Electronic Signature
Developers
Features
API for eSignature Solutions
Send a document for signing and request attachments using cURL

Send a document for signing and request attachments using cURL

Use airSlate SignNow’s API to ensure data collected from your customers is 100% complete. Create and send an attachment request for one or several additional documents required to complete your workflow.

Free to test
Fast to deploy
Powerful & secure

Request additional documents from signers

Use the sample code to make a request for documents to be added to an existing eSignature workflow.

Node.js

C#

Java

Python

cURL

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public class DocumentUpdateRequestModel
    {
        public List<FieldRequestBase> fields { get; private set; } = new List<FieldRequestBase>();
    }
 
    public abstract class FieldRequestBase
    {
        public abstract string type { get; }
        public bool required { get; set; }
        public string template_field_id { get; set; }
        public string role { get; set; }
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        public string name { get; set; }
        public int page_number { get; set; }
        public int x { get; set; }
        public int y { get; set; }
        public int width { get; set; }
        public int height { get; set; }
    }
 
    public abstract class LabelledFieldRequest : FieldRequestBase
    {
        public string label { get; set; }
    }
 
    public abstract class TextFieldRequestBase : LabelledFieldRequest
    {
        public override string type => "text";
 
    }
    public class TextFieldRequest : TextFieldRequestBase
    {
        public string prefilled_text { get; set; }
        public string validator_id { get; set; }
    }
    public class InitialsFieldRequest : LabelledFieldRequest
    {
        public override string type { get { return "initials"; } }
    }
    public class CheckboxFieldRequestModel : LabelledFieldRequest
    {
        public override string type => "checkbox";
        public bool prefilled_text { get; set; }
    }
 
    public class DropdownFieldRequest : LabelledFieldRequest
    {
        public override string type => "enumeration";
        public string[] enumeration_options { get; set; }
        public bool custom_defined_option { get; set; }
    }
 
    public class CalculatedFieldRequest : TextFieldRequestBase
    {
        /// <summary>
        /// Formula that includes field names and operations
        /// </summary>
        public Formula calculation_formula { get; set; }
        /// <summary>
        /// String representation of the formula. Just a text that user will see in the field settings.
        /// </summary>
        public string formula { get; set; }
        public int calculation_precision { get; set; }
    }
 
    public enum FormulaOperator
    {
        add, sub, div, mul
    }
 
    public class Formula
    {
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        [JsonConverter(typeof(StringEnumConverter))]
        public FormulaOperator? @operator { get; private set; }
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        public object term { get; private set; }
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        public Formula left { get; private set; }
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        public Formula right { get; private set; }
        private Formula(object term)
        {
            this.term = term;
        }
        private Formula(FormulaOperator @operator, Formula leftOperand, Formula rightOperand)
        {
            this.@operator = @operator;
            left = leftOperand;
            right = rightOperand;
        }
        private Formula(FormulaOperator @operator, string leftFieldName, string rightFieldName)
            : this(@operator, new Formula(leftFieldName), new Formula(rightFieldName))
        {
        }
        private Formula(FormulaOperator @operator, string leftFieldName, Formula rightOperand)
            : this(@operator, new Formula(leftFieldName), rightOperand)
        {
        }
        private Formula(FormulaOperator @operator, Formula leftOperand, string rightFieldName)
            : this(@operator, leftOperand, new Formula(rightFieldName))
        {
        }
        public static Formula Add(string leftFieldName, string rightFieldName)
        {
            return new Formula(FormulaOperator.add, leftFieldName, rightFieldName);
        }
        public static Formula Add(string leftFieldName, Formula rightOperand)
        {
            return new Formula(FormulaOperator.add, leftFieldName, new Formula(rightOperand));
        }
        public static Formula Add(Formula leftOperand, string rightFieldName)
        {
            return new Formula(FormulaOperator.add, new Formula(leftOperand), rightFieldName);
        }
        public static Formula Add(Formula leftOperand, Formula rightOperand)
        {
            return new Formula(FormulaOperator.add, new Formula(leftOperand), new Formula(rightOperand));
        }
        public static Formula Sub(string leftFieldName, string rightFieldName)
        {
            return new Formula(FormulaOperator.sub, leftFieldName, rightFieldName);
        }
        public static Formula Sub(string leftFieldName, Formula rightOperand)
        {
            return new Formula(FormulaOperator.sub, leftFieldName, new Formula(rightOperand));
        }
        public static Formula Sub(Formula leftOperand, string rightFieldName)
        {
            return new Formula(FormulaOperator.sub, new Formula(leftOperand), rightFieldName);
        }
        public static Formula Sub(Formula leftOperand, Formula rightOperand)
        {
            return new Formula(FormulaOperator.sub, new Formula(leftOperand), new Formula(rightOperand));
        }
        public static Formula Mul(string leftFieldName, string rightFieldName)
        {
            return new Formula(FormulaOperator.mul, leftFieldName, rightFieldName);
        }
        public static Formula Mul(string leftFieldName, Formula rightOperand)
        {
            return new Formula(FormulaOperator.mul, leftFieldName, new Formula(rightOperand));
        }
        public static Formula Mul(Formula leftOperand, string rightFieldName)
        {
            return new Formula(FormulaOperator.mul, new Formula(leftOperand), rightFieldName);
        }
        public static Formula Mul(Formula leftOperand, Formula rightOperand)
        {
            return new Formula(FormulaOperator.mul, new Formula(leftOperand), new Formula(rightOperand));
        }
        public static Formula Div(string leftFieldName, string rightFieldName)
        {
            return new Formula(FormulaOperator.div, leftFieldName, rightFieldName);
        }
        public static Formula Div(string leftFieldName, Formula rightOperand)
        {
            return new Formula(FormulaOperator.div, leftFieldName, new Formula(rightOperand));
        }
        public static Formula Div(Formula leftOperand, string rightFieldName)
        {
            return new Formula(FormulaOperator.div, new Formula(leftOperand), rightFieldName);
        }
        public static Formula Div(Formula leftOperand, Formula rightOperand)
        {
            return new Formula(FormulaOperator.div, new Formula(leftOperand), new Formula(rightOperand));
        }
    }
 
    public class RadiobuttonFieldRequest : FieldRequestBase
    {
        public override string type { get { return "radiobutton"; } }
        public Radio[] radio { get; set; }
    }
 
    public class SignatureFieldRequest : FieldRequestBase
    {
        public override string type { get { return "signature"; } }
    }
 
    public class AttachmentFieldRequest : LabelledFieldRequest
    {
        public override string type => "attachment";
    }
 
    public class Radio
    {
        public string radio_id { get; set; }
        public int page_number { get; set; }
        public int x { get; set; }
        public int y { get; set; }
        public double width { get; set; }
        public double height { get; set; }
        public int @checked { get; set; }
        public string value { get; set; }
        public int created { get; set; }
        public object[] json_attributes { get; set; }
    }
 
    public static class CalculatableValidatorId
    {
        public const string Number = "1109cfbbb06311a06a4c7f8d04f1f0d5c44103cb";
        public const string UsCurrency = "150662c7221a6a6ebcbb7c50ca46359d19757f81";
        public const string PositiveInteger = "1f9486ae822d30ba3df2cb8e65303ebfb8c803e8";
        public const string PositiveOrNegativeInteger = "23a57c29fa089e22bcf85d601c8091bc9c7da570";
        public const string UsInteger = "f031b8b63127c6915949bfc55e3cc81edbb12ecc";
        public const string UsPositiveInteger = "4cf9dfe7e65eb0a2c0c93e199f1ec1cdc23a267d";
        public const string EuInteger = "e8b7248b323525d1e8d5240ccf87d8c2926622cd";
        public const string EuPositiveInteger = "8937f6d0511167d67c6b21fe07c9ccd3a8116126";
    }
 
    public static class TextFieldValidatorId
    {
        public const string Email = "7cd795fd64ce63b670b52b2e83457d59ac796a39";
        public const string USPhone = "13cc1d661da456d27b249b73056ed4d1f2e72d8e";
        public const string State = "3123849de563f9e14acacc2739467e3d30e426b6";
        public const string Number = "1109cfbbb06311a06a4c7f8d04f1f0d5c44103cb";
        public const string UsCurrency = "150662c7221a6a6ebcbb7c50ca46359d19757f81";
        public const string Alphanumeric = "3859296fffd39cb8efeaffda5899973c014ce42e";
        public const string PositiveInteger = "1f9486ae822d30ba3df2cb8e65303ebfb8c803e8";
        public const string PositiveOrNegativeInteger = "23a57c29fa089e22bcf85d601c8091bc9c7da570";
        public const string Age = "1a203fa91791b0458608be045a454ba90557fb26";
        public const string SSN = "2cd795fd64ce63b670b52b2e83457d59ac796a39";
        public const string CreditCardNumber = "2f1c408bdf2f99fc5d4c342249da88ce5d2a5f02";
        public const string BankRTN = "959b068ef8ee5cc27e09ba79af58f9e805b7c2b3";
        public const string UsInteger = "f031b8b63127c6915949bfc55e3cc81edbb12ecc";
        public const string UsPositiveInteger = "4cf9dfe7e65eb0a2c0c93e199f1ec1cdc23a267d";
        public const string EuInteger = "e8b7248b323525d1e8d5240ccf87d8c2926622cd";
        public const string EuPositiveInteger = "8937f6d0511167d67c6b21fe07c9ccd3a8116126";
    }
 
    public static class DateFieldValidatorId
    {
        public const string DateUS = "13435fa6c2a17f83177fcbb5c4a9376ce85befeb";
        public const string DateEU = "059b068ef8ee5cc27e09ba79af58f9e805b7c2b3";
        public const string TimeOnly = "09d3bb6a5eb6598edb7bfad02b0143d8c68ad788";
        public const string WrittenDate = "0f4827a308018f98b11ae3923104685ff0c03070";
        public const string DateTime = "06448a0d0eb6a71c7c116ec4754bcb04ebf11da5";
    }
     
public partial class RestSharpSamples
    {
        public static void AddFillableFields(string accessToken, string apiUrl, string documentId, DocumentUpdateRequestModel documentUpdateRequest)
        {
            var client = new RestClient { BaseUrl = new Uri(apiUrl) };
            var request = new RestRequest($"/document/{documentId}", Method.PUT)
                .AddHeader("Accept", "application/json")
                .AddHeader("Authorization", $"Bearer {accessToken}");
            request.RequestFormat = DataFormat.Json;
            var requestJson = JsonConvert.SerializeObject(documentUpdateRequest);
            request.AddBody(requestJson);
            var response = client.Execute(request);
 
            if (response.StatusCode != HttpStatusCode.OK)
            {
                throw new Exception(response.Content);
            }
        }
    }  
 
 class Program
    {
        static void Main(string[] args)
        {
            var attachmentField = new AttachmentFieldRequest
            {
                height = 10,
                width = 50,
                label = "AttachMe",
                name = "AttachmentName",
                page_number = 0,
                required = true,
                role = "Signer 1",
                x = 20,
                y = 20
            };
            var checkboxField = new CheckboxFieldRequestModel
            {
                height = 10,
                width = 50,
                label = "Checkbox field",
                name = "Checkbox_field",
                page_number = 0,
                required = true,
                role = "Signer 1",
                x = 20,
                y = 40,
                prefilled_text = true
            };
            var datetimeField = new TextFieldRequest
            {
                height = 10,
                width = 80,
                label = "Datetime field",
                name = "Datetime_field",
                page_number = 0,
                prefilled_text = DateTime.Now.ToLongDateString(),
                required = true,
                role = "Signer 1",
                x = 100,
                y = 40,
                validator_id = DateFieldValidatorId.DateTime
            };
            var dropdownField = new DropdownFieldRequest
            {
                height = 10,
                width = 80,
                label = "Dropdown field",
                name = "Dropdown_field",
                page_number = 0,
                required = true,
                role = "Signer 1",
                x = 20,
                y = 60,
                custom_defined_option = true,
                enumeration_options = new[] { "10", "20", "30" }
            };
            var inititalsField = new InitialsFieldRequest
            {
                height = 40,
                width = 50,
                name = "Init",
                page_number = 0,
                required = true,
                role = "Signer 1",
                label = "Init label",
                x = 20,
                y = 80
            };
            var signatureField = new SignatureFieldRequest
            {
                height = 40,
                width = 50,
                name = "Sign",
                page_number = 0,
                required = true,
                role = "Signer 1",
                x = 120,
                y = 80
            };
            var textField = new TextFieldRequest
            {
                height = 10,
                width = 80,
                label = "Text field",
                name = "Text_field",
                page_number = 0,
                prefilled_text = "Prefilled text",
                required = true,
                role = "Signer 1",
                x = 20,
                y = 150
            };
            var calcField_number1 = new TextFieldRequest
            {
                height = 10,
                width = 50,
                label = "Number 1",
                name = "Number_1",
                page_number = 0,
                prefilled_text = "1",
                required = true,
                role = "Signer 1",
                x = 200,
                y = 20,
                validator_id = CalculatableValidatorId.Number
            };
            var calcField_number2 = new TextFieldRequest
            {
                height = 10,
                width = 50,
                label = "Number 2",
                name = "Number_2",
                page_number = 0,
                prefilled_text = "2",
                required = true,
                role = "Signer 1",
                x = 200,
                y = 40,
                validator_id = CalculatableValidatorId.PositiveInteger
            };
            var calcField_number3 = new TextFieldRequest
            {
                height = 10,
                width = 50,
                label = "Number 3",
                name = "Number_3",
                page_number = 0,
                prefilled_text = "3",
                required = true,
                role = "Signer 1",
                x = 200,
                y = 60,
                validator_id = CalculatableValidatorId.PositiveOrNegativeInteger
            };
            var calcField_number4 = new TextFieldRequest
            {
                height = 10,
                width = 50,
                label = "Number 4",
                name = "Number_4",
                page_number = 0,
                prefilled_text = "4",
                required = true,
                role = "Signer 1",
                x = 200,
                y = 80,
                validator_id = CalculatableValidatorId.EuInteger
            };
 
            var calculatedField = new CalculatedFieldRequest
            {
                height = 10,
                width = 50,
                label = "Calculated field",
                name = "Calculated_field",
                page_number = 0,
                required = true,
                role = "Signer 1",
                x = 300,
                y = 20,
                calculation_precision = 2
            };
            calculatedField.formula = $"({{{calcField_number1.name}}}+{{{calcField_number2.name}}})/{{{calcField_number3.name}}}-{{{calcField_number4.name}}}";
            calculatedField.calculation_formula = Formula.Div(Formula.Add(calcField_number1.name, calcField_number2.name), Formula.Sub(calcField_number3.name, calcField_number4.name));
 
            var documentUpdateRequest = new DocumentUpdateRequestModel();
            documentUpdateRequest.fields.Add(attachmentField);
            documentUpdateRequest.fields.Add(checkboxField);
            documentUpdateRequest.fields.Add(datetimeField);
            documentUpdateRequest.fields.Add(dropdownField);
            documentUpdateRequest.fields.Add(inititalsField);
            documentUpdateRequest.fields.Add(signatureField);
            documentUpdateRequest.fields.Add(textField);
            documentUpdateRequest.fields.Add(calcField_number1);
            documentUpdateRequest.fields.Add(calcField_number2);
            documentUpdateRequest.fields.Add(calcField_number3);
            documentUpdateRequest.fields.Add(calcField_number4);
            documentUpdateRequest.fields.Add(calculatedField);
 
            RestSharpSamples.AddFillableFields(Token.access_token, ApiBaseUrl, id, documentUpdateRequest);
        }
 
    }

import signnow_python_sdk
from datetime import datetime

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, '*')

# Create the PUT /document payload
    doc_payload = {
        "texts": [
            {
                "size": 22,
                "x": 61,
                "y": 72,
                "page_number": 0,
                "font": "Arial",
                "data": "a sample text element",
                "line_height": 9.075,
                "client_timestamp": datetime.now().strftime("%s")
            }
        ],
        "fields": [
            {
                "x": 61,
                "y": 100,
                "width": 120,
                "height": 34,
                "page_number": 0,
                "role": "Signer 1",
                "required": True,
                "type": "signature"
            },
            {
                "x": 61,
                "y": 160,
                "width": 120,
                "height": 12,
                "page_number": 0,
                "label": "New Label",
                "role": "Signer 1",
                "required": True,
                "type": "text"
            },
            {
                "x": 61,
                "y": 178,
                "width": 41,
                "height": 26,
                "page_number": 0,
                "role": "Signer 2",
                "required": True,
                "type": "initials"
            }
        ]
    }

# Update document template with payload
    put_doc_response = signnow_python_sdk.Template.update(access_token['access_token'], template_id, doc_payload)

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Watch the airSlate SignNow API in action

Evaluate airSlate SignNow's send a document for signing and request attachments using curl

The airSlate SignNow API provides enterprises with a distinctive set of features that facilitate more effective business processes. Explore the benefits of our send a document for signing and request attachments using curl by signing up for a complimentary Sandbox account.

Complete these steps to establish a Sandbox account:

Access the airSlate SignNow Developers webpage. There you can find additional details regarding the API and set up your Sandbox account.
Register for a trial. Enter your email address and click the Create API sandbox button to sign up.
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Navigate to Developer Sandbox. Create a password to allow continued access to your developer account.
Include an application. Click Add App, assign a name to your app, and click Add to finalize changes. The API token for the app will be generated automatically.
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How it works

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Use code samples to send a document for signing and request attachments using cURL

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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.

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

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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.

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I couldn't conduct my business without contracts and...

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Dani P

I couldn't conduct my business without contracts and this makes the hassle of downloading, printing, scanning, and reuploading docs virtually seamless. I don't have to worry about whether or not my clients have printers or scanners and I don't have to pay the ridiculous drop box fees. Sign now is amazing!!

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Jennifer

My overall experience with this software has been a tremendous help with important documents and even simple task so that I don't have leave the house and waste time and gas to have to go sign the documents in person. I think it is a great software and very convenient.

airSlate SignNow has been a awesome software for electric signatures. This has been a useful tool and has been great and definitely helps time management for important documents. I've used this software for important documents for my college courses for billing documents and even to sign for credit cards or other simple task such as documents for my daughters schooling.

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