Add labels to fields on a document for signature with C# Client using the API

Make it easier for recipients to complete your document by adding labeled instructions for each field using the airSlate SignNow API. Simplify the process of filling with labels and place them anywhere in the text.

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

Add labels to fillable fields in your document to make it clear which information should be inserted.

Provide your recipient with instructions on what they should place in specific fields.

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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

Evaluate airSlate SignNow's add labels to fields with c client for api

The airSlate SignNow API equips organizations with an exclusive array of features that enhance more efficient business processes. Explore the advantages of our add labels to fields with c client for api by creating a complimentary Sandbox account.

Complete the following steps to establish a Sandbox account:

  1. Navigate to the airSlate SignNow Developers section. There you will find additional information regarding the API and can set up your Sandbox account.
  2. Register for a trial. Enter your email address and click on the Create API sandbox button to sign up.
  3. Verify your email address. Open the email you receive and follow the link to confirm your email address.
  4. Access Developer Sandbox. Create a password to allow continued access to your developer account.
  5. Include an application. Click Add App, assign a name to your app, and click Add to secure changes. The API token for the application will be generated automatically.
  6. Examine add labels to fields with c client for api. Uncover all airSlate SignNow functionalities and how they can enhance your business operations.

Follow these instructions to explore airSlate SignNow's functionalities. Feel free to reach out to the support team if you have any inquiries. Optimize your business workflows with airSlate SignNow today.

How it works

Create an account and get the required tokens
Use code samples to add labels to fields on a document for signature with C# Client using the API
Enjoy the power of eSignature in your 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.

Amazing
5
User in Telecommunications

What do you like best?

The fact that I get to sign a document in a few seconds

Read full review
airSlate SignNow Review
5
Brian Geary

What do you like best?

Ease of use allowing for streamlined use with clients

Read full review
Excellent!
5
Elite Care Staffing Solutions

What do you like best?

Very easy to use and allows for adjusting the sign boxes. Really enjoy it over other signing programs.

Read full review

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