Electronic Signature
Developers
Features
API for eSignature Solutions
Enable two-factor signer authentication via the API | airSlate SignNow API

Enable two-factor signer
authentication via the API

Ensure only authorized users can access eSigning sessions embedded in your application. Implement dual-factor authentication to verify signers via SMS, a direct phone call, or secret password.

Free to test
Fast to deploy
Powerful & secure

Configure dual-factor authentication to protect your embedded signing sessions

The airSlate SignNow API strengthens your document security by warding off unauthorized users. While setting up your integrated eSignature invite, all you need to do is incorporate an authentication parameter in the request body, define the preferred authentication method, and specify validation credentials.

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airSlate SignNow provides developers with complete SDKs for every popular language, allowing them to integrate eSignatures without writing a single line of code.
With airSlate SignNow’s detailed documentation, integrating electronic signatures with your app is a breeze.
airSlate SignNow goes beyond eSignatures. Use it to create fillable forms, request payments, and manage your documents securely using simple API calls.

View full API reference

Choose a signer authentication method that fits into your workflow

SMS verification

Send an SMS with a personalized message and unique password. Signers will be required to enter the password you shared with them via SMS to access a signing session inside your application.

Phone call verification

Provide a relevant phone number and your signer will receive a phone call prior to gaining access to an embedded signing session. The signer passes authentication once they pick up the phone call.

Password protection

Create a secret password for accessing an embedded signing session and share it discreetly with your signers. They will have to enter the password to complete the verification and access your document.

Enhance the security of your integrated signing experiences with two-factor authentication

Improved security & compliance

Confirm the identity of users before they can sign documents within your application. Reduce the risk of fraudulent activities and ensure your app complies with the highest data security regulations.

Personalized user experience

Customize the two-factor authentication process with personalized messages using the airSlate SignNow API. This not only adds an extra layer of security but also enhances the user experience by making the process more engaging and intuitive.

Easy and quick implementation

All you need to set up dual-factor authentication via the API is add a few lines of code while configuring your embedded eSignature invite.

airSlate SignNow regularly wins awards for ease of use and setup

Read our reviews on the trusted resources

Tech Data uses airSlate SignNow to improve our internal and external customer service while increasing our speed to revenue.

Bob Dutkowsky | CEO

Select an API package for your business

Integrate eSignatures into your software and get 250 legally-binding signature invites with your API free trial.

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Solution engineers

We are here to help you configure eSignature API to your workflow.

Review airSlate SignNow’s API documentation

The detailed API tutorial will guide you through the entire integration process and provide clear coding examples.

Video guides

Watch our video guides for instructions on how to easily build custom integrations.

Start with any of our SDKs

Get complete SDKs for Node.js, Python,
PHP, Java, C#.

Enterprise-grade security and compliance

airSlate SignNow is committed to protecting your sensitive information by complying with global industry-specific security standards.

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GDPR compliance

Regulates the use and holding of personal data belonging to EU residents.

SOC 2 Type II Certified

Guarantees the security of your data & the privacy of your clients.

PCI DSS certification

Safeguards credit/debit card data for every monetary transaction a customer makes.

21 CFR Part 11

FDA-backed standards for electronic documentation and electronic signatures.

HIPAA compliance

Protects the private health information of your patients.

CCPA compliance

Enhances the protection of personal data and the privacy of California residents.

Watch the airSlate SignNow API in action

Start building your eSignature integration with a quick video guide

Watch the video tutorial to kick-start your project.

Trusted eSignature solution — what our customers are saying

Explore how the airSlate SignNow eSignature platform helps businesses succeed. Hear from real users and what they like most about electronic signing.

This service is really great! It has helped...

5

anonymous

This service is really great! It has helped us enormously by ensuring we are fully covered in our agreements. We are on a 100% for collecting on our jobs, from a previous 60-70%. I recommend this to everyone.

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I've been using airSlate SignNow for years (since it...

5

Susan S

I've been using airSlate SignNow for years (since it was CudaSign). I started using airSlate SignNow for real estate as it was easier for my clients to use. I now use it in my business for employement and onboarding docs.

Read full review

Everything has been great, really easy to incorporate...

5

Liam R

Everything has been great, really easy to incorporate into my business. And the clients who have used your software so far have said it is very easy to complete the necessary signatures.

Read full review