toolgrep / Developer productivity
isitdns
Free DNS diagnostics with a public resolver status board, browser dig, and an MCP server.
isitdns is a free DNS diagnostics service. It monitors 16 public DNS resolvers from 3 probes and displays their status on a web board. Tools include a domain check, dig, delegation trace, DNSSEC chain check, resolver comparison, nameserver consistency check, CAA check, _acme-challenge check, DNS change check, and SERVFAIL diagnosis. Results are available via web UI, HTTP endpoints (curl, /check, /dig routes, OpenAPI spec), DNS TXT records, and an MCP server with tools like check_domain, dig, trace, dnssec_chain, sweep_domain, and registration. No ads, no login, no API key.
- Category
- Developer productivity
- Pricing
- free
- Free tier
- yes
- API
- yes
- MCP server
- yes
- SDK
- no
- Open source
- unknown
Listed 2026-10-28 · last verified 2026-10-28 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.85
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API
curl https://toolgrep.com/api/products/isitdns