Domain registry records and status, DNS records, and IP/ASN resolution over RDAP and DoH.
Connect Runs on your machine
claude mcp add whois-mcp-server -e MCP_LOG_LEVEL=<MCP_LOG_LEVEL> -e RDAP_TIMEOUT_MS=<RDAP_TIMEOUT_MS> -e DOH_TIMEOUT_MS=<DOH_TIMEOUT_MS> -e RDAP_MAX_RETRIES=<RDAP_MAX_RETRIES> -e DOH_MAX_RETRIES=<DOH_MAX_RETRIES> -- npx -y @cyanheads/[email protected]{
"mcpServers": {
"whois-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/[email protected]"
],
"env": {
"MCP_LOG_LEVEL": "<MCP_LOG_LEVEL>",
"RDAP_TIMEOUT_MS": "<RDAP_TIMEOUT_MS>",
"DOH_TIMEOUT_MS": "<DOH_TIMEOUT_MS>",
"RDAP_MAX_RETRIES": "<RDAP_MAX_RETRIES>",
"DOH_MAX_RETRIES": "<DOH_MAX_RETRIES>"
}
}
}
}{
"mcpServers": {
"whois-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/[email protected]"
],
"env": {
"MCP_LOG_LEVEL": "<MCP_LOG_LEVEL>",
"RDAP_TIMEOUT_MS": "<RDAP_TIMEOUT_MS>",
"DOH_TIMEOUT_MS": "<DOH_TIMEOUT_MS>",
"RDAP_MAX_RETRIES": "<RDAP_MAX_RETRIES>",
"DOH_MAX_RETRIES": "<DOH_MAX_RETRIES>"
}
}
}
}{
"servers": {
"whois-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@cyanheads/[email protected]"
],
"env": {
"MCP_LOG_LEVEL": "<MCP_LOG_LEVEL>",
"RDAP_TIMEOUT_MS": "<RDAP_TIMEOUT_MS>",
"DOH_TIMEOUT_MS": "<DOH_TIMEOUT_MS>",
"RDAP_MAX_RETRIES": "<RDAP_MAX_RETRIES>",
"DOH_MAX_RETRIES": "<DOH_MAX_RETRIES>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
MCP_LOG_LEVELOptional | Sets the minimum log level for output (e.g., 'debug', 'info', 'warn'). |
RDAP_TIMEOUT_MSOptional | HTTP timeout for RDAP requests in milliseconds. |
DOH_TIMEOUT_MSOptional | HTTP timeout for DNS-over-HTTPS requests in milliseconds. |
RDAP_MAX_RETRIESOptional | Max retry attempts on transient RDAP failures. |
DOH_MAX_RETRIESOptional | Max retry attempts on transient DNS-over-HTTPS failures. |
Details
| Package | @cyanheads/[email protected] (NPM, stdio) |
| Package | @cyanheads/[email protected] (NPM, streamable-http) |
| First published | 11 Nov 2026 |
| Last updated | 11 Nov 2026 |
| Registry name | io.github.cyanheads/whois-mcp-server |
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