@kapilraghuwanshi/dev-tools-mcp

Zero-config MCP server for developers. No API keys. No secrets. Just plug it in.

22+ tools across encoding, hashing, DNS, IP geolocation, SSL, URL tracing, WHOIS, npm lookups, GitHub, and more.

Quick Start

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (Mac) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "devtools": {
      "command": "npx",
      "args": ["@kapilraghuwanshi/dev-tools-mcp"]
    }
  }
}

Restart Claude Desktop — all tools are immediately available.

Claude Code (CLI)

claude mcp add @kapilraghuwanshi/dev-tools-mcp -- npx @kapilraghuwanshi/dev-tools-mcp

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "devtools": {
      "command": "npx",
      "args": ["@kapilraghuwanshi/dev-tools-mcp"]
    }
  }
}

GitHub Copilot (VS Code)

Add to .vscode/mcp.json in your workspace:

{
  "servers": {
    "devtools": {
      "type": "stdio",
      "command": "npx",
      "args": ["@kapilraghuwanshi/dev-tools-mcp"]
    }
  }
}

Windsurf

Add to ~/.windsurf/mcp.json:

{
  "mcpServers": {
    "devtools": {
      "command": "npx",
      "args": ["@kapilraghuwanshi/dev-tools-mcp"]
    }
  }
}

Tools

🔵 Compute — offline, instant

| Tool | What it does | |------|-------------| | dt_encode_decode | Base64, URL, HTML encode/decode | | dt_hash_string | MD5, SHA1, SHA256 hashing | | dt_generate_uuid | Generate 1–20 UUID v4s or NanoIDs | | dt_parse_jwt | Decode JWT header + payload (no verification) | | dt_diff_text | Line-by-line diff of two strings | | dt_convert_case | camelCase ↔ snake_case ↔ kebab-case ↔ PascalCase ↔ CONSTANT_CASE | | dt_format_json | Pretty-print or minify JSON | | dt_regex_test | Test a regex pattern, return all matches & groups | | dt_color_convert | HEX ↔ RGB ↔ HSL color conversion | | dt_timestamp_convert | Unix ↔ ISO ↔ UTC + relative time | | dt_url_parse | Break URL into protocol, host, path, params, hash | | dt_generate_password | Secure random password generator | | dt_unit_converter | Convert bytes (KB, MB, GB) and temperature (C, F, K) | | dt_lorem_ipsum | Generate placeholder text (words, sentences, paragraphs) | | dt_format_sql | Basic SQL query formatter |

🌐 Network — public APIs, no auth needed

| Tool | What it does | |------|-------------| | dt_my_ip | Your public IP address | | dt_ip_info | Geo, ISP, ASN, timezone for any IP | | dt_dns_lookup | A, AAAA, CNAME, MX, TXT, NS, SOA records | | dt_http_trace | Follow redirect chain — where does this URL go? | | dt_http_headers | Inspect all HTTP response headers of any URL | | dt_ssl_check | SSL cert expiry, issuer, SANs, days remaining | | dt_port_check | Is TCP port X open on host Y? | | dt_whois_lookup | Domain registration details, expiry, registrar |

📦 Lookup — developer ecosystem

| Tool | What it does | |------|-------------| | dt_npm_info | Package version, downloads, license, deps | | dt_github_repo | Stars, forks, language, topics, license | | dt_gitignore_gen | Generate .gitignore for any stack via gitignore.io | | dt_caniuse | MDN browser compatibility lookup |

Example Prompts

Hash this string with SHA256: "my-secret-key"
Parse this JWT and tell me when it expires
Convert "getUserById" to snake_case
Where does https://bit.ly/3xyz redirect?
Check if port 443 is open on github.com
What's the SSL cert expiry for stripe.com?
Get the npm info for the "zod" package
Generate a .gitignore for node, react, and macos
Look up the MX records for gmail.com
Convert hex color #ff6b6b to HSL
WHOIS lookup for github.com

Requirements

• Node.js 18+
• No API keys or configuration needed

☁️ Remote Deployment (SSE)

You can host this server on Render (100% Free Tier).

1. Render.com (Recommended Free Tier)

1. Fork this repo and connect it to a new Render Web Service.
2. Set the Root Directory to src/devtools.
3. Set the Build Command to npm install && npm run build.
4. Set the Start Command to node dist/index.js.
5. Add a PORT environment variable: 10000.
6. Once deployed, connect your client using your Render URL:

"devtools-remote": {
  "type": "sse",
  "url": "https://mcp-servers-161f.onrender.com/sse"
}

Note: Free tier servers "sleep" after 15 mins of inactivity. The first request after a break may take 30s to wake up.

2. Manual SSE Run

PORT=3000 npx @kapilraghuwanshi/dev-tools-mcp

License

MIT © Kapil Raghuwanshi