Toolbox MCP Service

Gongju.dev now fully supports Model Context Protocol (MCP). With simple configuration, you can let Claude Desktop, Cursor, or other AI assistants directly use multiple core tools from this site.

📦 Available Tools

After configuration, your AI assistant will gain the following capabilities:

Tool Name	Description
mcp_watermark	Image Watermark: Add custom text watermark to images (supports Base64/URL).
mcp_image_base64	Image Base64: Convert Image URL to Base64, or decode Base64 string.
ip_lookup	IP Lookup: Query geolocation, ISP, ASN, etc. for any IP address.
dns_lookup	DNS/Whois: Query DNS records (A, MX, NS) and Whois registration info.
ssl_check	SSL Check: Check website SSL certificate status, validity, and HTTP headers.
meta_fetch	Meta Fetch: Scrape Title, Description, Keywords, and OG tags from webpages.
headers_analyze	Headers Analysis: Fetch and analyze HTTP response headers.
cron_parse	Cron Parse: Parse cron expression, get description and next execution times.
cron_build	Cron Build: Build cron expression from individual field values.
random_username	Random Username: Generate random usernames in Chinese or English with various styles.
random_password	Random Password: Generate secure random passwords with customizable length and character types.

🚀 Quick Start (Claude Desktop)

Just add the following configuration to your Claude Desktop config file (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "gongju-toolbox": {
      "command": "npx",
      "args": [
        "-y",
        "@ivotoby/openapi-mcp-server",
        "--openapi-spec",
        "https://api.gongju.dev/openapi-mcp.json",
        "--api-base-url",
        "https://api.gongju.dev"
      ]
    }
  }
}

Please restart Claude Desktop after configuration.

💡 Usage Examples

You can talk to AI naturally like this:

"Check where the IP 8.8.8.8 is located."

"Add a watermark 'Confidential' to this image at the bottom right."

"Check how long until google.com's SSL certificate expires."

"Get all Meta tags from https://example.com."

"Parse this cron expression '0 9 * * 1-5' and tell me what it means."

"Generate a cron expression that runs every day at 8 AM."

"Generate 10 English usernames with numbers."

"Create some cool Chinese usernames for me."

"Generate a 20-character strong password with special symbols."

"Create 5 secure passwords, exclude ambiguous characters."

🖼️ Image Watermark Tool Demo

Although MCP is designed for AI, you can also try the image watermark feature directly here: