:latest -h