WhisperGraph MCP server

WhisperGraph MCP Server

The internet's infrastructure graph for AI agents - 46B nodes and edges mapping DNS, IPs, ASNs, BGP, WHOIS, Web links and threat intel. Sign up programmatically in 2 HTTP calls.

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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>" }
    }
  }
}

MCP clients (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" }
    }
  }
}

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

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:

Shortened. The full README is on GitHub.