{
  "markdown": "# DechoNet MCP Server\n\nDomain security reconnaissance tools for AI agents via [Model Context Protocol](https://modelcontextprotocol.io).\n\n15 security tools — DNS, SSL, HTTP headers, email auth, port scan, propagation, reverse DNS, ASN/BGP, RDAP/WHOIS, subnet calc, and comprehensive security scan — callable from Claude Desktop and any MCP-compatible AI agent.\n\n**Part of [DechoNet](https://dechonet.com).** Every tool here is also a free web tool at **[dechonet.com](https://dechonet.com)** — no sign-up, no API key — backed by error-fix [guides](https://dechonet.com/guides). This package brings the same checks to AI agents.\n\n## Quick Start (Claude Desktop)\n\nAdd to your `claude_desktop_config.json`:\n\n```json\n{\n  \"mcpServers\": {\n    \"dechonet\": {\n      \"command\": \"npx\",\n      \"args\": [\"-y\", \"dechonet-mcp\"]\n    }\n  }\n}\n```\n\nOr if installed locally:\n\n```json\n{\n  \"mcpServers\": {\n    \"dechonet\": {\n      \"command\": \"node\",\n      \"args\": [\"/path/to/dechonet/mcp/build/index.js\"]\n    }\n  }\n}\n```\n\nConfig file location:\n- **macOS**: `~/Library/Application Support/Claude/claude_desktop_config.json`\n- **Windows**: `%APPDATA%\\Claude\\claude_desktop_config.json`\n\nRestart Claude Desktop. You'll see the DechoNet tools icon in the input area.\n\n## Install\n\n```bash\n# Via npx (no install needed)\nnpx dechonet-mcp\n\n# Or install globally\nnpm install -g dechonet-mcp\n```\n\n## Available Tools\n\n| Tool | Description |\n|------|-------------|\n| `security_scan` | **Comprehensive scan** — 9 checks in parallel, 0-100 Health Score, A-F grade |\n| `dns_lookup` | DNS records + DNSSEC + SPF/DMARC validation |\n| `ssl_check` | SSL/TLS certificate, chain, TLS version, A-F grade |\n| `http_security` | HTTP redirect trace + 10 security headers audit, A-F grade |\n| `email_auth` | SPF, DMARC, DKIM, BIMI, MTA-STS, DANE + blacklist check |\n| `port_scan` | Open TCP ports with service identification |\n| `dns_propagation` | DNS propagation across 8+ global resolvers |\n| `reverse_dns` | PTR record + FCrDNS verification |\n| `asn_lookup` | ASN/BGP network identification + abuse contact |\n| `whois_lookup` | RDAP/WHOIS domain registration data |\n| `ip_info` | Public IP, ISP, ASN, proxy detection |\n| `email_header_analysis` | Email delivery route tracing + auth results |\n| `subnet_calc` | CIDR subnet calculator (offline) |\n\n## Example Prompts\n\nOnce connected, try asking Claude:\n\n- \"Check the security posture of example.com\"\n- \"Is the SSL certificate for mysite.com about to expire?\"\n- \"What DNS records does example.com have?\"\n- \"Scan the open ports on my-server.com\"\n- \"Analyze these email headers: [paste headers]\"\n- \"What's the ASN for 8.8.8.8?\"\n- \"Calculate the subnet for 10.0.0.0/16\"\n\n## SSE Transport (Remote)\n\nFor remote/HTTP-based MCP connections:\n\n```bash\ncd mcp\nnpm run start:sse\n# Server runs on http://localhost:3100\n# SSE endpoint: http://localhost:3100/sse\n```\n\n## Development\n\n```bash\ncd mcp\nnpm install\nnpm run build    # TypeScript → build/\nnpm run dev      # Run with tsx (stdio)\nnpm run start:sse # Run SSE server\n```\n\n## How It Works\n\nThe MCP server calls DechoNet's public API (`https://dechonet.com/api/util/*`) — the same backend as the [dechonet.com](https://dechonet.com) web tools — and returns structured results with:\n- **Status** (ok/warn/bad)\n- **KPIs** (key performance indicators per tool)\n- **Issues** with severity (critical/warning/info) and confidence levels\n- **Actionable remediation steps**\n- **Raw data** (full JSON)\n\nAll data comes from public sources (DNS, HTTP headers, SSL certificates, RDAP). No active exploitation.\n\n## Environment Variables\n\n| Variable | Default | Description |\n|----------|---------|-------------|\n| `DECHONET_URL` | `https://dechonet.com` | API base URL |\n| `DECHONET_LOCALE` | `en` | Response language (`en` or `ko`) |\n| `PORT` | `3100` | SSE server port |\n\n## About DechoNet\n\n[DechoNet](https://dechonet.com) is a domain security reconnaissance platform — distributed observation, cross-verification. The same diagnostics ship three ways: free web tools, error-fix guides, and this MCP server.\n\n- 🌐 **Web tools** (free, no sign-up): https://dechonet.com\n- 📘 **Guides** (fix common DNS/SSL/HTTP/email errors): https://dechonet.com/guides\n- 🐦 **X**: https://x.com/Dechonetwork\n\nMIT licensed. Issues and PRs welcome.\n",
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