OpenClaw - Danube

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.

Prerequisites

Before starting, ensure you have:

OpenClaw installed - Follow the OpenClaw setup guide
Node.js 18+ - Required for mcp-remote bridge

node --version
openclaw --version

Setup

Install ClawHub

Install the ClawHub CLI tool:

npm i -g clawhub

Install Danube Skill

Use ClawHub to install the Danube skill:

clawhub install danube

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”

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.

Available Tools

Once connected, you’ll have access to these Danube MCP tools:

Tool	Description
`list_services`	Browse all available service integrations
`search_tools`	Semantic search across all available tools
`get_service_tools`	Get all tools for a specific service
`execute_tool`	Run any tool with parameters
`search_skills`	Search the skills marketplace
`get_skill`	Get full skill content and instructions

Troubleshooting

Skill not installing

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.

401 Unauthorized errors

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:

Open ~/.openclaw/openclaw.json
Find the danube skill configuration
Replace "danube-api-key:${DANUBE_API_KEY}" with "danube-api-key:your_actual_key_here"
Use your actual API key value (not an environment variable reference)
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

Tools not appearing

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+

Connection issues

Check server availability:

curl https://mcp.danubeai.com/mcp/health

Verify your internet connectionCheck OpenClaw Gateway logs for detailed error messages.

​Prerequisites

​Setup

​Alternative: Environment Variable Setup

​Available Tools

​Troubleshooting

​Resources

Prerequisites

Setup

Alternative: Environment Variable Setup

Available Tools

Troubleshooting

Resources