APIVerve

URL Lookup

URLLookup

Read-only

URL Lookup: URL Lookup resolves any web address to its hosting server IP address, country, and continent in real time. Paid plans add city, state, coordinates, timezone, and EU membership status. (Cost: 10 credits)

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "URLLookup"
  }
}

Input Schema

Name	Required	Description	Default
`url`	Yes	The URL to lookup the location of. Include the https protocol

Output Schema

Name	Required	Description
`data`	No
`error`	No	Error message, null on success
`status`	No	"ok" on success

Schema Changelog

Changes observed during successful MCP inspections.

First observedNov 7, 2026

TDQS

A3.5/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds valuable behavioral context beyond annotations: real-time resolution, the specific data fields returned, paid-plan extensions, and a cost of 10 credits.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences and front-loads the core resolution behavior. It is efficient, though the opening 'URL Lookup: URL Lookup' is redundant and the parenthetical cost could be integrated more cleanly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is simple with one parameter, an output schema, and annotations covering safety. The description supplies the missing behavioral context—returned fields, real-time nature, paid tiers, and cost—making it sufficiently complete for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, and the single url parameter is already described with an example and protocol guidance. The description does not add syntax or format details beyond what the schema provides, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource: resolves a web address to hosting server IP, country, and continent. It is clear what the tool does, though it does not explicitly distinguish itself from sibling lookup tools like IPLookup or DNSLookup.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains the tool's function but gives no guidance on when to use it versus alternatives. There are no exclusions, prerequisites, or named sibling tools to help an agent choose correctly.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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