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OpenClaw is an open-source personal AI assistant that runs locally on your computer. Install Danube from ClawHub to connect all your tools through MCP.

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Prerequisites

Before starting, ensure you have: 
node --version
openclaw --version

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Setup

1

Install ClawHub

Install the ClawHub CLI tool:
npm i -g clawhub
2

Install Danube Skill

Use ClawHub to install the Danube skill:
clawhub install danube
3

Run Setup Script

The skill includes a setup script that will configure OpenClaw:
bash ~/.clawhub/skills/danube/scripts/setup.sh
When prompted, enter your Danube API key from danubeai.com/dashboard → Settings → API Keys.The script will:
  • Add your API key to ~/.openclaw/.env
  • Configure OpenClaw to use the Danube MCP server
  • Restart the OpenClaw Gateway
You can now use Danube tools through OpenClaw! Try asking:
“List available services on Danube”
“Search for tools that can send emails”

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Alternative: Environment Variable Setup

If ClawHub installation doesn’t work, ensure your API key is set as an environment variable: 
# Add to your shell profile (~/.zshrc or ~/.bashrc)
export DANUBE_API_KEY="dk_your_key_here"

# Reload your shell
source ~/.zshrc  # or ~/.bashrc
Then restart OpenClaw: 
openclaw gateway restart
We recommend using ClawHub for installation as it handles configuration securely. The environment variable approach keeps your API key out of configuration files.

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Available Tools

Once connected, you’ll have access to these Danube MCP tools:
ToolDescription
list_servicesBrowse all available service integrations
search_toolsSemantic search across all available tools
get_service_toolsGet all tools for a specific service
execute_toolRun any tool with parameters
search_skillsSearch the skills marketplace
get_skillGet full skill content and instructions

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Troubleshooting

Check if the skill exists on ClawHub: Visit ClawHub to verify the skill is available.Try installing again:
openclaw skills add danube-mcp
Check OpenClaw logs for error messages.
This usually means your API key is invalid, expired, or not being sent correctly.Common cause: Using ${DANUBE_API_KEY} instead of the actual key value.Fix:
  1. Open ~/.openclaw/openclaw.json
  2. Find the danube skill configuration
  3. Replace "danube-api-key:${DANUBE_API_KEY}" with "danube-api-key:your_actual_key_here"
  4. Use your actual API key value (not an environment variable reference)
  5. Restart: openclaw gateway restart
Verify the key works in Claude Desktop first: If the same key works in Claude Desktop but not OpenClaw, it’s a configuration issue with how the key is being passed.Get a new API key if needed: Visit danubeai.com/dashboard → Settings → API Keys
Verify the API key is set:
echo $DANUBE_API_KEY
Restart OpenClaw:
openclaw gateway restart
Check for configuration errors:
openclaw doctor
Verify Node.js is installed (required for mcp-remote):
node --version  # Should be 18+
Check server availability:
curl https://mcp.danubeai.com/mcp/health
Verify your internet connectionCheck OpenClaw Gateway logs for detailed error messages.

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