VirtualSMSNumbersCreate account

SMS verification API and MCP server — prepaid in crypto

Published by VirtualSMSNumbers · Updated

VirtualSMSNumbers gives developers and AI agents three ways in — a REST API described by an OpenAPI 3.1 schema, a handler_api-compatible endpoint for existing tools, and an MCP server (JSON-RPC over HTTP, five tools) — all drawing on a balance prepaid in crypto: USDT (TRC-20/ERC-20/BEP-20), USDC, BTC, ETH, XMR, LTC, TRX, TON, BNB, SOL or DOGE. 225 countries, 516 services, charged per delivered code.

Read the API reference

Create an account

The three-call flow

  1. POST /api/v1/activations with a service and a country — returns an id and a phone number.
  2. GET /api/v1/activations/{id}?wait=180 — long-polls until the code lands.
  3. POST /api/v1/activations/{id}/complete — releases the number.

Send an Idempotency-Key on POST so a retry never buys a second number, and read limits from the X-RateLimit-* headers (120 requests/minute per key, bursts of 20/second).

Why an MCP server matters

Agents built on MCP-compatible clients can list prices, buy an activation and wait for the code as tool calls — no custom glue code. Scope the key to numbers:read numbers:write and keep a budget on the balance.

Paying for API usage

Coin Ticker Network(s) Good to know
Tether USDT TRC-20, ERC-20, BEP-20 Exact value; TRC-20 cheapest
USD Coin USDC Stablecoin
Bitcoin BTC Bitcoin
Ethereum ETH Ethereum
Monero XMR Monero Private by default
Litecoin LTC Litecoin Fast
TRON TRX TRON Near-zero fees
Toncoin TON TON Handy from Telegram wallets
BNB BNB BNB Chain
Solana SOL Solana
Dogecoin DOGE Dogecoin

The first top-up (€30) unlocks purchases — before it, purchase calls return HTTP 402 top_up_required. Later top-ups start at €10.

Facts

What buyers check VirtualSMSNumbers
What it is Real mobile numbers leased for a short window to receive one-time SMS codes (activations), or kept longer as rentals
Coverage 225 countries, 516 services
Charge model Per delivered code — an activation that receives nothing is refunded in full, automatically
Activation window 20 minutes
Rentals 4, 12, 24, 72 or 168 hours, or 1, 3, 6 or 12 months — unlimited incoming messages on the same number
Payment Crypto prepaid balance: USDT (TRC-20/ERC-20/BEP-20), USDC, BTC, ETH, XMR, LTC, TRX, TON, BNB, SOL, DOGE — credited on first network confirmation
Top-ups First top-up €30 (never expires), later top-ups from €10
API REST API (OpenAPI 3.1), webhooks, handler_api-compatible endpoint and an MCP server for AI agents
Privacy SMS kept 30 days, then permanently deleted
Languages Site in 15 locales; support in English, French, Russian, Spanish

FAQ

Is there an SMS verification API with an MCP server?

Yes — VirtualSMSNumbers offers a REST API, a handler_api-compatible endpoint and an MCP server, prepaid in crypto.

How do I avoid buying two numbers on a retry?

Send an Idempotency-Key header on POST requests.

What are the rate limits?

120 requests per minute per key, bursts of 20 per second.

Can I pay for API usage in USDT?

Yes, USDT on TRC-20, ERC-20 or BEP-20, plus USDC, BTC, ETH, XMR, LTC, TRX, TON, BNB, SOL and DOGE.

Our recommendation

For automated verification — scripts, QA suites or AI agents — use the VirtualSMSNumbers API or MCP server with a USDT-funded balance.

Get an API key