Disposable Phone Check Skill

Overview

Disposable Phone Number Checker uses an up-to-date database of known disposable phone numbers from SMS receiving services. This helps identify temporary numbers often used for spam, fraud, or bypassing verification systems.

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as DisposablePhoneCheckSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

Tool call

{
  "name": "DisposablePhoneCheckSkill",
  "arguments": {
    "phone": "+12085813945"
  }
}

You do not name the tool yourself; the model picks it. Asking about +12085813945 in the terms this skill covers is enough for it to reach for DisposablePhoneCheckSkill on its own — naming it explicitly also works, and is the way to force the call.

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

Argument	Type	Description
`phone`Required	string	The phone number to check in E.164 format (e.g., +12085813945) phone

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "phone": "+12085813945",
    "isDisposable": true,
    "firstSeen": "2024-01-30"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`phone`	string	`+12085813945`	The phone number that was checked
`isDisposable`	boolean	`true`	Whether the phone number is a known disposable/temporary number
`firstSeen`	string	`2024-01-30`	Date the number was first seen on a disposable list, null if not listed

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

A call costs 6 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

User Registration: Detect and block disposable phone numbers during user registration to prevent fake accounts and improve user quality
Fraud Prevention: Identify temporary phone numbers used in fraudulent activities and protect your platform from abuse
SMS Verification: Ensure SMS verification codes are sent to real phone numbers, not temporary ones that can be easily abandoned
Lead Quality: Filter out leads with disposable phone numbers to focus on genuine prospects and improve conversion rates

Other ways to use Disposable Phone Check Skill

Set up Disposable Phone Check Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →

Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →

Pages that use this skill:

Block fake signupsGuides