Add signature fields with C# SDK using the API

Add fields for signing using the airSlate SignNow API and collect legal signatures from your signers. Add fields individually for each recipient and customize their size in your document.

  • Free to test
  • Fast to deploy
  • Powerful & secure

Get a typed, printed, drawn or handwritten signature from a recipient by adding signature fields

Allow your recipient to choose the most optimal manner of signing and provide you with their legal signature.

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  • We provide developers with complete SDKs for all popular languages, allowing them to integrate eSignature workflows without writing a single line of code.
  • With our detailed documentation, integrating the airSlate SignNow API is a breeze.
  • The airSlate SignNow API not only provides you with eSignatures: use it to create fillable forms, request payments, and download & archive documents using simple API calls.

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
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.

Check API pricing

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.

GDPR compliance
GDPR compliance
Regulates the use and holding of personal data belonging to EU residents.
SOC 2 Type II Certified
SOC 2 Type II Certified
Guarantees the security of your data & the privacy of your clients.
PCI DSS certification
PCI DSS certification
Safeguards credit/debit card data for every monetary transaction a customer makes.
21 CFR Part 11
21 CFR Part 11
FDA-backed standards for electronic documentation and electronic signatures.
HIPAA compliance
HIPAA compliance
Protects the private health information of your patients.
CCPA compliance
CCPA compliance
Enhances the protection of personal data and the privacy of California residents.

Watch the airSlate SignNow API in action

Try airSlate SignNow's add signature fields with c sdk for api

The airSlate SignNow API provides organizations with an exceptional collection of features that facilitate more efficient business operations. Discover the advantages of our add signature fields with c sdk for api by setting up a complimentary Sandbox account.

To create a Sandbox account, follow these instructions:

  1. Go to the airSlate SignNow Developers page. There, you can obtain additional details regarding the API and set up your Sandbox account.
  2. Register for a trial. Enter your email address and hit the Create API sandbox button to sign up.
  3. Verify your email address. Check your inbox for the email you received and click the link to verify your email address.
  4. Access Developer Sandbox. Create a password to allow further entry into your developer account.
  5. Include an application. Click Add App, assign a name to your app, and then click Add to save your changes. The application’s API token will be generated automatically.
  6. Experiment with add signature fields with c sdk for api. Discover all the features of airSlate SignNow and how they can improve your business operations.

Follow these guidelines to explore airSlate SignNow's features. Feel free to reach out to the support team if you have any queries. Elevate your business workflows with airSlate SignNow now.

How it works

Create an account and access the API Dashboard
Copy required code from the library to add signature fields with C# SDK using the API
Track how your productivity grows with accelerated workflows

Watch our instructions to build custom integrations with ease

airSlate SignNow offers a free testing environment to explore the eSignature.

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.

Great way to be productive from a distance!
5
User in Hospital & Health Care

What do you like best?

airSlate SignNow allows for email invitations to sign documents. I have sent it to individuals who are not tech savvy and they have completed it without an issue!

Read full review
Awesome — must have!!
5
Tanya Benvenuti

What do you like best?

Able to have secure documents even in Covid times. Filling in the fields is awesome.

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Definitely a must for a business especially at times like this
5
Oly Escueta

What do you like best?

I like how its very easy to use. You can make sure it is also organize as you can create folders and title your documents properly. Overall look and its interface is user-friendly. It is very helpful for us at times like this where it needs a lesser person-to-person interaction, you can get your documents signed in a minute and it goes right to your inbox too. For all business especially, working remotely and all the digital platforms this is the answer on your waiting game for unsigned, unread important documents! The bulk sending function is the best, as we have compared it to other similar software, some doesn't allow bulk sending like this but Sign Now has a very generous trial phase to send at least 50 documents per day. We would definitely, use this software again!

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Ready to get started?

FAQs

Below is a list of the most common airSlate SignNow API questions and answers. Just choose a question to view a detailed answer.

Need help? Contact support

Ready to get started?

It’s time to watch the airSlate SignNow API in action. Create your developer account and upload documents, request signatures, and check the status of your document.

Why choose the airSlate SignNow API?:

  • Free to test and easy to deploy
  • SDKs for popular languages
  • Customizable for any workflow
  • Industry-leading security & compliance