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Acrobat Sign Webhook overview

Last updated on 18 September 2024

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Admin Console Overview
User Management
1. Add a User
2. Add Users in Bulk
3. Add Users from your Directory
4. Add Users from MS Azure Active Directory
5. Create function-focused users
  1. Technical accounts - API driven
  2. Service accounts - Manually driven
6. Check for users with provisioning errors
7. Change Name/Email Address
8. Edit a user's group membership
9. Edit a user's group membership through the group interface
10. Promote a user to an admin role
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12. Switch User Identity
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14. Authenticate Users with Google Federation
15. Product Profiles
16. Login Experience
Account/Group Settings
1. Settings Overview
2. Global Settings
  1. Account tier and ID
  2. Self Signing Workflows
  3. Send in Bulk
  4. Web Forms
  5. Custom Send Workflows
  6. Power Automate Workflows
  7. Library Documents
  8. Collect form data with agreements
  9. Limited Document Visibility
  10. Attach a PDF copy of the signed agreement
  11. Include a link in the email
  12. Include an image in the email
  13. Files attached to email will be named as
  14. Attach audit reports to documents
  15. Merge multiple documents into one
  16. Download individual documents
  17. Upload a signed document
  18. Delegation for users in my account
  19. Allow external recipients to delegate
  20. Authority to sign
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  22. Power to add Electronic Seals
  23. Set a default time zone
  24. Set a default date format
  25. Users in Multiple Groups (UMG)
    1. Upgrade to use UMG
  26. Group Administrator Permissions
  27. Replace recipient
  28. Audit Report
    1. Overview
    2. Allow unauthenticated access on the transaction verification page
    3. Include reminders
    4. Include view events
    5. Include agreement page/attachment count
  29. In Product Messaging and Guidance
  30. Accessible PDFs
  31. New authoring experience
  32. Healthcare customer
3. Account Setup
  1. Add logo
  2. Customize company Hostname/URL
  3. Add company name
  4. Post agreement URL redirect
4. Signature Preferences
  1. Well formatted signatures
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  5. Custom Terms of Use and Consumer Disclosure
  6. Navigate recipients through form fields
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  8. Allow Stamps workflows
  9. Require signers to provide their Title or Company
  10. Allow signers to print and place a written signature
  11. Show messages when e-signing
  12. Require signers to use a mobile device to create their signature
  13. Request IP address from signers
  14. Exclude company name and title from participation stamps
5. Digital Signatures
  1. Overview
  2. Download and sign with Acrobat
  3. Sign with Cloud Signatures
  4. Include metadata for Identity Providers
  5. Restricted Cloud Signatures Providers
6. Electronic Seals
7. Digital Identity
  1. Digital Identity Gateway
  2. Identity Check policy
8. Report Settings
  1. New report experience
  2. Classic report settings
9. Security Settings
  1. Single Sign-on settings
  2. Remember-me settings
  3. Login password policy
  4. Login password strength
  5. Web session duration
  6. PDF encryption type
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  9. Allowed IP Ranges
  10. Account Sharing
  11. Account sharing permissions
  12. Agreement sharing controls
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  14. Agreement signing password
  15. Document password strength
  16. Block signers by Geolocation
  17. Phone Authentication
  18. Knowledge-Based Authentication (KBA)
  19. Allow page extraction
  20. Document link expiration
  21. Upload a client certificate for webhooks/callbacks
  22. Timestamp
10. Send settings
  1. Show Send page after login
  2. Require recipient name when sending
  3. Lock name values for known users
  4. Allowed recipient roles
  5. Recipient groups
  6. Required fields
  7. Attaching documents
  8. Field flattening
  9. Modify Agreements
  10. Agreement name
  11. Languages
  12. Private messages
  13. Allowed signature types
  14. Reminders
  15. Signed document password protection
  16. Send Agreement Notification through
  17. Signer identification options
    1. Overview
    2. Signing password
    3. One-Time Password via Email
    4. Acrobat Sign authentication
    5. Phone authentication
    6. Cloud-based digital signature
    7. Knowledge-based authentication
    8. Government ID
    9. Signer Identity reports
  18. Content Protection
  19. Enable Notarize transactions
  20. Document Expiration
  21. Preview, position signatures, and add fields
  22. Signing order
  23. Liquid mode
  24. Custom workflow controls
  25. Upload options for the e-sign page
  26. Post-sign confirmation URL redirect
11. Message Templates
12. Bio-Pharma Settings
  1. Overview
  2. Enforce identity authentication
  3. Signing reasons
13. Workflow Integration
14. Notarization Settings
15. Payments Integration
16. Signer Messaging
17. SAML Settings
  1. SAML Configuration
  2. Install Microsoft Active Directory Federation Service
  3. Install Okta
  4. Install OneLogin
  5. Install Oracle Identity Federation
18. Data Governance
19. Time Stamp Settings
20. External Archive
21. Account Languages
22. Email Settings
  1. Email header/footer images
  2. Permit individual user email footers
  3. Customize the Signature Requested email
  4. Customize the To and CC fields
  5. Enable Linkless Notifications
  6. Customize email templates
23. Migrating from echosign.com to adobesign.com
24. Configure Options for Recipients
Guidance for regulatory requirements
1. Accessibility
2. HIPAA
3. GDPR
4. 21 CFR part 11 and EudraLex Annex 11
5. Healthcare customers
6. IVES support
7. "Vaulting" agreements
8. EU/UK considerations
Download Agreements in Bulk
Claim your domain
Report Abuse links

Send, Sign, and Manage Agreements

Recipient Options
1. Cancel an email reminder
2. Options on the e-signing page
Send Agreements
Authoring fields into documents
1. In-app authoring environment
2. Create forms with text tags
3. Create forms using Acrobat (AcroForms)
  1. AcroForm creation
  2. Creating accessible PDFs
4. Fields
  1. Field types
  2. Field content appearance
  3. Field validations
  4. Masked fields values
  5. Setting show/hide conditions
  6. Calculated fields
5. Authoring FAQ
Sign Agreements
Manage Agreements
Audit Report
Reporting and Data exports
1. Overview
2. Grant users access to reporting
3. Report charts
4. Data Exports
5. Rename a report/export
6. Duplicate a report/export
7. Schedule a report/export
8. Delete a report/export
9. Check Transaction Usage

Advanced Agreement Capabilities and Workflows

Webforms
Reusable Templates (Library templates)
Transfer ownership of web forms and library templates
Power Automate Workflows
1. Overview of the Power Automate integration and included entitlements
2. Enable the Power Automate integration
3. In-Context Actions on the Manage page
4. Track Power Automate usage
5. Create a new flow (Examples)
6. Triggers used for flows
7. Importing flows from outside Acrobat Sign
8. Manage flows
9. Edit flows
10. Share flows
11. Disable or Enable flows
12. Delete flows
13. Useful Templates
  1. Administrator only
  2. Agreement archival
    1. Save your completed documents to SharePoint
    2. Save your completed documents to One Drive for Business
    3. Save your completed documents to Google Drive
    4. Save your completed documents to DropBox
    5. Save your completed documents to Box
  3. Webform agreement archival
    1. Save completed web form documents to SharePoint Library
    2. Save completed web form documents to OneDrive for Business
    3. Save completed documents to Google Drive
    4. Save completed web form documents to Box
  4. Agreement data extraction
    1. Extract form field data from your signed document and update Excel sheet
  5. Agreement notifications
    1. Send custom email notifications with your agreement contents and signed agreement
    2. Get your Adobe Acrobat Sign notifications in a Teams Channel
    3. Get your Adobe Acrobat Sign notifications in Slack
    4. Get your Adobe Acrobat Sign notifications in Webex
  6. Agreement generation
    1. Generate document from Power App form and Word template, send for signature
    2. Generate agreement from Word template in OneDrive, and get signature
    3. Generate agreement for selected Excel row, send for review and signature
Custom Send workflows
Share users and agreements
1. Share a user
2. Share agreements

Integrate with other products

Acrobat Sign Developer

REST APIs
Webhooks

Support and Troubleshooting

Overview

A webhook is a user-defined HTTPS request triggered when a subscribed event occurs at the source site (Adobe Acrobat Sign, in this case).

Effectively, a webhook is nothing but a REST service that accepts data or a stream of data.

Webhooks are meant for service-to-service communication in a PUSH model.

When a subscribed event is triggered, Acrobat Sign constructs an HTTPS POST with a JSON body and delivers that to the URL specified.

Before configuring webhooks, make sure that your network will accept the IP ranges needed for functionality.

Webhooks offer multiple benefits over the previous callback method, some of which are:

Admins can enable their webhooks without having to involve Acrobat Sign support to list the callback URL
Webhooks are better in terms of data "freshness," the efficiency of communication, and security. No polling required
Webhooks allow for different levels of scope (Account/Group/User/Resource) easily.
Webhooks are a more modern API solution, allowing for a more straightforward configuration of modern applications
Multiple webhooks can be configured per scope (Account/Group/User/Resource), where Callbacks were required to be unique
Webhooks allow for the selection of the data to be returned, where callbacks are an "all or nothing" solution
Metadata carried with a webhook can be configured (Basic or Detailed)
Webhooks are far easier to create, edit, or disable as needed since the UI is entirely within the control of the admin.

Note:

This document is primarily focused on the Webhooks UI in the Acrobat Sign web application (Previously Adobe Sign).

Developers that are looking for API details can find more information here:

REST v6 details

Prerequisites

You must allow the IP ranges for webhooks through your network security for the service to work.

The legacy callback URL service in REST v5 uses the same IP ranges as the webhook service.

Administrators can log in to the Adobe Admin Console to add users. Once logged in, navigate to the administrator's menu and scroll down to Webhooks.

How it's used

Admins will first need to have a webhook service, ready to accept the inbound push from Acrobat Sign. There are many options in this regard, and as long as the service can accept POST and GET requests, the webhook will be successful.

Once the service is in place, an Acrobat Sign admin can create a new webhook from the Webhook interface in the Account menu of the Acrobat Sign site.

Admins can configure the webhook to trigger for Agreement, Web form (Widget), or Send in Bulk (MegaSign) events. Library Template (Library Document) resource can also be configured through the API.

The scope of the webhook can include the whole account or individual groups through the admin interface. The API allows for more granularity through the selection of USER or RESOURCE scopes.

The type of data that is pushed to the URL is configurable and can include things like the Agreement Info, Participant Info, the Document Info, and so on.

Once the webhook is configured and saved, Acrobat Sign will push a new JSON object to the defined URL every time the subscribed event is triggered. No ongoing manipulation of the webhook is required unless you want to change the event trigger criteria or the JSON payload.

Verification of intent of the webhook URL

Before registering a webhook successfully, Acrobat Sign verifies whether the webhook URL that is provided in the registration request intends to receive notifications or not. For this purpose, when Acrobat Sign receives a new webhook registration request, it first makes a verification request to the webhook URL. This verification request is an HTTPS GET request sent to the webhook URL. This request has a custom HTTP header X-AdobeSign-ClientId. The value in this header is set to the client ID (Application ID) of the API application requesting to create/register the webhook. To successfully register a webhook, the webhook URL must respond to this verification request with a 2XX response code, AND additionally, it MUST send back the same client id value in one of the following two ways:

Either in a response header X-AdobeSign-ClientId. This is the same header passed in the request and echoed back in the response.
Or in the JSON response body with the key of xAdobeSignClientId and its value being the same client ID sent in the request.

The webhook will be successfully registered only on a success response(2XX response code) and validation of client id either in header or response body. The purpose of this verification request is to demonstrate that your webhook URL does want to receive notifications at that URL. If you accidentally entered the wrong URL, the URL would fail to respond correctly to the verification of intent request, and Acrobat Sign will not send any notifications to that URL. Additionally, the webhook URL can also validate that it would receive notifications only through the webhooks registered by a specific application. This can be done by validating the client ID of the application passed in the X-AdobeSign-ClientId header. If the webhook URL does not recognize that client id, it MUST NOT respond with the success response code, and Acrobat Sign will take care that the URL is not registered as a webhook.

The verification of the webhook URL call will be made in the following scenarios:

Registering Webhook: If this verification of the webhook URL call fails, the webhook will not be created.
Updating Webhook: INACTIVE to ACTIVE: If this verification of the webhook URL call fails, the webhook state will not be changed to ACTIVE.

How to respond to a webhook notification

Acrobat Sign performs an implicit verification of intent in each webhook notification request sent to the webhook URL. Thus, every webhook notification HTTPS request also contains the custom HTTP header called X-AdobeSign-ClientId. The value of this header is the client id (Application ID) of the application that created the webhook. We will consider the webhook notification successfully delivered if, and only if, a success response (2XX response code) is returned and the client id is sent in either the HTTP header (X-AdobeSign-ClientId) or via a JSON response body with key as xAdobeSignClientId and value as the same client id; otherwise we will retry to deliver the notification to the webhook URL until the retries are exhausted.

As mentioned above, the header 'X-AdobeSign-ClientId' which is included in every notification request from Sign, the value of this header(client id) should be echoed back in response in either of two ways:

1. HTTP header X-AdobeSign-ClientId and value as this client id

Sample Javascript code to to fetch the client id, validate it, and then return it in the response header
// Fetch client id var clientid = request.headers['X-ADOBESIGN-CLIENTID']; //Validate it if (clientid ==="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { //Return it in response header response.headers['X-AdobeSign-ClientId'] = clientid; response.status = 200; // default value }

Sample PHP code to to fetch the client id, validate it, and then return it in the response header
<?php // Fetch client id $clientid = $_SERVER['HTTP_X_ADOBESIGN_CLIENTID']; //Validate it if($clientid == "BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { //Return it in response header header("X-AdobeSign-ClientId:$clientid"); header("HTTP/1.1 200 OK"); // default value } ?>

2. JSON response body with key as xAdobeSignClientId and value as the same client id

Sample Javascript code to to fetch the client id, validate it, and return it in the response body
// Fetch client id var clientid = request.headers['X-ADOBESIGN-CLIENTID']; //Validate it if (clientid ==="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { var responseBody = { "xAdobeSignClientId" : clientid // Return Client Id in the body }; response.headers['Content-Type'] = 'application/json'; response.body = responseBody; response.status = 200; }

Sample Javascript code to to fetch the client id, validate it, and return it in the response body

// Fetch client id

var clientid = request.headers['X-ADOBESIGN-CLIENTID'];

//Validate it

if (clientid ==="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created

{

var responseBody = {

"xAdobeSignClientId" : clientid // Return Client Id in the body

};

response.headers['Content-Type'] = 'application/json';

response.body = responseBody;

response.status = 200;

}

Sample PHP code to to fetch the client id, validate it, and return it in the response body
<?php // Fetch client id $clientid = $_SERVER['HTTP_X_ADOBESIGN_CLIENTID']; //Validate it if($clientid == "BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { //Return it in response body header("Content-Type: application/json"); $body = array('xAdobeSignClientId' => $clientid); echo json_encode($body); header("HTTP/1.1 200 OK"); // default value } ?>

Sample PHP code to to fetch the client id, validate it, and return it in the response body

<?php

// Fetch client id

$clientid = $_SERVER['HTTP_X_ADOBESIGN_CLIENTID'];

//Validate it

if($clientid == "BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created

{

//Return it in response body

header("Content-Type: application/json");

$body = array('xAdobeSignClientId' => $clientid);

echo json_encode($body);

header("HTTP/1.1 200 OK"); // default value

}

Sample JSON body of the response
{ "xAdobeSignClientId": "BGBQIIE7H253K6" }

Prerequisites

You will need:

A Microsoft account with license to create Azure Functions Applications
An existing Azure Function Application, you can create one using https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-first-azure-function
Basic knowledge of Javascript, so that you can understand and write the code in any language of your choice

Steps to create an Azure Functions Trigger that serves as an Acrobat Sign webhook

To create a Javascript HTTP Trigger function:

1. Login via you Microsoft account https://portal.azure.com/

2. Open you Azure Function Application displayed under Function Apps tab.

This will open your list of Azure Function Applications:

3. Choose the application where in you want to create this new function

4. Click on the Create (+) button to create a new Azure function

5. Select Webhook + API as the scenario and Javascript as the language

6. Click Create this function

A new function that has the capability of handling an incoming API request is created.

Add logic to register Acrobat Sign webhook

Before registering a webhook successfully, Acrobat Sign verifies that the webhook URL that is provided in the registration request, really intends to receive notifications or not. For this purpose, when a new webhook registration request is received by Acrobat Sign, it first makes a verification request to the webhook URL. This verification request is an HTTPS GET request sent to the webhook URL with a custom HTTP header X-AdobeSign-ClientId. The value in this header is set to the client ID of the application that is requesting to create/register the webhook. To successfully register a webhook, the webhook URL must respond to this verification request with a 2XX response code AND additionally it must send back the same client id value in one of the following two ways.

There are two options you can follow:

Option 1: Pass Client Id in X-AdobeSign-ClientId as response Header

Pass X-AdobeSign-ClientId in the response header. This is the same header which was passed in the request, and must be echoed back in the response.

Replace the Index.js file with the following:

module.exports = function (context, req) {

var clientId = req.headers['x-adobesign-clientid'];

// Validate that the incoming ClientID is genuine

if (clientId === '123XXX456') {

context.res = {

// status: 200, /* Defaults to 200 */ // any 2XX response is acceptable

body: "Notification Accepted",

headers : {

'x-adobesign-clientid' : req.headers['x-adobesign-clientid']

}

};

}

else {

context.res = {

status: 400,

body: "Opps!! Illegitimate Call identified"

};

}

context.done();

};

Test the behavior by mocking the request:

1. Click on the Test button at extreme right corner

2. Mock the dummy request

Although response headers are not shown above but you can observe it via mocking it by postman/DHC or any other service.

Option 2: Pass Client Id in the response body with key xAdobeSignClientId

In the JSON response body with the key of xAdobeSignClientId and its value being the same client ID that was sent in the request header.

Replace the Index.js file with the following:

module.exports = function (context, req) {

var clientId = req.headers['x-adobesign-clientid'];

// Validate that the incoming ClientID is genuine

if (clientId === '123XXX456') {

context.res = {

// status: 200, /* Defaults to 200 */ // any 2XX response is acceptable

body: {

'xAdobeSignClientId' : clientId

headers : {

'Content-Type' : 'application/json'

}

};

}

else {

context.res = {

status: 400,

body: "Opps!! Illegitimate Call identified"

};

}

context.done();

};

Test the behavior by mocking the request

1. Click on the Test button at extreme right corner

2. Mock the dummy request

Also note the same behavior for clientID is expected when the Webhook URL receives POST notifications.

Ready to Use

Once you have verified the behavior, the webhook URL is functional as per Acrobat Sign standards. You can further update the custom logic as per your requirements.

Get the Function URL

Click on Get function URL

Copy the URL and use it for creating webhooks in Acrobat Sign.

Creating the AWS Lambda function

To create an AWS Lambda function, login to your AWS Management Console and select the AWS Lambda service from the services list.

Click Create a Lambda function using "Author From Scratch" option
In the Configure function page enter the function name "lambdaWebhooks" and select Node.js 4.3 as the Runtime
For the Role choose an existing role or create a new role from template(s)
- If you have chosen Create new role from template(s) enter a role name (e.g. role-lamda) and select Simple Microservices permissions from the Policy templates list
Click the Create function button

On the new AWS lamda function page, select "Edit code inline" as "Code entry type", keep the index.handler as Handler.
Add logic to register the Acrobat Sign Webhook
Before registering a webhook successfully, Acrobat Sign verifies that the webhook URL that is provided in the registration request, really intends to receive notifications or not. For this purpose, when a new webhook registration request is received by Acrobat Sign, it first makes a verification request to the webhook URL. This verification request is an HTTPS GET request sent to the webhook URL with a custom HTTP header X-AdobeSign-ClientId. The value in this header is set to the client ID of the application that is requesting to create/register the webhook. To successfully register a webhook, the webhook URL must respond to this verification request with a 2XX response code AND additionally it must send back the same client id value in one of the following two ways. Also note the same behavior for clientID is expected when the Webhook URL receives POST notifications.

Follow either of the two cases:

Case 1: Pass Client Id in X-AdobeSign-ClientId as response Header
- Pass X-AdobeSign-ClientId in the response header. This is the same header which was passed in the request, and must be echoed back in the response.
  
  Code Snippet
  In index.js file, replace the automatically generated code snippet with the following code:

Sample node JS code to to fetch the client id, validate it, and then return it in the response header
exports.handler = function index(event, context, callback) { // Fetch client id var clientid = event.headers['X-AdobeSign-ClientId']; //Validate it if (clientid =="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { var response = { statusCode: 200, headers: { "X-AdobeSign-ClientId": clientid } }; callback(null,response); } else { callback("Oops!! illegitimate call"); } }

Sample node JS code to to fetch the client id, validate it, and then return it in the response header

exports.handler = function index(event, context, callback) {

// Fetch client id

var clientid = event.headers['X-AdobeSign-ClientId'];

//Validate it

if (clientid =="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created

{

var response = {

statusCode: 200,

headers: {

"X-AdobeSign-ClientId": clientid

}

};

callback(null,response);

}

else {

callback("Oops!! illegitimate call");

}

Case 2: Pass Client Id in the response body with key xAdobeSignClientId

In the JSON response body with the key of xAdobeSignClientId and its value being the same client ID that was sent in the request header.

Code Snippet

Replace the Index.js file with the following :

Sample node JS code to to fetch the client id, validate it, and then return it in the response header
exports.handler = function index(event, context, callback) { // Fetch client id var clientid = event.headers['X-AdobeSign-ClientId']; //Validate it if (clientid =="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created { var responseBody = { xAdobeSignClientId : clientid }; var response = { statusCode: 200, body: JSON.stringify(responseBody) }; callback(null,response); } else { callback("Opps!! illegitimate call"); } }

Sample node JS code to to fetch the client id, validate it, and then return it in the response header

exports.handler = function index(event, context, callback) {

// Fetch client id

var clientid = event.headers['X-AdobeSign-ClientId'];

//Validate it

if (clientid =="BGBQIIE7H253K6") //Replace 'BGBQIIE7H253K6' with the client id of the application using which the webhook is created

{

var responseBody = {

xAdobeSignClientId : clientid

};

var response = {

statusCode: 200,

body: JSON.stringify(responseBody)

};

callback(null,response);

}

else {

callback("Opps!! illegitimate call");

}

Save the function. Lambda function is created and we are almost ready to use it in a real-time webhook.

Configuring the AWS API Gateway

To make this Lambda publicly accessible through an HTTP method, we need to configure the AWS API Gateway using our function(created above) as the backend for the API.

In AWS Management Console select the API Gateway from the AWS services and click Create API button

In the Create new API page select New API and enter webhooks as the API name.
Click the Create API button
Select the Actions drop-down list and select the Create Resource option
Check the Configure as proxy resource option and enter validate as the Resource Name and {proxy+} in the Resource Path
Leave the Enable API Gateway CORS option unchecked and click the Create Resource button
Keep the Lambda Function Proxy selected as Integration type and select the region where you have created your Lambda function in the Lambda region drop-down list (probably it's the same region where you are creating the API Gateway).
Enter validate as the Lambda Function and click the Save button
In the Add Permission to Lambda Function pop-up window select OK

If all the above steps are executed successfully, you'll see something like this:

Deploying API

The next step is deploying this API so it becomes ready to use.

In the Actions drop-down select Deploy API
Select [New Stage] in the Deployment stage and enter prod (or anything you like to identify this stage) in the Stage name
Click the Deploy button

API is now ready to use and you can find the invoke URL in the blue box as shown below:

Take note of this URL as you'll need to enter it as your real-time webhook URL.

Ready to Use

It's done. Use this above url with "/{nodeJSfunctionName}" appended as webhook url in POST /webhooks API request. Once you have verified the behavior, the Webhook URL is functional as per
Acrobat Sign standards. You can further update/add the custom logic as per your requirement.

How to enable or disable

Access to the Webhooks feature is enabled by default for enterprise tier accounts.

Group-level admins can create/control the Webhooks that operate within their group only.

Access to the Webhooks page can be found in the left rail of the Admin menu.

Concurrency-based rate limiting

Webhook (and callback) creation and notification events are limited in the number of concurrent notifications that are actively being delivered to the customer from the Acrobat Sign system. This limit applies to the account, to include all groups within the account.
This type of rate limiting prevents one poorly designed account from consuming a disproportionate amount of server resources, thereby negatively impacting all other customers in that server environment.

The number of concurrent events per account has been calculated to ensure that accounts with well-behaved webhooks will receive their notifications in the shortest amount of time and should rarely encounter a situation where notifications are delayed due to too many requests. The current thresholds are:

Action (Event)	Maximum concurrent events	Description
Webhook creation	10	At most, 10 concurrent webhook creation requests are allowed per Account. Requests exceeding this limit will result in a 429 TOO_MANY_REQUESTS response code.
Webhook/callback notification	30	At most 30 concurrent webhook and callback notifications are allowed per Account. Notifications exceeding this limit will retry according to exponential backoff until they are delivered.

Best Practices

Subscribe to specific, needed events to limit the number of HTTPS requests to the server - The more specific you can make your webhooks, the less volume you'll need to sift through.
Be duplicate resistant - If you have more than one app sharing the same webhook URL and the same user mapped to each app, the same event will be sent to your webhook multiple times (once per app). In some cases, your webhook may receive duplicate events. Your webhook application should be tolerant of this and dedupe by event ID.
Always respond to webhooks quickly - Your app only has five seconds to respond to webhook requests. For the verification request, this is rarely an issue, since your app doesn't need to do any real work to respond. For notification requests, however, your app will usually do something that takes time in response to the request. It is recommended to work on a separate thread or asynchronously using a queue to ensure you can respond within five seconds
Manage concurrency - When a user makes a number of changes in rapid succession, your app is likely to receive multiple notifications for the same user at roughly the same time. If you're not careful about how you manage concurrency, your app can end up processing the same changes for the same user more than once. In order to take advantage of Acrobat Sign webhooks, a clear understanding of the use of the information needs to be understood. Be sure to ask questions such as:
- What data do you want to return in the payload?
- Who will be accessing this information?
- What decisions or reporting will be generated?
Recommendations for receiving a signed document - There are several factors to consider when determining how to receive a signed PDF from Acrobat Sign in your document management system.

While it is perfectly acceptable to just select the Agreement Signed Document option while creating a webhook, you might consider using the Acrobat Sign API to retrieve the documents when a triggering event (such as agreement status Complete) is received.

Things to keep in mind...

JSON size limitation

The JSON payload size is limited to 10 MB.

If an event generates a larger payload, a webhook will be triggered but the conditional parameter attributes, if there in the request, will be removed to reduce the size of the payload.

"ConditionalParametersTrimmed " will be returned in the response when this happens to inform the client that the conditionalParameters info has been removed.

“conditionalParametersTrimmed” is an array object containing the information about the keys that have been trimmed.

The truncation will be done in following order :

includeSignedDocuments
includeParticipantsInfo
includeDocumentsInfo
includeDetailedInfo

Signed Documents will be truncated first, followed by participant info, document info and finally detailed info.

This may happen, for example, on an agreement completion event if it includes signed document (base 64 encoded) as well or for an agreement with multiple form fields

Webhook notifications

Acrobat Sign webhooks deliver notifications to the sender of the agreement, and any webhook configured within the group from which the agreement was sent. Account scoped webhooks receive all events.

Sender: User A | Signer: User B | Sharee: User C

User A and User B are in different accounts

User A and User C are in different accounts

Use-case	Notification?	Comments/Notes
User A's account has ACCOUNT level webhook (created by User A or Account Admin).	Yes	An ACCOUNT level webhook gets notified of all events triggered in that account.
User A's account has GROUP level webhook (created by User A or Account/Group Admin). Assumption: User A & Group Admin are in the same group.	Yes	A GROUP level webhook gets notified of all events triggered in that group.
User A has USER level webhook.	Yes	As the Sender, User A's USER level webhook is triggered
User A has RESOURCE level webhook (for above-sent agreement).	Yes

User B's account has ACCOUNT level webhook (created by User B or Account Admin).	No	User B's ACCOUNT level webhook is considered a Signer webhook.
User B's account has GROUP level webhook (created by User B or Account/Group Admin). Assumption: User B & Group Admin are in the same group.	No	User B's GROUP level webhook is considered a Signer webhook.
User B has USER level webhook.	No	User B's USER level webhook is considered a Signer webhook.

User C's account has ACCOUNT level webhook (created by User C or Account Admin).	No	User C's ACCOUNT level webhook is considered a non-originator webhook.
User C's account has GROUP level webhook (created by User C or Account/Group Admin). Assumption: User C & Group Admin are in the same group.	No	User C's GROUP level webhook is considered a non-originator webhook.
User C has USER level webhook.	No	User C's USER level webhook is considered a non-originator webhook.

Sender: User A | Signer: User B | Sharee: User C

User A, User B, and User C are in the same account

Use-case	Notification?	Notes
User A's account has ACCOUNT level webhook (created by User A or Account Admin).	Yes	ACCOUNT level webhooks notify for events triggerd by the account.
User A's account has GROUP level webhook (created by User A or Account/Group Admin). Assumption: User A & Group Admin are in same group.	Yes	GROUP level webhooks notify for events triggerd by the users in their group.
User A has USER level webhook.	Yes	As the Sender, User A's User level webhook is triggered
User A has RESOURCE level webhook (for the above sent agreement).	Yes

User B's account has ACCOUNT level webhook (created by User B or Account Admin).	Yes	Since User A and User B are in the same account, an ACCOUNT level webhook gets notified of all events triggered in that account.
User B's account has GROUP level webhook (created by User B or Account/Group Admin). Assumption: User A, User B & Group Admin are in same group.	Yes	Since User A & User B are in the same group, a GROUP level webhook gets notified of all events triggered in that group.
User B's account has GROUP level webhook (created by User B or Account/Group Admin). Assumption: User A & User B are in different groups.	No	User B's GROUP level webhook is considered a Signer webhook. User A's webhook (RESOURCE/USER/GROUP/ACCOUNT) will be triggered.
User B has USER level webhook.	No	As a recipient, User B's USER level webhook is not triggered.

User C's account has ACCOUNT level webhook (created by User C or Account Admin).	Yes	Since User A and User C are in the same account, an ACCOUNT level webhook gets notified of all events triggered in that account.
User C's account has GROUP level webhook (created by User C or Account/Group Admin). Assumption: User A, User C & Group Admin are in same group.	Yes	Since User A and User C are in the same group, a GROUP level webhook gets notified of all events triggered in that group.
User C's account has GROUP level webhook (created by User C or Account/Group Admin). Assumption: User A & User C are in different groups.	No	User C's GROUP level webhook is considered a non-originator webhook. User A's webhook (RESOURCE/USER/GROUP/ACCOUNT) will be triggered.
User C has USER level webhook.	No	User C's USER level webhook is considered a non-originator webhook.

Retry when the listening service is down

If the target URL for the webhook is down for any reason, Acrobat Sign will queue the JSON and retry the push in a progressive cycle over 72 hours.

The undelivered events will be persisted in a retry queue and a best effort will be made over the next 72 hours to deliver the notifications in the order they occurred.

The strategy for retrying delivery of notifications is a doubling of time between attempts, starting with a 1-minute interval increasing to every 12 hours, resulting in 15 retries in the space of 72 hours.

If the webhook receiver fails to respond within 72 hours, and there have been no successful notification deliveries in the last seven days, the webhook will be disabled. No notifications will be sent to this URL until the webhook is activated again.

All notifications between the time the webhook is disabled and subsequently enabled again will be lost.

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Acrobat Sign Webhook overview

Overview

Prerequisites

How it's used

Verification of intent of the webhook URL

How to respond to a webhook notification

1. HTTP header X-AdobeSign-ClientId and value as this client id

2. JSON response body with key as xAdobeSignClientId and value as the same client id

Prerequisites

Steps to create an Azure Functions Trigger that serves as an Acrobat Sign webhook

Add logic to register Acrobat Sign webhook

Option 1: Pass Client Id in X-AdobeSign-ClientId as response Header

Option 2: Pass Client Id in the response body with key xAdobeSignClientId

Ready to Use

Creating the AWS Lambda function

Case 1: Pass Client Id in X-AdobeSign-ClientId as response Header

Case 2: Pass Client Id in the response body with key xAdobeSignClientId

Configuring the AWS API Gateway

Deploying API

Ready to Use

How to enable or disable

Concurrency-based rate limiting

Best Practices

Things to keep in mind...

JSON size limitation

Webhook notifications

Retry when the listening service is down

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