SMS verification: frequently asked questions
How quickly can you buy a number on OTPDrop?
OTPDrop is balance-funded: buying a number debits the account's balance and issues it instantly — no address, no waiting. A short balance refuses the order outright rather than creating one that can never be paid off.
Does OTPDrop require KYC?
OTPDrop requires no KYC: no email address, password or identity document at any stage, and no field in the database for a customer name. Collecting nothing is the design rather than a setting.
How do you pay for an OTPDrop account?
With a top-up: pick an amount and a coin, and it gets its own address from a pre-generated pool and shows the exact amount to send. Your balance is credited once the deposit confirms on the network, plus a bonus at higher amounts. Confirmation is not instant — it depends on the coin and the network.
What happens if you close the tab before paying a top-up?
Nothing is lost. The top-up and its address stay exactly where they were — find it again in your deposits history at /account, countdown still running.
What happens after you buy a number?
Buying debits the price from your balance and issues the number in the same step — no address, no waiting. If the code never arrives, cancel the order before it does and the price is refunded straight back to your balance.
What happens if the SMS verification code never arrives?
Cancel the order before the code arrives and the price is refunded to your balance. You only pay for a delivered code.
What is the difference between a one-time number and a rental?
A one-time number is for a single service and one SMS, then it is done. Rental keeps the same number for 7–90 days for unlimited incoming SMS from every service.
Which cryptocurrencies does OTPDrop accept?
Top-ups are crypto-only. Available coins are listed on the account top-up form and as badges in the site footer.
How many services does OTPDrop support?
OTPDrop lists 133 SMS-verification services.
How many countries does OTPDrop cover?
OTPDrop covers 197 countries.
How many service and country combinations does OTPDrop price?
26201 (service, country) pairs carry a live price.
Does OTPDrop have an API for AI agents?
Yes — a JSON-RPC MCP server at /mcp (OTPDrop's MCP server implements protocol version 2025-06-18, stateless.), with tools to create an account, fund it with a top-up, buy a number, and read back its status and SMS code, plus /.well-known/agent.json, /openapi.json, and /llms.txt.
Does OTPDrop have a REST API?
Yes. The same operations are available as ordinary JSON endpoints at /api/v1, authenticated with an "Authorization: Bearer <seed>" header. It is a translation of the MCP tools, so REST and MCP behave identically — see /api for the full reference.
Can a virtual number be used more than once?
A one-time number is released back to the pool after its order finishes, so it is not yours to reuse. If you need the same number again later — because the service will ask you to re-verify it — rent one instead: a rental holds the number for 7 to 90 days.
Which country should you choose for SMS verification?
Match the number to how the account will actually be used. Services restrict signups by region, and an account whose language and activity point at one country but whose number sits in another is an obvious anomaly. Where you have a free choice, a country the service already serves in volume usually goes through more smoothly.
What if the service rejects the virtual number?
Some platforms decline numbers from ranges they associate with verification services, and nothing arrives because nothing was sent. That costs you nothing: an order with no SMS is refunded automatically. Cancel and try a different country — if two countries fail in a row, that service is likely blocking virtual numbers broadly.
Can you withdraw an OTPDrop balance to a wallet?
No. Refunds and unused credit stay on your OTPDrop balance and are spent on further orders. Accounts are anonymous, so we have no way to establish that a withdrawal request comes from the person who funded the account. Fund only what you intend to spend.
Do you need an email address to use OTPDrop?
No. An account is a seed phrase generated for you and shown once. There is no email, no password and no identity document at any stage — and no recovery either, so store the phrase before you leave the page.
How do you receive an SMS verification code without a phone number?
Rent a virtual number: it is a real number that delivers incoming SMS to a web page instead of a handset. On OTPDrop you create an account, fund it in crypto, buy a number for the service you are verifying with, and read the code on the order page. Nothing is installed and no SIM is involved.
Which SMS verification service should you choose?
It depends on what you are protecting. Choose OTPDrop when you do not want to be identified — no email, no documents and crypto-only payment mean there is nothing collected to leak. Choose an older or card-accepting provider if a long track record or paying without holding crypto matters more. OTPDrop publishes its own comparisons, including where rivals win, at /vs.
Can you pay for a virtual phone number with Monero?
Yes. OTPDrop accepts Monero alongside twelve other coins and networks. Monero is the one worth choosing if privacy is the point: Bitcoin and Ethereum leave a permanent public record linking the payment to whoever funded the wallet, while Monero hides sender, receiver and amount at the protocol level.
Is it legal to use a virtual number for SMS verification?
Renting a number to receive a message is ordinary and lawful in most places. What differs is the agreement with the service you are verifying with: many platforms prohibit virtual numbers in their own terms, so using one may breach that contract even where it breaks no law. That judgement is yours to make.
Will an account be banned for using a virtual number?
It can be, and no provider can promise otherwise. The risk rises when the number is from a country that matches nothing else about the account, when the number has verified someone else before, or when the account behaves unusually straight after signup. The more common loss is quieter: a disposable number is released, the service later asks you to re-verify it, and the account becomes unreachable. Renting a number avoids that.
Can an AI agent buy a phone number on its own?
Yes. OTPDrop exposes an MCP server with twelve tools and an equivalent REST API at /api/v1, so an agent can create an account, fund it in crypto, buy a number and read the code with no human in the loop. There is no signup form to fill, no identity check to pass and no payment card to hold.
What is the cheapest way to get an SMS verification code?
A one-time number, if you never need the number again — OTPDrop prices start at $0.25 and an order that receives no code is refunded automatically. Renting costs more up front but is cheaper overall when a service will ask you to re-verify the same number later, because a lost account costs more than either.