WhisperGraph

WhisperGraph is an MCP server backed by the world's largest internet-infrastructure graph database — 46 billion nodes and edges across 20 entity types, mapping every domain, IP, ASN, prefix, organization, Web link and threat-intelligence listing into a single Cypher-queryable graph. Used by security teams, incident responders, and AI agents for investigation, attribution, brand protection, and infrastructure forensics.

Built for agents from day one.

• Programmatic signup in 2 HTTP calls. No browser, no CAPTCHA, no human-in-the-loop. Email verification only. Working API key in ~5 seconds.

• Free trial for everyone, including agents. Paid tiers for higher quotas.

What you can ask:

• DNS: resolution, nameservers, MX, SPF chains, DNSSEC

• Routing: ASN ownership, BGP origin history, MOAS conflicts, peering

• Hosting & ownership: registrar, WHOIS contacts, organization mapping

• Threat intel: ~40 feeds across 18 categories, CALL explain() for full threat scoring

• Historical: WHOIS history, BGP route changes

• Web: 10.9B hyperlinks for inter-domain analysis

Learn more: Agent signup · WhisperGraph intro · Cypher API reference · Query guide · Cypher syntax · Functions · Best practices · MCP setup

Quick start

You need a WhisperGraph API key. Get one either:

• Programmatically (recommended for agents) — see Agent quickstart below.

• Via the dashboard (recommended for humans) — console.whisper.security/sign-up.

Hosted remote server (no install)

Whisper runs a hosted MCP server at https://mcp.whisper.security. Point any MCP client that supports remote servers at it and authenticate with your API key:

{
  "mcpServers": {
    "whisper": {
      "url": "https://mcp.whisper.security",
      "headers": { "Authorization": "Bearer <your_api_key>" }
    }
  }
}

Claude Desktop / Claude Code / Cursor (stdio)

For local stdio transport, add this to your MCP client config:

{
  "mcpServers": {
    "whisper-graph": {
      "command": "npx",
      "args": ["-y", "@whisper-security/whisper-graph-mcp"],
      "env": { "WHISPER_API_KEY": "your-api-key" }
    }
  }
}

Or with Claude Code:

claude mcp add whisper-graph -e WHISPER_API_KEY=your-api-key -- npx -y @whisper-security/whisper-graph-mcp

Self-hosting this repo is for teams who want to run the MCP layer in their own environment. See How to set up.

Related MCP server: Lookup-Domain

Agent quickstart

Get a working API key in two HTTP calls — no browser, no CAPTCHA, no waiting list.

Step 1 — start signup (Whisper emails a verification code):

POST https://console.whisper.security/api/signup
Content-Type: application/json

{"email":"your-agent@example.com","attribution":{"agent_name":"your-agent","source":"<registry-name>"}}

Step 2 — verify with the emailed code:

POST https://console.whisper.security/api/signup/verify
Content-Type: application/json

{"signup_id":"...","code":"..."}

The response contains api_key, mcp_url, dashboard_url, and docs_url. Use api_key in the MCP config snippet above. Full docs: whisper.security/docs/agent-signup.

Tools

All six tools are read-only.

Resources

Six MCP resources: the full schema, the relationship map, a Cypher function reference, a query cookbook, plus live whisper://stats and whisper://quota.

Prompts

Eight investigation-workflow prompt templates: investigate-ip, map-attack-surface, compare-domains, blast-radius, threat-triage, whois-pivot, bgp-investigation, typosquat-sweep.

Self-hosting (Docker / HTTP)

For remote or team deployments, run the server over Streamable HTTP:

docker run -p 8080:8080 -e MCP_TRANSPORT=http \
  ghcr.io/whisper-sec/whisper-graph-mcp:latest

Or with Docker Compose:

docker compose up

In HTTP mode the server does not authenticate inbound requests — it relays the caller's X-API-Key or Authorization: Bearer header to the hosted WhisperGraph API, falling back to the WHISPER_API_KEY environment variable when no header is present. Put it behind your own gateway if you need access control.

Configuration

All configuration is via environment variables.

Development

npm install
npm run dev       # run from source over stdio
npm test          # unit + integration tests (no secrets needed)
npm run build     # bundle to dist/
npm run lint      # eslint
npm run typecheck # tsc --noEmit

Contributing

Contributions are welcome. See CONTRIBUTING.md and our Code of Conduct. Security issues: see SECURITY.md.

License

Apache-2.0. "Whisper", the Whisper logo, and "WhisperGraph" are trademarks of Whisper Security — see NOTICE.