Sigsci Server

MCP server implementation for the Signal Sciences (Fastly NGWAF) API.

日本語版はこちら → README.ja.md

Implements the Code execution with MCP approach to minimize context consumption from tool definitions.

Features

• Progressive Disclosure: Dynamically discover and load only the tools you need
• 40+ API tools: Read-only corp/site APIs supported
• Type-safe: Fully typed with TypeScript
• MCP compliant: Built on the Model Context Protocol SDK

Usage

Configure for Cursor / Claude Desktop

• Add to ~/.cursor/mcp.json or claude_desktop_config.json:

{
  "mcpServers": {
    "sigsci-mcp-server": {
      "command": "npx",
      "args": ["-y", "https://github.com/yuki777/sigsci-mcp-server"],
      "env": {
        "SIGSCI_EMAIL": "[email protected]",
        "SIGSCI_TOKEN": "your-api-token"
      }
    }
  }
}

Available Tools

Corp tools

Tool	Description
sigsci_list_corps	List corporations
sigsci_get_corp	Get corporation details
sigsci_get_corp_report	Get attack report
sigsci_list_corp_activity	List corp activity events
sigsci_list_corp_users	List corp users
sigsci_get_corp_user	Get corp user details
sigsci_list_corp_rules	List corp rules
sigsci_get_corp_rule	Get corp rule details
sigsci_list_corp_tags	List corp signal tags
sigsci_get_corp_tag	Get corp signal tag details
sigsci_list_corp_lists	List corp lists
sigsci_get_corp_list	Get corp list details
sigsci_list_corp_integrations	List corp integrations
sigsci_get_corp_integration	Get corp integration details
sigsci_list_cloudwaf_instances	List CloudWAF instances
sigsci_list_cloudwaf_certs	List CloudWAF certificates

Site tools

Tool	Description
sigsci_list_sites	List sites
sigsci_get_site	Get site details
sigsci_list_site_activity	List site activity events
sigsci_list_site_members	List site members
sigsci_get_site_member	Get site member details
sigsci_list_site_rules	List site rules
sigsci_get_site_rule	Get site rule details
sigsci_list_templates	List rule templates
sigsci_get_template	Get rule template details
sigsci_list_configured_templates	List configured templates
sigsci_get_configured_template	Get configured template details
sigsci_list_site_tags	List site signal tags
sigsci_get_site_tag	Get site signal tag details
sigsci_list_site_lists	List site lists
sigsci_get_site_list	Get site list details
sigsci_list_alerts	List alerts
sigsci_get_alert	Get alert details
sigsci_search_requests	Search requests
sigsci_get_request	Get request details
sigsci_get_request_feed	Get request feed
sigsci_list_events	List events
sigsci_get_event	Get event details
sigsci_list_suspicious_ips	List suspicious IPs
sigsci_list_rate_limited_ips	List rate-limited IPs
sigsci_get_whitelist	Get whitelist
sigsci_get_blacklist	Get blacklist
sigsci_list_agents	List agents
sigsci_get_agent	Get agent details
sigsci_list_top_attacks	List top attacks
sigsci_get_timeseries	Get timeseries data

Meta tools (for Progressive Disclosure)

Tool	Description
sigsci_search_tools	Search tools by keyword
sigsci_list_tool_categories	List tools by category

Using Progressive Disclosure

This MCP server implements Anthropic’s recommended Code execution with MCP approach.

Problems with traditional MCP

1. Tool definitions consume context: Preloading all definitions costs many tokens
2. Redundant intermediate results: API responses can flood context as-is

How this server addresses them

1. On-demand tool discovery: Use sigsci_search_tools and sigsci_list_tool_categories to find only what you need
2. Control detail level: detailLevel lets you choose name-only/with descriptions/full definitions
3. Tool definitions as resources: Access tool definition files as MCP resources

Example

// 1. Check categories first
await sigsci_list_tool_categories({ detailLevel: "name" });

// 2. Search for the needed tools
await sigsci_search_tools({ keyword: "request", detailLevel: "description" });

// 3. Call only the needed tools
await sigsci_search_requests({
  corpName: "my-corp",
  siteName: "my-site",
  q: "tag:XSS",
});

Development

# Dev mode (watch)
npm run dev

# Build
npm run build

# Lint
npm run lint

# Test
npm test

License

MIT

References

• Signal Sciences API Documentation
• Anthropic: Code execution with MCP
• Model Context Protocol