2FA SMS API
Protect your customers with SMS security using our SMS two factor auth API.
Secure application access and data protection are more relevant today than ever. SMS two-factor authentication adds an extra layer to your login flow by pairing a password with a code delivered to the user's phone.
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About the Two Factor Authentication integration
Enable two factor authentication via SMS for your application
The touchSMS 2FA API delivers one-time codes over SMS to your users' phones as the second factor in your login, sign-up or high-risk-action flow. You keep control of the code lifecycle and verification logic; we handle the hard part, which is getting the message to the phone reliably, worldwide.
What is SMS two factor authentication?
SMS two-factor authentication (2FA) is a security measure that adds an extra layer of protection to user accounts by requiring users to provide two forms of identification to access their accounts, typically a password plus a short-lived code sent to their mobile phone.
Why use SMS for 2FA?
2FA protects against security threats targeted at user passwords and accounts, such as phishing, brute-force attacks and credential exploitation. SMS reaches 99% of handsets, does not require the user to install anything, and works on every mobile phone in circulation, which makes it the highest-coverage second factor available today.
Is it easy to implement?
Building your own SMS two factor auth solution is no easy task. Let us handle the hard work and use our pre-built API: one call to send the code, one call to verify, and you are done. Documentation, sample code and a sandbox key are available in your touchSMS account.
Trial our 2FA API with 10 free credits
Full access account. No contracts, set up or monthly fees. Talk to us about an integrated solution built around your specific auth flow if the standard endpoint does not fit.
Two Factor Authentication + touchSMS, feature by feature
Pre-built API
Building your own 2FA stack is no easy task. Let us handle the hard work with a documented, production-ready API.
99% delivery
SMS delivers where email cannot, so your login codes actually arrive.
Global reach
Send 2FA codes to Australian, New Zealand and international numbers from one API.
Fast integration
A single POST to send a code, one to verify. Straightforward to slot into any auth flow.
Where teams put it to work
Login 2FA
Send a one-time code as the second factor at login.
Transaction verification
Confirm high-value actions like transfers or password resets with a fresh SMS code.
Sign-up verification
Verify the mobile number a new customer signs up with before granting access.
Connect Two Factor Authentication in minutes
The setup is quick: create your touchSMS account, grab an API key, and follow the prompts in the Two Factor Authentication app. Most teams are sending inside a lunch break.
- 01Create a touchSMS account and add credits.
- 02Get your API key from Settings → API Keys.
- 03Hit POST /v2/messages with the code you generated.
- 04Verify the code your user enters against your own record and grant access.
Two Factor Authentication integration, common questions
Do you generate the codes for me?+
You generate and store the code your side, and use touchSMS to deliver it. This keeps verification logic under your control.
Which regions are supported?+
Australia, New Zealand, and every major international market. Rates vary by destination.
How fast is delivery?+
99% of messages arrive within seconds. Deliverability is monitored 24/7.
Ready to bring SMS into Two Factor Authentication?
10 free credits · no card · cancel anytime