DNS lookup | agent view
The same page content and links, with explicit tool capabilities. Tools marked with an API can run directly through HTTP. Other tools require the browser interface or are not connected yet.
Tool capabilities
{
"id": "dns-lookup",
"category": "network-tools",
"built": true,
"requirements": "A AAAA MX TXT CNAME NS SOA records with resolver and time; distinguish authoritative and cached answers.",
"implementation": {
"fields": [
{
"key": "record",
"label": "Record type",
"value": "A",
"type": "select",
"values": [
"A",
"AAAA",
"MX",
"TXT",
"NS",
"CNAME",
"SOA"
]
}
],
"processing": "Server required",
"note": "Uses the local diagnostic server to contact the supplied public host or DNS/RDAP provider. Only public internet addresses are permitted; requests time out and redirects are bounded.",
"experience": {
"automatic": false,
"single": true,
"label": "Domain name",
"placeholder": "happytails.ai",
"help": "Enter one domain name without https://, a path or a port.",
"action": "Check domain"
},
"mode": "explicit",
"interactive": false
},
"execution": "POST /api/v1/tools/dns-lookup/run",
"api": {
"id": "dns-lookup",
"name": "DNS lookup",
"category": "network-tools",
"description": "A AAAA MX TXT CNAME NS SOA records with resolver and time.",
"notes": "Uses the local diagnostic server to contact the supplied public host or DNS/RDAP provider. Only public internet addresses are permitted; requests time out and redirects are bounded.",
"human_path": "/en/network-tools/dns-lookup/",
"method": "POST",
"endpoint": "/api/v1/tools/dns-lookup/run",
"schema_url": "/api/v1/tools/dns-lookup",
"input_schema": {
"type": "object",
"additionalProperties": false,
"properties": {
"input": {
"type": "string",
"maxLength": 1000000,
"default": "",
"description": "Plain text input. File tools use files instead unless otherwise documented."
},
"options": {
"type": "object",
"additionalProperties": false,
"properties": {
"record": {
"type": "string",
"description": "Record type",
"default": "A",
"enum": [
"A",
"AAAA",
"MX",
"TXT",
"NS",
"CNAME",
"SOA"
]
}
}
}
}
},
"output_schema": {
"type": "object",
"required": [
"tool",
"result"
],
"properties": {
"tool": {
"type": "string"
},
"result": {
"type": "object",
"required": [
"text",
"files"
],
"properties": {
"text": {
"type": [
"string",
"null"
]
},
"data": {
"description": "Parsed JSON when the textual result is JSON."
},
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"files": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"mime",
"bytes",
"base64"
],
"properties": {
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"bytes": {
"type": "integer"
},
"base64": {
"type": "string",
"contentEncoding": "base64"
}
}
}
}
}
}
}
},
"processing": "Server; contacts public network services",
"limits": {
"request_bytes": 8388608,
"input_characters": 1000000,
"files_bytes": 5242880,
"max_files": 0,
"timeout_seconds": null
}
},
"agent_processing": "Server; contacts public network services",
"browser_agent": {
"supported": true,
"name": "run_current_tool",
"discovery": "WebMCP on the human page in a supporting browser",
"verification": "See audit/API-AUDIT.md; availability is not verification"
}
}Page guide
A AAAA MX TXT CNAME NS SOA records with resolver and time.
How to use DNS lookup
- Enter a domain name in the input field.
- Review the settings, then choose Check domain.
- Review the result, then use Copy result or a download link when available.
Working with dns lookup
A network lookup is a snapshot from a particular resolver, location and time. DNS answers, routing paths and certificates can change, so a result is most useful when the query and observation time are clear.
Common questions
Why do DNS results differ between locations?
Resolvers can cache records for different periods, and some services deliberately return location-specific answers. A mismatch does not on its own identify a configuration fault.
Can browser code perform every network check?
Browsers restrict arbitrary network access. Some diagnostics need a server or a public service; that service’s observation point affects what the result means.