Introduction

One-liner: send yourself a contract

To send yourself a test contract replace the EMAIL_ADDRESS:

curl -X POST -H 'Content-type:application/json' https://c21bc7:@esignatures.io/api/contracts -d '{"template_id": "20ac76c9","signers":[{"name":"Sam Signer","email":"EMAIL_ADDRESS"}]}'

Requests, responses

The API calls are organized around REST. Our API is predictable, uses HTTP response codes (2xx, 4xx, 5xx) to indicate API results/errors. We use built-in HTTP features, like HTTP authentication and HTTP verbs, which are understood by off-the-shelf HTTP clients. JSON is returned by all API responses, including errors.

Basic Authentication

POST https://<secret-token>:@esignatures.io/api/<action> HTTP/1.1

curl -X POST -H 'Content-type:application/json' https://<secret-token>:@esignatures.io/api/<action>

Authenticate your account when using the API by including your secret API token in the request.

Authentication to the API is performed via HTTP Basic Auth. Provide your API key as the basic auth username value. You do not need to provide a password. API requests without authentication will fail.

All API requests must be made over HTTPS. Calls made over plain HTTP will fail.

Basic auth	Description
username	Your API secret token, displayed on your API dashboard page, when logged in

Rate limiting

To protect against accidental requests and intentional attacks, our service uses an adaptive rate limiting technique. Adaptive rate limiting means that the rate limiting changes based on the usage patterns.

Please note that it's discouraged to repetitively 'poll' contract information via the API, eg GET /api/contracts/<id>. Using Webhook notifications is the recommended way to keep your contract statuses updated.

Contracts

Contracts can be fully managed via the API. Sending a contract can be done with a single API call, and after that signatures are collected, and notifications are provided at every stage of the contract’s lifecycle via webhooks.

Sending a contract

POST /api/contracts HTTP/1.1

JSON request parameters

{
  "template_id": "4templ44-6666-3333-4444-555555555555",
  "title": "Loan Agreement - Saver package",
  "metadata": "ID0001",
  "locale": "en",
  "test": "no",
  "signers": [
    {
      "name": "Benny Bell",
      "email": "benny@me.com",
      "mobile": "+12481234567",
      "company_name": "ACME Corp",
      "redirect_url": "https://your-website.com/aftersign",
      "signing_order": "1",
      "auto_sign": "no",
      "embedded_sign_page": "no",
      "embedded_redirect_iframe_only": "no",
      "skip_signature_request": "no",
      "skip_signer_identification": "no",
      "skip_final_contract_delivery":"no"
    }
  ],
  "placeholder_fields": [
      {
        "api_key": "interest_rate",
        "value": "3.2%"
      },
      {
        "api_key": "floor-plan",
        "document_elements": [{"type":  "image", "image_base64":  "PD94bW...yc2lvbj0iM="}]
      }
  ],
  "signer_fields": [
      {
        "api_key": "preferred_term",
        "default_value": "15 years"
      }
  ],
  "emails": {
    "signature_request_subject": "Your document is ready to sign",
    "signature_request_text": "Hi __FULL_NAME__, \n\n To review and sign the contract please press the button below \n\n Kind Regards",
    "final_contract_subject": "Your document is signed",
    "final_contract_text": "Hi __FULL_NAME__, \n\n Your document is signed.\n\nKind Regards",
    "cc_email_addresses": ["tom@email.com", "francis@email.com"],
    "reply_to": "support@customdomain.com"
  },
  "custom_branding": {
    "company_name": "WhiteLabel LLC",
    "logo_url": "https://online-logo-store.com/yourclient-logo.png"
  }
}

JSON response

{
  "status": "queued",
  "data": {
    "contract": {
      "id": "1contr11-2222-3333-4444-555555555555",
      "status": "sent",
      "title": "Loan Agreement - Saver package",
      "metadata": "ID0001",
      "source": "api",
      "test": "no",
      "signers": [
        {
          "id": "6signer6-9999-2222-4444-111111111111",
          "name": "Benny Bell",
          "email": "benny@me.com",
          "mobile": "+12481234567",
          "company_name": "ACME Corp",
          "sign_page_url": "https://esignatures.io/sign/6signer6-9999-2222-4444-111111111111"
        }
      ]
    }
  }
}

Example request

curl -X POST -H 'Content-type:application/json' https://<secret-token>:@esignatures.io/api/contracts -d '{"template_id": "4templ44-6666-3333-4444-555555555555","signers":[{"name":"Sam Signer","email":"sam@tenants.com","mobile":"+12481234567"}],"placeholder_fields":[{"api_key":"preferred_term","value":"24 months"}], "test": "yes"}'

This request creates the contract and sends the links (via email or SMS) to the signers to collect their signatures.

Parameter	Required	Description
template_id	yes	Specifies the template to be used for the contract (the template_id is shown when editing the template)
title	no	The unique title of the contract (Template name when not specified). It appears in emails, generated documents, and on dashboard pages
metadata	no	Custom information
locale	no	Setting the signer page/emails language. Currently available locales: da vi ro en rs fr cz sk no ja en-GB sv sl de hr id pt pl nl it hu es
test	no	The sent contract is marked as 'demonstration only', and no fee is deducted for sending the contract.
signers		List of signers
signers:name	yes	Name of the signer
signers:email	cond	Email address of the signer - for identification. Either email or mobile is required
signers:mobile	cond	Mobile number of the signer - for identification. Either email or mobile is required. (Non-US mobile numbers must start with the country code, eg +61)
signers:company_name	no	Company name for the signer
signers:redirect_url	no	The signer will be redirected to that URL after signing the contract.
signers:signing_order	no	A number that defines the order of signers. When the same number is used for two or more signers they will receive the signature request at the same time. By default the signers will receive the signature requests in order (not at the same time).
signers:auto_sign	no	When yes, the signer's signature will automatically be added to the contract
signers:embedded_sign_page	no	The signing page can be embedded within an iframe when set to yes, and no signature requests will be delivered.
signers:embedded_redirect_iframe_only	no	When the signing page is embedded within an iframe, setting this flag to yes prevents redirecting the entire page.
signers:skip_signature_request	no	When yes, the signer will not receive the signature request email/SMS
signers:skip_signer_identification	no	When yes, the signer won't receive the email/SMS verification code. Note: it is a legal requirement in most of the countries to identify the signers. If the skip_signer_identification is yes you will need to identify the signer via email, SMS or other means to form legally binding contracts.
signers:skip_final_contract_delivery	no	When yes, the signer won't receive the last notification of the signed document. Note: it is a legal requirement in most of the countries to deliver the signed document to the signing parties. If the skip_final_contract_delivery is yes you will need to deliver the documents to the signers.
placeholder_fields	no	Placeholder fields are the highlighted texts in the template between curly brackets, eg {{interest_rate}}. Replace the Placeholder fields with simple custom text using the placeholder_fields:value parameter, or with headers, paragraphs using the placeholder_fields:document_elements parameter.
placeholder_fields:api_key		The "api_key" is the text between the curly brackets in the contract templates. Eg: {{interest_rate}}
placeholder_fields:document_elements		Replace the Placeholder field with headers, formatted text, images or tables. Find the detailed document_elements documentation under the Notes section.
placeholder_fields:value		Replace the Placeholder field with simple text.
signer_fields	no	Use signer_fields to pre-fill Signer input fields.
signer_fields:api_key		Specify the "api_key" in the template editor for the given Signer input field
signer_fields:default_value		The initial (default) value for the input field (Use '1' to tick checkboxes)
signer_fields:select_position		For Select fields only - The index of the pre-selected option (starting from 0)
emails:signature_request_subject	no	The subject in the email that will be sent to the signers when collecting their signatures
emails:signature_request_text	no	The text in the email that will be sent to the signers. __FULL_NAME__ constant is replaced with the name of the signer.
emails:final_contract_subject	no	The subject in the email that will be sent to the signers with the final PDF contract
emails:final_contract_text	no	The text in the email that will be sent to the signers with the final PDF contract. __FULL_NAME__ constant is replaced with the name of the signer.
emails:cc_email_addresses	no	List of email addresses to CC the signed PDF contract
emails:reply_to	no	Custom reply_to email address (your API support email when not specified)
custom_branding:company_name	no	Custom sender company name
custom_branding:logo_url	no	Custom logo (PNG x400 recommended)

Response field	Description
status	queued
contract:id	Id of the contract
contract:title	The unique title of the contract
contract:metadata	The metadata provided in the original request
contract:source	The source of the contract being api, ui or zapier
contract:test	yes means test contract, no means live contract
contract:signers:id	Id of the signer
contract:signers:name	Name of the signer
contract:signers:email	Email of the signer
contract:signers:mobile	Mobile of the signer
contract:signers:company_name	Company name for the signer
contract:signers:sign_page_url	Unique sign page URL for the given signer. It can be embedded in an iframe or used standalone. Note: As part of the json response, this string will be encoded and simple copy paste of the URL won't work.

Querying contract details

GET /api/contracts/<contract_id> HTTP/1.1

JSON response

{
  "data": {
    "id": "1contr11-2222-3333-4444-555555555555",
    "status": "sent",
    "title": "Tenancy Agreement",
    "metadata": "ID0001",
    "source": "api",
    "test": "no",
    "contract_pdf_url": "https://aws.com/contracts/1contr11-2222-3333-4444-555555555555?secret_token=x123y",
    "signers": [
      {
        "id": "6signer6-9999-2222-4444-111111111111",
        "name": "Sam Signer",
        "email": "sam@tenants.com",
        "mobile": "+12481234567",
        "company_name": "ACME Corp",
        "sign_page_url": "https://esignatures.io/sign/6signer6-9999-2222-4444-111111111111",
        "events": [
          {
            "event": "sign_contract",
            "timestamp": "2015-10-22T18:19:35.979"
          }
        ],
        "signer_fields": [
          {
            "api_key": "city",
            "value": "Boston"
          }
        ]
      }
    ]
  }
}

Example request

curl -X GET https://<secret-token>:@esignatures.io/api/contracts/1contr11-2222-3333-4444-555555555555

Returns the details of a contract, the details of the signers, including the contract events, the signer events, and the values the signers entered.

Response field	Description
id	Id of the contract
status	'sent' / 'signed' / 'withdrawn'
title	The unique title of the contract
metadata	The metadata provided in the original request
source	The source of the contract being api, ui or zapier
test	yes means test contract, no means live contract
contract_pdf_url	When the contract is signed, the finalized PDF can be accessed via this url. Expires in 7 days following the request. (As part of the json response, this string will be encoded and simple copy paste of the URL won't work.)
signers	List of signers
signers:id	Id of the signer
signers:name	Name of the signer
signers:email	Email of the signer
signers:mobile	Mobile of the signer
signers:company_name	Company name for the signer
signers:sign_page_url	Unique sign page URL for the given signer. It can be embedded in an iframe or used standalone. Note: As part of the json response, this string will be encoded and simple copy paste of the URL won't work.
signers:events	Events of the signer
signers:events:event	'contract_sent' / 'reminder_emailed' / 'reminder_sms_sent' / 'contract_viewed' / 'delivering_contract_email_failure' / 'email_spam_complaint' / 'delivering_contract_sms_failure' / 'sign_contract' / 'final_contract_sent'/ 'signature_declined' / 'disable_reminders'
signers:events:timestamp	Time of the event
signers:signer_fields	Information provided by the signer for Text fields, Dropdowns and Checkboxes.
signers:signer_fields:api_key	The "api_key" specified by you in the template editor for a given Signer field
signers:signer_fields:value	The value the signer entered/selected for that field (Checkbox is '1' when ticked)

Withdrawing a contract

Withdrawn contracts can't be signed any more, and signed contracts can't be withdrawn.

Withdrawing the contract doesn't result in deletion of the contract related information, the contract details can still be queried.

POST /api/contracts/<contract_id>/withdraw HTTP/1.1

JSON response

{
  "status": "queued"
}

Example request

curl -X POST https://<secret-token>:@esignatures.io/api/contracts/1contr11-2222-3333-4444-555555555555/withdraw

Response field	Description
status	'queued'

Signers

Updating signer details

POST /api/contracts/<contract_id>/signers/<signer_id> HTTP/1.1

JSON request parameters

{
  "name": "Sam Signer",
  "email": "sam@tenants.com",
  "mobile": "+1 541 754 3010"
}

JSON response

{
  "status": "queued"
}

Example request

curl -X POST -H 'Content-type:application/json' https://<secret-token>:@esignatures.io/api/contracts/1contr11-2222-3333-4444-555555555555/signers/6signer6-9999-2222-4444-111111111111 -d '{"email":"sam@tenants.com", "name":"Sam Signer-Smith"}'

The contact details of a signer can be updated via this API request. Note: The contract is not emailed automatically when updating signer.

Parameter	Required	Description
name	no	Name of the signer
email	no	Email to identify the signer
mobile	no	Mobile number to identify the signer

Response field	Description
status	'queued'

(Re-)Sending sign request

POST /api/contracts/<contract_id>/signers/<signer_id>/send_contract HTTP/1.1

JSON response

{
  "status": "queued"
}

Example request

curl -X POST https://<secret-token>:@esignatures.io/api/contracts/1contr11-2222-3333-4444-555555555555/signers/6signer6-9999-2222-4444-111111111111/send_contract

Response field	Description
status	'queued'

Templates

Templates can be created and maintained using the built-in editor. You can import/export template via the UI.

List of templates

GET /api/templates HTTP/1.1

JSON response

{
  "data": [
    {
      "template_id": "4templ44-6666-3333-4444-555555555555",
      "template_name": "Residential Tenancy Agreement"
    }
  ]
}

Example request

curl -X GET https://<secret-token>:@esignatures.io/api/templates

Returns the list of templates you can send.

Response field	Description
template_id	Id of the template
template_name	Name of the template

Query template details

GET /api/templates/<template_id> HTTP/1.1

JSON response

{
  "data": {
    "template_id": "4templ44-6666-3333-4444-555555555555",
    "template_name": "Residential Tenancy Agreement",
    "created_at": "2015-10-24T15:15:35.979",
    "placeholder_fields": ["interest_rate"]
  }
}

Example request

curl -X GET https://<secret-token>:@esignatures.io/api/templates/4templ44-6666-3333-4444-555555555555

Returns the details of the template. The Placeholder keys are specified with the template editor between {{ }} double curly brackets.

Response field	Description
template_id	Id of the template
template_name	Name of the template
created_at	Date of creation
placeholder_fields	List of Placeholder fields in the template

Embedded signing

Iframe code

<iframe src="SIGN_PAGE_URL">
</iframe>

Iframe code with auto-resize

<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script src="https://cdncf.esignatures.io/assets/iframeResizer.4.2.10.min.js"></script>
<iframe
    src="SIGN_PAGE_URL"
    id="eSignaturesIOIframe"
    onload="iFrameResize({heightCalculationMethod: 'bodyScroll'}, '#eSignaturesIOIframe')"
    style="width: 1px;min-width: 100%;">
</iframe>

Example POST#contracts request to create the contract

curl -X POST -H 'Content-type:application/json' https://<secret-token>:@esignatures.io/api/contracts -d '{"template_id": "4templ44-6666-3333-4444-555555555555","signers":[{"name":"Sam Signer","email":"sam@tenants.com","embedded_sign_page":"yes"}]}'

The sign page can be embedded into an iframe. Steps:

1. Create a contract with POST#contracts, and specify embedded_sign_page=yes for the signer.
2. The response json will include a data:contract:signers:sign_page_url for that signer.
3. In the 'iframe code' (see example), replace the SIGN_PAGE_URL with the sign_page_url.

Optional:

• Specify the redirect_url when creating a contract, and the signers will be redirected to that URL after signing the docuemnt.
• Set the skip_signer_identification to yes to skip the identification process. Note: it is a legal requirement to identify the signers. If the skip_signer_identification is yes you will need to identify the signer via email, SMS or other means to form legally binding contracts.
• Set the embedded_redirect_iframe_only to yes to prevent the entire page being redirected. Only the iframe will load the redirect page when set to yes.

Webhooks

Use webhooks to be notified about events that happen real-time. For example, when a contract gets signed, a request is triggered to the Webhook URL specified by you on the API dashboard page. Creating a webhoook endpoint on your server means simply accepting POST requests at a given URL. Webhook data is sent as JSON in the POST request body.

If a webhook is not successfully received (not 2xx response code), eSignatures.io will continue trying to send the webhook once an hour for up to six times. The requests timeout is 5 seconds.

All Webhook requests we trigger use BASIC auth. You can enforce or ignore that. The username is your API secret token, without password.

Contract sent to signer

JSON body

{
  "status": "contract-sent-to-signer",
  "data": {
    "id": "6signer6-9999-2222-4444-111111111111",
    "name": "Sam Signer",
    "email": "sam@tenants.com",
    "mobile": "+12481234567",
    "company_name": "ACME Corp",
    "signing_order": "1",
    "auto_sign": "no",
    "embedded_sign_page": "no",
    "redirect_url": "",
    "contract": {
      "id": "1contr11-2222-3333-4444-555555555555",
      "title": "Sample NDA",
      "metadata": "ID0001",
      "source": "api",
      "test": "no",
      "placeholder_fields": [
        {
          "api_key": "interest_rate",
          "value": "3.2%"
        }
      ]
    }
  }
}

This webhook notification is triggered, when the contract is sent to the signer for signature.

Signer viewed the contract

JSON body

{
  "status": "signer-viewed-the-contract",
  "data": {
    "id": "6signer6-9999-2222-4444-111111111111",
    "name": "Sam Signer",
    "email": "sam@tenants.com",
    "mobile": "+12481234567",
    "company_name": "ACME Corp",
    "signing_order": "1",
    "auto_sign": "no",
    "embedded_sign_page": "no",
    "redirect_url": "",
    "contract": {
      "id": "mobile1contr11-2222-3333-4444-555555555555",
      "title": "Sample NDA",
      "metadata": "ID0001",
      "source": "api",
      "test": "no"
    },
    "events": [
      {
        "event": "contract_viewed",
        "timestamp": "2015-10-22T18:19:35.979"
      }
    ]
  }
}

This webhook notification is triggered, when the signer views the contract the first time.

Signer signed the contract

JSON body

{
  "status": "signer-signed",
  "data": {
    "id": "6signer6-9999-2222-4444-111111111111",
    "name": "Sam Signer",
    "email": "sam@tenants.com",
    "mobile": "+12481234567",
    "company_name": "ACME Corp",
    "signing_order": "1",
    "auto_sign": "no",
    "embedded_sign_page": "no",
    "redirect_url": "",
    "contract": {
      "id": "1contr11-2222-3333-4444-555555555555",
      "title": "Sample NDA",
      "metadata": "ID0001",
      "source": "api",
      "test": "no",
      "placeholder_fields": [
        {
          "api_key": "interest_rate",
          "value": "3.2%"
        }
      ]
    },
    "signer_fields": [
      {
        "api_key": "city",
        "value": "Boston"
      }
    ]
  }
}

This webhook notification is triggered when a signer signs the contract. It includes the details of the signer, and the texts for the Signer fields, if the signer entered any.

Contract signed

JSON body

{
  "status": "contract-signed",
  "data": {
    "id": "1contr11-2222-3333-4444-555555555555",
    "title": "Sample NDA",
    "metadata": "ID0001",
    "source": "api",
    "test": "no",
    "contract_pdf_url": "https://aws.com/contracts/1contr11-2222-3333-4444-555555555555?secret_token=x123y",
    "placeholder_fields": [
      {
        "api_key": "interest_rate",
        "value": "3.2%"
      }
    ],
    "signers": [
      {
        "id": "6signer6-9999-2222-4444-111111111111",
        "name": "Sam Signer",
        "email": "sam@tenants.com",
        "mobile": "+12481234567",
        "company_name": "ACME Corp",
        "sign_page_url": "https://esignatures.io/sign/6signer6-9999-2222-4444-111111111111",
        "events": [
          {
            "event": "sign_contract",
            "timestamp": "2015-10-22T18:19:35.979"
          }
        ],
        "signer_fields": [
          {
            "api_key": "city",
            "value": "Boston"
          }
        ]
      }
    ]
  }
}

This webhook notification is triggered once every signer has signed the contract. It returns the generatede PDF file.

Field	Description
status	'contract-signed'
id	Id of the contract
title	The unique title of the contract
metadata	The metadata provided in the original request
source	The source of the contract being api, ui or zapier
test	yes means test contract, no means live contract
contract_pdf_url	The finalized PDF can be accessed via this url. Expires in 7 days following the request. (As part of the json response, this string will be encoded and simple copy paste of the URL won't work.)
placeholder_fields	The provided list of placeholder_fields which replaced the {{ }} Placeholders in the document
signers	List of signers
signers:id	Id of the signer
signers:name	Name of the signer
signers:email	Email of the signer
signers:mobile	Mobile of the signer
signers:company_name	Company name for the signer
signers:sign_page_url	Unique sign page URL for the given signer. It can be embedded in an iframe or used standalone. Note: As part of the json response, this string will be encoded and simple copy paste of the URL won't work.
signers:events	Events of the signer
signers:events:event	'contract_sent' / 'reminder_emailed' / 'reminder_sms_sent' / 'contract_viewed' / 'delivering_contract_email_failure' / 'email_spam_complaint' / 'delivering_contract_sms_failure' / 'sign_contract' / 'final_contract_sent'/ 'signature_declined' / 'disable_reminders'
signers:events:timestamp	Time of the event
signers:signer_fields	Information provided by the signer (Text field, List)
signers:signer_fields:api_key	The "api_key" specified by you in the template editor for a given Signer field
signers:signer_fields:value	The value the signer entered for this field

Contract withdrawn

JSON body

{
  "status": "contract-withdrawn",
  "data": {
    "id": "1contr11-2222-3333-4444-555555555555",
    "title": "Sample NDA",
    "metadata": "ID0001",
    "source": "api",
    "test": "no",
    "placeholder_fields": [
      {
        "api_key": "interest_rate",
        "value": "3.2%"
      }
    ],
    "signers": [
      {
        "id": "6signer6-9999-2222-4444-111111111111",
        "name": "Sam Signer",
        "email": "sam@tenants.com",
        "mobile": "+12481234567",
        "company_name": "ACME Corp"
      }
    ]
  }
}

This webhook notification is triggered, when the contract is withdrawn.

Signer declined the signature

JSON body

{
  "status": "signer-declined",
  "data": {
    "id": "6signer6-9999-2222-4444-111111111111",
    "name": "Sam Signer",
    "email": "sam@tenants.com",
    "mobile": "+12481234567",
    "company_name": "ACME Corp",
    "signing_order": "1",
    "auto_sign": "no",
    "embedded_sign_page": "no",
    "redirect_url": "",
    "contract": {
      "id": "1contr11-2222-3333-4444-555555555555",
      "title": "Sample NDA",
      "metadata": "ID0001",
      "source": "api",
      "test": "no",
      "placeholder_fields": [
        {
          "api_key": "interest_rate",
          "value": "3.2%"
        }
      ]
    },
    "events": [
      {
        "event": "signature_declined",
        "reason_for_decline": "Commencement date is 5th of June",
        "timestamp": "2015-10-22T18:19:35.979"
      }
    ]
  }
}

This webhook notification is triggered, when the signer declined signing the contract.

Signer requested a Mobile Number update

JSON body

{
  "status": "signer-mobile-update-request",
  "data": {
    "id": "6signer6-9999-2222-4444-111111111111",
    "name": "Sam Signer",
    "email": "sam@tenants.com",
    "mobile": "+12481234567",
    "mobile_new": "+16789123456",
    "company_name": "ACME Corp",
    "signing_order": "1",
    "embedded_sign_page": "no",
    "auto_sign": "no",
    "redirect_url": "",
    "contract": {
      "id": "1contr11-2222-3333-4444-555555555555",
      "title": "Sample NDA",
      "metadata": "ID0001",
      "placeholder_fields": [
        {
          "api_key": "interest_rate",
          "value": "3.2%"
        }
      ]
    }
  }
}

This webhook notification is triggered, when the signer requested a Mobile Number update.

Field	Description
id	Id of the signer
mobile	Mobile of the signer
mobile_new	The requested Mobile number
contract:id	Id of the contract

Webhook error notifications

JSON body

{
  "status": "error",
  "data": {
    "error_code": "email-delivery-failed",
    "contract_id": "1contr11-2222-3333-4444-555555555555",
    "metadata": "ID0001"
  }
}

error_code	Description
email-delivery-failed	Sending the contract to the signer has failed
sms-delivery-failed	Sending the sms to the signer has failed
custom-branding-logo-error	An error occurred while downloading the custom_branding:logo_url

Notes

Document elements

JSON body

[
  {
    "type": "text_header_two",
    "text": "Special conditions"
  },
  {
    "type": "text_normal",
    "text": "I agree to the above terms and conditions.",
    "text_alignment": "right",
    "text_styles": [
      {
        "offset": 2,
        "length": 6,
        "style": "bold"
      }
    ]
  },
  {
    "type": "image",
    "image_base64": "PD94bW...yc2lvbj0iM=",
    "image_alignment": "center",
    "image_height_rem": 8
  },
  {
    "type": "table",
    "table_column_styles": [{"align": "center"}, {"align": "right"}],
    "table_cells": [
      [{"text": "Header1", "styles": ["bold"]}, {"text": "Header2", "styles": ["bold"]}],
      [{"text": "cell1"}, {"text": "cell2"}]
    ]
  }
]

document_elements help you to construct entire sections in a contract.

Field	Required	Description
type	yes	Type of the contract line, one of the following options: text_header_one, text_header_two, text_header_three, text_normal, image, table.
text	cond	The text for the given line.
text_alignment	no	The alignment of the given line. Options: center, right, justified. By default: left
text_styles	no	Ranges of styles
text_styles:style:offset		The beginning of the range (starting with 0)
text_styles:style:length		The length of the range
text_styles:style:style		The style to apply. Options: bold, italic, underline
image_base64	cond	Base64 encoded png or jpg image, max 0.5MB
image_alignment	no	The horizontal position of the image. Options: center, right. By default: left
image_height_rem	no	Image height (2-38)
table_cells	cond	A nested list of rows/cells.
table_column_styles	no	A list of column styles.
table_column_styles:align	no	Column alignment. Options: left, center, right
table_cells:text		The text in the given cell.
table_cells:styles	no	The list of styles for the given cell. Options: bold, italic

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