io.github.whois-api-llc/mcp-whoisxmlapi
whoisxmlapi-mcp
32 WHOIS, DNS, IP, threat intelligence, email, and bulk tools for AI agents via WhoisXML API.
alive probed 2026-10-19
32tools
≈ 8.4ktokens, estimate
≈ 4.2 %of Claude's 200k window
5.8×the median server
95 msto initialize
5 msto list tools
- Run it
- npx -y @whoisxmlapidotcom/mcp-whoisxmlapi@1.8.7 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- whoisxmlapi-mcp 1.8.7
- Capabilities
- prompts, resources, tools
- Instructions
- none
- Of a 1M window
- ≈ 0.8 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: invalid x-api-key. The estimate stands in.
- Repository
- https://github.com/whoisxmlapi/mcp-whoisxmlapi
- Registry
- active, updated 2026-09-28 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| reverse_whois_advanced | 850 | 10 % |
| whois | 447 | 5 % |
| whois_history | 443 | 5 % |
| reverse_whois | 422 | 5 % |
| reverse_dns | 390 | 5 % |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- This server is in the heaviest 10 % of the registry. Its 5 most expensive tools are 31 % of the cost. Shorter descriptions, fewer optional parameters and fewer tools cut the cost. The command npx mcpcost --url <endpoint> --tools 50 lists every tool with its cost.
- The Anthropic count_tokens endpoint refused the tool schemas (invalid x-api-key). A client that validates schemas can refuse them too.