VirtualSMS.io
Real SIM cards for OTP verification — 145+ countries, 2500+ services (WhatsApp, Telegram, Discord). From $0.05/code. API + MCP server for developers and AI agents.
Real SIM cards for OTP verification — 145+ countries, 2500+ services (WhatsApp, Telegram, Discord). From $0.05/code. API + MCP server for developers and AI agents.
This page is designed to help you find out whether VirtualSMS.io is good and if it is the right choice for you.
VirtualSMS is a developer-first SMS verification API that uses real SIM-backed phone numbers, not VoIP. Receive OTP codes for any service that sends SMS — built for signup testing, account verification, 2FA flows, and autonomous AI agent workflows.
/stubs/handler_api.php — migrate by changing only the base URLcomposer require virtualsms/sdk; npm via npx -y virtualsms-mcpFree API key, instant, no credit card. Sign up at virtualsms.io.
Listed in
Countries Supported
145+
Services Supported
2,500+ (WhatsApp, Telegram, Discord, Gmail, social apps)
Number Type
Real SIM cards (not VoIP)
MCP Server
Yes (Model Context Protocol)
x402 Stablecoin Payments
Yes (Base / Polygon / Arbitrum / Optimism)
Webhooks
Yes (async event notifications)
OpenAPI Spec
Yes (v1.1.0, machine-readable)
Auto-Refund
Yes (on failed delivery)
Authentication
API Key (X-API-Key header)
Public Price Endpoint
Yes (no auth required)
CORS Enabled
Yes (browser + AI agents)
Legacy Compatibility
sms-activate-style at /stubs/handler_api.php
Response Format
JSON
VirtualSMS uses real SIM-backed phone numbers, not VoIP — so it works with services that reject VoIP (WhatsApp Business, Telegram bot at scale, banking apps, dating platforms). It's also the only SMS verification API that ships with an MCP server for AI agents and x402 stablecoin payment support — making it the first SMS API designed for both developers and autonomous AI agents.
Three reasons:
Real SIM numbers work where VoIP fails. Most competitors (5SIM, SMS-Activate, SMSPVA) lean heavily on VoIP. That gets blocked by services that matter — WhatsApp Business, banking apps, dating platforms. Our numbers don't.
Built-in MCP server for AI agents. Claude, Cursor, ChatGPT, and any MCP-compatible AI agent can handle phone verification autonomously through our MCP server. No other SMS API in this category ships with this.
Pay-per-use, no contracts, no minimum deposit. From $0.05/code. Free API key. Public price endpoint lets you check pricing before signing up. Auto-refund on failed deliveries. x402 stablecoin payments for international developers who want to skip KYC.
Developers building OTP-dependent workflows: signup testing, QA automation, account verification at scale, and onboarding flows.
Growing segment: AI agent builders using MCP-compatible tools (Claude Code, Cursor, ChatGPT) that need autonomous phone verification capability.
Also: teams migrating from legacy SMS verification providers that no longer meet their needs — either because their suppliers shut down or because their numbers are now blocked as VoIP.
VirtualSMS launched because every SMS verification API on the market was either VoIP-only — rejected by WhatsApp, banking apps, and most major services — or built around legacy plain-text protocols that modern AI agents couldn't use natively.
We started with a modern REST API and real-SIM-backed numbers. We added an MCP server from day one, making us the first SMS verification service designed for both developers and autonomous AI agents. x402 stablecoin payment support followed — removing KYC friction for international developers who'd been priced out of legacy providers.
REST API over HTTPS with OpenAPI 3.1 specification
TypeScript MCP server (Model Context Protocol)
Mintlify-hosted developer documentation
x402 stablecoin payment protocol on Base / Polygon / Arbitrum / Optimism
WebSocket for real-time SMS delivery notifications
Webhook event notifications for async integration
sms-activate-style legacy compatibility endpoint (/stubs/handler_api.php) for drop-in migration
-AI agent platforms integrating our MCP server for autonomous phone verification
-E-commerce QA automation teams testing signup and checkout flows
-Crypto-native developer projects using x402 stablecoin payments
-Developers migrating from sms-activate-style legacy providers
VirtualSMS.io appears to be a functional virtual phone number and SMS verification service that offers a convenient way to receive text messages online, though as with many services in this category, users should verify its current reliability and reputation before committing.
We have collected here some useful links to help you find out if VirtualSMS.io is good.
Check the traffic stats of VirtualSMS.io on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of VirtualSMS.io on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of VirtualSMS.io's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of VirtualSMS.io on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about VirtualSMS.io on Reddit. This can help you find out how popualr the product is and what people think about it.
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