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MCP Server

MCP Server is a JavaScript MCP server that exposes nine phone-number, SMS verification and authenticator-code tools to AI agents over stdio.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

MCP Server — OpenViST project profile in MCP & Tooling.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when an agent workflow needs a short-lived phone number to receive an SMS verification code and return that code to the workflow.

Who it is for

  • Developers configuring an MCP client to give an AI agent access to SMS-based activation tools.
  • Agent builders adding number lookup, ordering and code retrieval to a signup workflow.

Documented uses

  • Find a service by name or URL and inspect available service and country information.
  • Order a number for a selected service and country, then retrieve its SMS verification code.
  • Finish or cancel an activation, request another SMS, check account balance, or generate an RFC 6238 authenticator code locally.
Before you choose

Requirements & limits

The README requires signup to obtain an API key and says the API balance must be funded; it has no free tier. Setup instructions cover Claude Code and JSON-configured clients including Codex, Cursor and Claude Desktop.

  • The server communicates over stdio and exposes nine tools.
  • Service listings include price, live online pool and delivery-rate information; delivery statistics may be null for a service-country pair.
  • The documented number workflow is limited to receiving SMS: numbers do not send messages or take calls.
  • The README says the numbers are not intended for banking, payment or government accounts and describes a 20-minute number lifetime.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Configure the MCP server in Claude Code

Add the SV Number MCP server to Claude Code using an API key.

Before you start

  • Claude Code
  • Node.js tooling to run the package with npx
  • An SVN_API_KEY obtained after signup
  • A funded service balance; the API has no free tier

Steps

  1. Obtain an API key from your profile after signup.

  2. Run the README's Claude Code command with the key supplied as SVN_API_KEY and the package command npx -y sv-number-mcp.

Expected outcome

The server is added to Claude Code's MCP configuration.

Guide limitations

  • This setup guide does not document a verification or activation run.
  • The service requires a funded balance.
Documentation 1 ↗
Source-based practical guide

Add the server to a JSON-configured MCP client

Configure the server in a client that reads an MCP JSON configuration.

Before you start

  • A JSON-configured client such as Codex, Cursor or Claude Desktop
  • Node.js tooling to run the package with npx
  • An SVN_API_KEY obtained after signup
  • A funded service balance; the API has no free tier

Steps

  1. Obtain an API key from your profile after signup.

  2. Add the README's mcpServers entry for sv-number, setting command to npx, args to -y sv-number-mcp, and SVN_API_KEY in env.

Expected outcome

The server entry is present in the client's MCP JSON configuration.

Guide limitations

  • The README documents configuration, not client-specific confirmation steps or a completed activation.
  • The service requires a funded balance.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
14 October 2026
Original website title
sv-number/mcp-server · Official homepage title · retained in its source language
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