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isitdns

net.isitdns/isitdns
クラウド・インフラ セキュリティ 公開・接続可能 MCP 2026-07-28

このMCPでできること

Provides live DNS lookups, delegation tracing, resolver monitoring, outage history, DNSSEC checks, and domain configuration audits.

機能

ツール

8 ツール
alias_chain
Follow a CNAME chain
Use when a name is a CNAME and the person asks where it leads. Returns each hop with its target and TTL, and how it ends: addresses, none, a resolver failure, NXDOMAIN (dangling), a loop, or an inside name.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['name'], 'properties': {'name': {'type': 'string', 'description': 'The name to follow, e.g. www.example.com. Also as "domain"; a URL is read as its host.'}}}
check_domain
Check a domain
Use when a domain or website is not working or not resolving (is it DNS?): one call. The first line says whether the name resolves; then the eleven-check audit of its zone, each row ok, warn, fail or skipped and why.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['name'], 'properties': {'from': {'enum': ['north-america', 'europe'], 'type': 'string', 'description': 'Ask from the probe in this region'}, 'name': {'type': 'string', 'description': 'The domain to audit. Also as "domain"; a URL is read as its host.'}}}
dig
dig
Use for one exact question to one public resolver, not as the first call for a site that is not working. Returns records, flags, rcode, EDE and latency; DoH from the edge, or Do53 from a region's probe (from).
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['name'], 'properties': {'cd': {'type': 'boolean', 'default': False, 'description': 'Ask the resolver not to validate'}, 'ecs': {'type': 'string', 'description': 'EDNS Client Subnet, e.g. 192.0.2.0/24'}, 'from': {'enum': ['north-america', 'europe'], 'type': 'string', 'description': 'Ask from the probe in this region'}, 'name': {'type': 'string', 'description': 'The name, e.g. _dmarc.example.com. Also as "domain"; a URL is read as its host.'}, 'nsid': {'type': 'boolean', 'default': False, 'description': 'Request NSID (RFC 5001)'}, 'type': {'type': 'string', 'default': 'A', 'description': 'Record type, e.g. A, MX, TXT, DS, HTTPS, or TYPE<n>'}, 'norec': {'type': 'boolean', 'default': False, 'description': 'Clear RD, like dig +norec'}, 'dnssec': {'type': 'boolean', 'default': True, 'description': 'Set the DO bit and read AD'}, 'family': {'enum': ['v4', 'v6', 'both'], 'type': 'string', 'default': 'v4', 'description': 'Address family to dial'}, 'resolver': {'type': 'string', 'default': 'cloudflare', 'description': 'A board resolver id (cloudflare, google, quad9, opendns, adguard, cleanbrowsing, controld, quad9-unfiltered, adguard-family, cleanbrowsing-family, adguard-unfiltered, opendns-familyshield, nextdns, cloudflare-malware, cloudflare-family, mullvad-base, dns4eu-protective), an alias such as 8.8.8.8, or all for the tier-1 operators side by side.'}}}
dnssec_chain
Walk the DNSSEC chain
Use when a name fails validation or the person asks whether its DNSSEC chain holds. Returns each signed zone cut from the root to the answer and the first link that breaks, or where it goes insecure.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['name'], 'properties': {'name': {'type': 'string', 'description': 'The name, e.g. www.example.com. Also as "domain"; a URL is read as its host.'}, 'type': {'type': 'string', 'default': 'A', 'description': 'The record type to check at the end of the chain'}}}
path_receipt
Path receipt
Use when the person wants proof of what their resolver sends. First call: one dig to run. Second, with the nonce: what we saw (resolver address, UDP/TCP, DO, CD, EDNS size, cookie, ECS, case, arrivals) and the signed TXT.
読み取り専用 外部アクセスあり
入力スキーマ 
{'type': 'object', 'properties': {'nonce': {'type': 'string', 'description': 'From the first call'}}}
registration
Registration status (RDAP)
Use when a domain has vanished from DNS and the person asks whether it expired or is on hold. Returns the registry's RDAP statuses and what each means for resolution, the dates and its nameservers; no contacts.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['domain'], 'properties': {'domain': {'type': 'string', 'description': 'The domain or a hostname under it. Also as "name"; a URL is read as its host.'}}}
sweep_domain
Sweep a domain across its authoritative servers
Use after a zone change, when the person asks whether the authoritative servers agree. Returns each nameserver's answer to each name and type you list, the disagreements, lame or silent servers, and CAA and ACME readiness.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['domain'], 'properties': {'names': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Relative labels to ask, "@" for the apex. Default: @, www, _dmarc, _acme-challenge'}, 'types': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Record types. Default: SOA, NS, A, AAAA, MX, TXT, CAA'}, 'domain': {'type': 'string', 'description': 'The zone or name to sweep, e.g. example.com. Also as "name"; a URL is read as its host.'}}}
trace
Delegation walk
Use when the person wants to walk the delegation for a name, root to authoritative, like dig +trace. Returns each referral and glue, lame or unreachable servers, the final answer and a verdict.
読み取り専用 外部アクセスあり 冪等
入力スキーマ 
{'type': 'object', 'required': ['name'], 'properties': {'name': {'type': 'string', 'description': 'The name to walk. Also as "domain"; a URL is read as its host.'}, 'type': {'type': 'string', 'default': 'A', 'description': 'Record type for the final question'}}}
履歴

最近のツール変更

削除
top_domains
2026年10月1日2:50
削除
resolver_status
2026年10月1日2:50
削除
resolver_history
2026年10月1日2:50
削除
ksk_board
2026年10月1日2:50
削除
dns_events
2026年10月1日2:50
追加
path_receipt
2026年10月1日2:50
変更
registration
2026年10月1日2:50
変更
alias_chain
2026年10月1日2:50
変更
sweep_domain
2026年10月1日2:50
変更
dnssec_chain
2026年10月1日2:50
変更
trace
2026年10月1日2:50
変更
dig
2026年10月1日2:50
変更
check_domain
2026年10月1日2:50
追加
registration
2026年9月29日2:59
追加
alias_chain
2026年9月29日2:59
追加
dnssec_chain
2026年9月29日2:59
変更
ksk_board
2026年9月29日2:59
変更
dns_events
2026年9月29日2:59
変更
top_domains
2026年9月29日2:59
変更
resolver_history
2026年9月29日2:59
変更
resolver_status
2026年9月29日2:59
変更
trace
2026年9月29日2:59
変更
check_domain
2026年9月29日2:59
変更
sweep_domain
2026年9月29日2:59
変更
dig
2026年9月29日2:59
追加
sweep_domain
2026年9月27日2:50
変更
top_domains
2026年9月25日2:59
追加
ksk_board
2026年9月17日12:54
追加
dns_events
2026年9月17日12:54
追加
top_domains
2026年9月17日12:54
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