phoneLookup

Returns carrier, line type and portability details for a phone number, with optional country. For format and validity checks only use /validatephone.

SERVERAPI Ninjas SOURCEhttps://mcp.api-ninjas.com/mcp

Low RISK CLASS

Category Read

Parameters 21 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-api-ninjas-mcp/phonelookup.md

WHAT IT DOES

What phoneLookup does on API Ninjas

AI agents call phoneLookup to retrieve information from API Ninjas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`number`	string	Yes	Phone number to look up. The leading '+' is optional. If country is not set, include the country code (e.g. 12065550100 or +12065550100).
`country`	string	—	2-letter ISO-3166 country code the phone number belongs to.

Parameters from the server's own tool schema.

RISK

Why phoneLookup is rated Low

Even though phoneLookup only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs phoneLookup safely

PolicyLayer is an MCP gateway: it sits between your AI agents and API Ninjas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For phoneLookup, this is the rule to start with:

phoneLookup Allowed

phoneLookup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "phoneLookup": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect API Ninjas, apply this rule, and every phoneLookup call is checked against it from then on.

FAQ

Questions about phoneLookup

What does the phoneLookup tool do? +

Returns carrier, line type and portability details for a phone number, with optional country. For format and validity checks only use /validatephone. It is categorised as a Read tool in the API Ninjas MCP Server, which means it retrieves data without modifying state.

What parameters does phoneLookup accept? +

phoneLookup accepts 2 parameters: number, country. Required: number. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on phoneLookup? +

Register the API Ninjas MCP server in PolicyLayer and add a rule for phoneLookup: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches API Ninjas. Nothing to install.

What risk level is phoneLookup? +

phoneLookup is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit phoneLookup? +

Yes. Add a rate_limit block to the phoneLookup rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block phoneLookup completely? +

Set action: deny in the PolicyLayer policy for phoneLookup. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides phoneLookup? +

phoneLookup is provided by the API Ninjas MCP server (https://mcp.api-ninjas.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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