heade.rs
Look up any domain, IP address or AS number: hosting, DNS, registration, email, TLS and headers.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"lookup": {
"url": "https://heade.rs/mcp"
}
}
}Remote endpoints
https://heade.rs/mcpstreamable-httpWhat it can do
Tool inventory
Tools (1)
🟢lookup(query, format)
Look up a domain, IP address or network (AS number) on heade.rs and return its report. For a domain or IP address: where it's hosted (network, BGP prefix, RPKI, location, cloud region, CDN), registration (RDAP/WHOIS), DNS records and DNSSEC, email security (SPF, DMARC, MTA-STS, BIMI), the certificate, a security-header grade and the response headers, the website's tech stack with end-of-life and vulnerability checks, which AI crawlers it lets in and what it offers agents, and open ports from Shodan InternetDB. For an AS number: its prefixes, RPKI and ASPA, upstreams and peers, internet exchanges and registration. Data is live or mirrored within the hour; a lookup takes a few seconds.
Input Schema
{
"type": "object",
"properties": {
"query": {
"type": "string",
"description": "A domain (example.com), IPv4 or IPv6 address (1.1.1.1, 2606:4700::1111), AS number (AS13335) or URL (the hostname is used)."
},
"format": {
"type": "string",
"enum": [
"markdown",
"json"
],
"default": "markdown",
"description": "markdown (the default, about 3,000 tokens for a domain) or json (every field, several times longer)."
}
},
"required": [
"query"
],
"additionalProperties": false
}Community
Evidence