Electronic Signature
Developers
Features
API for eSignature Solutions
Embed eSignature workflows into your app or website with C# Client for API

Embed eSignature workflows into your app or website with C# Client using the API

Streamline document approval and allow your customers to manage documents in the most convenient way. With signNow’s API, they can embed eSignature workflows into a workspace they’re already familiar with.

Free to test
Fast to deploy
Powerful & secure

Allow customers to manage and eSign documents from anywhere

Use the sample code to embed an eSignature workflow into a third party app or website and make it accessible even to non-signNow users.

Node.js

C#

Java

Python

cURL

Copy code

'use strict';
 
const signnow = require('@signnow/api-client')({
  credentials: 'BASE64_ENCODED_CLIENT_CREDENTIALS',
  production: true, // if false then uses eval server
});
const sendInvite = signnow.template.invite;
 
const id = 'TEMPLATE_ID_GOES_HERE';
const token = 'YOUR_ACCESS_TOKEN';
 
/**
 * @typedef {Object} SignerSettings
 * @property {string} email - signer's email
 * @property {string} role - ole name
 * @property {number} order - role signing order
 * @property {string} reassign - allow reassign signer
 * @property {string} decline_by_signature - signer can decline invite
 * @property {number} reminder - remind via email in days
 * @property {number} expiration_days - expiration of invite in days
 * @property {string} [subject] - specify subject of email
 * @property {string} [message] - specify body of email
 */
 
/**
 * @type {Object}
 * @property {string} document_id
 * @property {SignerSettings[]} to - array of signers
 * @property {string} from - email of sender
 * @property {string[]} [cc] - array with emails
 * @property {string} [subject] - specify subject of email
 * @property {string} [message] - specify body of email
 * @property {string} [on_complete] - on signing complete action
 */
const fieldInvite = {
  document_id: 'TEMPLATE_ID_GOES_HERE',
  to: [
    {
      email: 'EMAIL_OF_SIGNER',
      role: 'Signer 1',
      order: 1,
      reassign: '0',
      decline_by_signature: '0',
      reminder: 4,
      expiration_days: 27,
      subject: 'Field invite Signer1',
      message: 'Message',
    },
  ],
  from: 'EMAIL_OF_SENDER',
};
 
/**
 * @param {Object} res
 * @param {string} res.status - e.g. 'success'
 */
const handleResponse = res => {
  console.log(res);
};
 
const handleError = err => {
  console.error(err);
};
 
sendInvite({
  data: {
    ...fieldInvite,
  },
  id,
  token,
}, (err, res) => {
  if (err) {
    handleError(err);
  } else {
    handleResponse(res);
  }
});

public class SendInviteModel
    {
        public IEnumerable<To> to { get; set; }
        public string from { get; set; }
        public object[] cc { get; set; }
        public string subject { get; set; }
        public string message { get; set; }
    }
 
    public class To
    {
        public string email { get; set; }
        public string role_id { get; set; }
        public string role { get; set; }
        public int order { get; set; }
        public string authentication_type { get; set; }
        public string password { get; set; }
        public int expiration_days { get; set; }
        public int reminder { get; set; }
        public string method { get; set; }
        public string phone { get; set; }
    }
public partial class RestSharpSamples
    {
        public static void SignatureInviteFromTemplate(string accessToken, string apiUrl, string templateId, SendInviteModel dataObj, string documentName = "", bool disableEmail = false)
        {
            var client = new RestClient { BaseUrl = new Uri(apiUrl) };
 
            var createDocumentrequest = new RestRequest("/template/" + templateId + "/copy", Method.POST)
                .AddHeader("Accept", "application/json")
                .AddHeader("Authorization", "Bearer " + accessToken);
 
            if (!string.IsNullOrEmpty(documentName))
            {
                createDocumentrequest.RequestFormat = DataFormat.Json;
                createDocumentrequest.AddBody(new { document_name = documentName });
            }
 
            var createDocumentResponse = client.Execute(createDocumentrequest);
 
            if (createDocumentResponse.StatusCode != HttpStatusCode.OK)
            {
                throw new Exception($"Can't create document from template. {createDocumentResponse.Content}");
            }
 
            var document = JsonConvert.DeserializeObject<CreateResponseModel>(createDocumentResponse.Content);
 
            var disable = (disableEmail) ? "?email=disable" : "";
            var request = new RestRequest("/document/" + document.id + "/invite" + disable, Method.POST)
                .AddHeader("Accept", "application/json")
                .AddHeader("Authorization", "Bearer " + accessToken);
 
            request.RequestFormat = DataFormat.Json;
            request.AddBody(dataObj);
 
            var response = client.Execute(request);
            if (response.StatusCode != HttpStatusCode.OK)
            {
                throw new Exception($"Cannot send invite. {response.Content}");
            }
        }
    }

import signnow_python_sdk

if __name__ == '__main__':
    signnow_python_sdk.Config(client_id="CLIENT_ID",
                              client_secret="CLIENT_SECRET",
                              environment="production")

# Enter your own credentials
    username = "USER_NAME"
    password = "USER_PASSWORD"
    template_id = "TEMPLATE_ID"

# Create access_token for the user
    access_token = signnow_python_sdk.OAuth2.request_token(username, password, '*')

to = [{
        "email": "testemail@signnow.com",
        "role_id": "",
        "role": "Signer 1",
        "order": 1
    }]

invite_payload = {
        "to": to,
        "from": username
    }

# Create a document from the template
    doc_id = signnow_python_sdk.Template.copy(access_token['access_token'], template_id, "New Doc From Template")

# Get document data
    document_data = signnow_python_sdk.Document.get(access_token['access_token'], doc_id['id'])

# Send signature invite
    invite_response = signnow_python_sdk.Document.invite(access_token['access_token'], doc_id['id'], invite_payload)

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 signNow API is a breeze.
The signNow API not only provides you with eSignatures: use it to create fillable forms, request payments, and download & archive documents using simple API calls.

View full API reference

signNow regularly wins awards for ease of use and setup

Read our reviews on the trusted resources

Tech Data uses 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 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#.

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

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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.

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Protects the private health information of your patients.

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

Watch the signNow API in action

Get started with uninterrupted eSignature API: embed eSignature workflows into your app or website with C# Client using the API

Consolidate and streamline your eSignature workflows and establish seamless processes. Try the signNow API, implement eSignature workflows into your custom apps and websites in minutes, and seamlessly embed eSignature workflows into your app or website with C# Client using the API.

Embed eSignature workflows into your app or website with C# Client using the API the signNow API for uninterrupted eSignature API

Click API on the signNow main page and create your API Sandbox account.
Open your email to confirm the registration and specify a password for accessing your Developer Sandbox environment.
Find the list of your apps at the top of the page. By default, you can also find a Test App for testing the API.
Click its name to access the Client ID and Basic Authorization Token.
Launch the API using the information from the previous step.
Use the code samples from the signNow library.
When you're ready to go live, go to your signNow account and choose a subscription plan.
If you can't find a subscription that suits your needs, contact the Sales team.
Change the test URL in your requests to the production environment URL.
Delight your customers and partners with a streamlined eSignature experience.

The signNow API is straightforward to embed, test, and work with (no sales people engaged). Gain the capability to embed eSignature workflows into your app or website with C# Client using the API easily. Select signNow for more streamlined eSignature workflows.

How it works

Create an account and get the required tokens

Use code samples to embed eSignature workflows into your app or website with C# Client using the API

Enjoy the power of eSignature in your workflows

Watch our instructions to build custom integrations with ease

signNow offers a free testing environment to explore the eSignature.

Trusted eSignature solution — what our customers are saying

Explore how the 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.

Read full review

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

5

Susan S

I've been using SignNow for years (since it was CudaSign). I started using 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