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Get Passive DNS by IP

An MCP tool from the Cloudflare API server, hosted on mcp.hjlabs.in.

Get Passive DNS by IP Gets a list of all the domains that have resolved to a specific IP address. [GET /accounts/{account_id}/intel/dns]

Name on the gateway: cloudflare_api__passive_dns_by_ip_get_passive_dns_by_ip · read-only.

Parameters

Name	Type	Description
`account_id` required	`string`	account_id parameter
`start_end_params`	`object`	start_end_params parameter
`ipv4`	`string`	ipv4 parameter
`page`	`number`	Requested page within paginated list of results.
`per_page`	`number`	Maximum number of results requested.

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments

{
  "name": "cloudflare_api__passive_dns_by_ip_get_passive_dns_by_ip",
  "arguments": {
    "account_id": "…"
  }
}

Or connect the Cloudflare API server directly, which lists 3,127 tools including this one:

Run in your terminal

claude mcp add --transport http hj-cloudflare-api https://mcp.hjlabs.in/mcp/cloudflare-api \
  --header "Authorization: Bearer YOUR_API_KEY"

Use the get passive dns by ip tool with account_id set to ….