Extension Pointers #7: Build third-party integrations by incorporating Custom variables into Widgets

Extension Pointers #7: Build third-party integrations by incorporating Custom variables into Widgets

There are currently a number of third-party applications that can be integrated with Zoho CRM to help improve the existing functionality of the product. Amongst this diverse collection, there are certain applications that only support API key forms for user authentication. If the third-party application that you choose to integrate supports API key forms, Custom variables are the best way to integrate with Zoho CRM. Custom variables are of major importance in scenarios where data needs to be globally accessed across an entire extension, as well as during third-party integrations where security-related, user-specific data needs to be passed in order to establish a successful integration.

Just as custom variables help to integrate Zoho CRM with third-party applications, widgets are built-in UI components that help you customize your own UI interface and perform certain functions using third-party data.

In this post, we'll look at how to use custom variables while building widgets, in order to synchronize the third-party data seamlessly into Zoho CRM components in a personalized format.

Consider, for example, a widget that needs to display the services and technologies of the company to which a Zoho CRM lead belongs. These details help to target and serve the leads based on a data-driven approach, and thereby run b2b marketing efficiently. In our example, Clearbit is the third-party application that is used as a source of data enrichment.

Let's go through the steps to achieve the above-mentioned functionality.

Create a Custom Variable to store the API key value

In order to establish a connection with the Clearbit application and retrieve its data, we first need to register with Clearbit and obtain the API Secret Key. Upon successful acquisition of the API Key, we'll create a custom variable to store its value in the extension.

1. Go to the Extension's Detail page in Zoho Developer Console.
2. Choose Custom Properties from the left panel of the Zoho Developer console under Build, then click Create your first CRM variable.



3. Provide the Custom Variable Name and the Clearbit API secret key as the value.
4. Click Save.


The custom variable "API Key" will be created with an auto-generated API name.
Note: clearbitextension__API_Key is the API Name in our example.



Create a widget that fetches the details of a company
  • Create a widget called "ClearbitProject" in ZET CLI. 
  • Add the necessary HTML and CSS files (handle the UI) along with the JS file (business logic) to get the company details of the lead. Refer here to check out the step-by-step guide to create a widget in ZET CLI . 

  • Add the ZohoEmbeddedAppSDK.min.js file (available here) to use the JS SDKs that are needed for your project.
  • Please refer to JS SDK for information on the different Zoho CRM APIs supported by the SDK. These APIs are significant in helping the Javascript code interact with Zoho CRM.


Clearbit.js code snippet
 var comp;
 var json;
 var jsonObj;
 var orgVal;
 function initializeWidget()
 {  
 // PageLoad listener that returns the entity details of the active page
 ZOHO.embeddedApp.on("PageLoad",function(data)
 {
 console.log("inside function");
 id = data.EntityId;
 console.log("id===="+id);
 entity = data.Entity;
 // Get the record details of the entity using the value returned by pageload listener
 ZOHO.CRM.API.getRecord({
 Entity: entity,
 RecordID: id
 }).then(function(data) {
 // Fetch the company detail from the response obtained through getRecord API 
 var recorddata= data.data[0];
 comp=recorddata.Company;
 // Get the API Key detailsfrom the custom variable 
 ZOHO.CRM.API.getOrgVariable("clearbitextension__API_Key").then(function(data){
 org=data.Success;
 //Store the API key value to a variable based on the format required by Clearbit API  
 orgVal="Bearer "+org.Content;
 })
 setTimeout(function(){
 // Construct the params as required by Clearbit API
 var request ={
 headers:{
 Authorization : orgVal,
 }
 }
 // Invoke HTTP get to receive the response of the initiated request i.e the Clearbit API  call
 ZOHO.CRM.HTTP.get(request).then(function(data) {
 jsonObj = JSON.parse(data);
 console.log(jsonObj);
 respPrint(jsonObj);
 })
 },500)
 })  
 })
 // Extract the required information from Clearbit API response and format  the data in UI
 function respPrint(jsonObj){
 jsonObj.tags.map(function(value,index){
 var sub_list = document.createElement('div');
 sub_list.classList.add('sub-list');
 sub_list.innerText = value;
 document.getElementById('list_tags').appendChild(sub_list);
 });
 jsonObj.techCategories.map(function(value,index){
 var sub_list = document.createElement('div');
 sub_list.classList.add('sub-list');
 sub_list.innerText = value;
 document.getElementById('list_technologies').appendChild(sub_list);
 });
 }
 ZOHO.embeddedApp.init();
 }

Multiple Zoho CRM APIs are a part of the above-mentioned Clearbit Javascript code snippet. Collectively, these APIs help to implement the business logic of retrieving the company details of the selected lead. Let's take a look at these APIs.

ZOHO.embeddedApp.on("PageLoad",function(data)) - An event listener that is triggered whenever an entity Page (Details Page) is loaded.
ZOHO.CRM.API.getRecord(config) - API that gets all details of a record when providing the entity and record ID information.
ZOHO.CRM.API.getOrgVariable()- API that returns the data with respect to the custom variable passed to it.
ZOHO.CRM.HTTP.get(request) - The API invokes HTTP GET and returns a response based on the request object passed to it as a parameter. The request object is constructed as a combination of request params and request headers of the respective API.
  • In our example, PageLoad listener is used to fetch the entity and ID of the record in an active page. Upon passing the retrieved entity and ID to the getRecordAPI, the complete record information is gathered, from which we fetch the company name of the selected lead.
  • The retrieved company's name is passed to the URL call as the domain, along with the headers required by Clearbit API. This is bundled together and constructed as the request parameter for the HTTP GET API.
  • The HTTP GET API is invoked, and it returns the response (enriched company details) based on the request parameter.
  • Finally, the required data is extracted from the response and displayed in the widget UI, as per your requirement.
After adding all the necessary files, validate and pack the project.

Associate the widget with a connected app and host it

After successfully building the widget, we can now associate it with a connected app in the extension.

1. Choose Connected Apps from the left panel of the Zoho Developer console, under Utilities.
2. Provide the necessary details for the Connected App. Upload the ClearbitProject.zip file from the dist folder and click Save.




Embed the widget as a related list in Zoho CRM

Now that the widget is associated with a connected app, let's embed it inside Zoho CRM. In our example, we'll embed the widget as a related list called Company Enriched Data in the Leadsmodule.

1. Choose Components from the left panel of the Zoho Developer console, under Build.
2. Choose the Related Details tab and select Add Widgets.
3. Provide the necessary details, choose the "Leads" module, and click Save.



4. Test the widget's functionality locally in an isolated sandbox environment using Test your Extension option.
Note: It's important to keep the localhost running in ZET CLI using the zet run command.

In the sandbox environment:

1. Click the Leads module and choose a lead. Here, we have chosen the lead "TestCustomer New" belonging to the company "Microsoft".



2. Select the related list Company Enriched Data that includes our ClearbitProject widget.



The resulting data of the ClearbitProject widget, namely the services, tags, and technologies offered by Microsoft, to which our lead "TestCustomer New" belongs, will be populated and displayed .

Note: As part of the development process of the extension, we have set the value of the custom variable "API Key" with the API secret key obtained. After development, when planning to publish and share the extension either publicly or privately, it's important to make sure that the value is set empty to ensure that users provide their own secret API key while installing the extension.Refer here to learn more about handling custom variables.



With these steps, custom variables can be incorporated into widgets to perform third-party integrations. You can alter and enhance the widget's functionality as per your requirement. Keep following this space for more info!

SEE ALSO






    Access your files securely from anywhere

        All-in-one knowledge management and training platform for your employees and customers.







                              Zoho Developer Community




                                                    • Desk Community Learning Series


                                                    • Digest


                                                    • Functions


                                                    • Meetups


                                                    • Kbase


                                                    • Resources


                                                    • Glossary


                                                    • Desk Marketplace


                                                    • MVP Corner


                                                    • Word of the Day


                                                    • Ask the Experts



                                                              • Sticky Posts

                                                              • Kaizen #198: Using Client Script for Custom Validation in Blueprint

                                                                Nearing 200th Kaizen Post – 1 More to the Big Two-Oh-Oh! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.
                                                              • Kaizen #226: Using ZRC in Client Script

                                                                Hello everyone! Welcome to another week of Kaizen. In today's post, lets see what is ZRC (Zoho Request Client) and how we can use ZRC methods in Client Script to get inputs from a Salesperson and update the Lead status with a single button click. In this
                                                              • Kaizen #222 - Client Script Support for Notes Related List

                                                                Hello everyone! Welcome to another week of Kaizen. The final Kaizen post of the year 2025 is here! With the new Client Script support for the Notes Related List, you can validate, enrich, and manage notes across modules. In this post, we’ll explore how
                                                              • Kaizen #217 - Actions APIs : Tasks

                                                                Welcome to another week of Kaizen! In last week's post we discussed Email Notifications APIs which act as the link between your Workflow automations and you. We have discussed how Zylker Cloud Services uses Email Notifications API in their custom dashboard.
                                                              • Kaizen #216 - Actions APIs : Email Notifications

                                                                Welcome to another week of Kaizen! For the last three weeks, we have been discussing Zylker's workflows. We successfully updated a dormant workflow, built a new one from the ground up and more. But our work is not finished—these automated processes are


                                                              Manage your brands on social media



                                                                    Zoho TeamInbox Resources



                                                                        Zoho CRM Plus Resources

                                                                          Zoho Books Resources


                                                                            Zoho Subscriptions Resources

                                                                              Zoho Projects Resources


                                                                                Zoho Sprints Resources


                                                                                  Qntrl Resources


                                                                                    Zoho Creator Resources



                                                                                        Zoho CRM Resources

                                                                                        • CRM Community Learning Series

                                                                                          CRM Community Learning Series


                                                                                        • Kaizen

                                                                                          Kaizen

                                                                                        • Functions

                                                                                          Functions

                                                                                        • Meetups

                                                                                          Meetups

                                                                                        • Kbase

                                                                                          Kbase

                                                                                        • Resources

                                                                                          Resources

                                                                                        • Digest

                                                                                          Digest

                                                                                        • CRM Marketplace

                                                                                          CRM Marketplace

                                                                                        • MVP Corner

                                                                                          MVP Corner









                                                                                            Design. Discuss. Deliver.

                                                                                            Create visually engaging stories with Zoho Show.

                                                                                            Get Started Now


                                                                                              Zoho Show Resources

                                                                                                Zoho Writer

                                                                                                Get Started. Write Away!

                                                                                                Writer is a powerful online word processor, designed for collaborative work.

                                                                                                  Zoho CRM コンテンツ




                                                                                                    Nederlandse Hulpbronnen


                                                                                                        ご検討中の方




                                                                                                                • Recent Topics

                                                                                                                • Email was sent out without our permission

                                                                                                                  Hi there, One customer just reached out to us about this email that we were not aware was being sent to our customers. Can you please check on your end?
                                                                                                                • Flexible Partial-Use Coupons (Stored Value Credits)

                                                                                                                  Subject: Feature Request: Ability for users to apply partial coupon balances per transaction Problem Statement Currently, our coupons are "one-and-done." If a user has a $50 coupon but only spends $30, they either lose the remaining $20 or are forced
                                                                                                                • Prevent accidental duplicate entry of Customer Ordersome

                                                                                                                  Zoho Support has confirmed that Zoho currently does not have any method (using Deluge, flow or any other method) to alert a user when a sales order has been entered twice using the same customer reference number (i.e. a duplicate). Most ERP platforms
                                                                                                                • Customizing Helpcenter texts

                                                                                                                  I’m customizing the Zoho Desk Help Center and I’d like to change the wording of the standard widgets – for example, the text in the “Submit Ticket” banner that appears in the footer, or other built-in widget labels and messages. So far, I haven’t found
                                                                                                                • Migrating Brevo Automation Logic to Zoho Campaigns

                                                                                                                  Hello Zoho Campaigns Support Team, I am in the process of migrating my email marketing from Brevo to Zoho Campaigns. I have around 10,000 contacts, which I have already successfully exported from Brevo and imported into Zoho Campaigns. I now need guidance
                                                                                                                • Is there a way to delete workspaces?

                                                                                                                  I want to remove one of the workspaces in my Campaigns account. I don't see any obvious way to do this. Am I missing something?
                                                                                                                • Boost your Zoho Desk's performance by archiving tickets!

                                                                                                                  The longer your help desk operations are, the more likely it is to accumulate tickets that are no longer relevant. For example, ticket records from a year ago are typically less relevant than currently open tickets. Such old tickets may eventually lead
                                                                                                                • Collapsing and expanding of lists and paragraphs

                                                                                                                  hello Would you ever implement Collapsing and expanding of lists and paragraphs in zoho writer ? Best regards
                                                                                                                • New Custom View -Sorting the Custom fields

                                                                                                                  While creating a New Custom View in invoice , Customers, Bills ,expense etc , the sorting of custom fields are not available , a query function "order by / sort by  " may also be included in  Define new criteria module  which will be more beneficial to
                                                                                                                • Make CAMPAIGNS email look as simple as possible

                                                                                                                  Hi there I'm trying to make my Campaigns email look as much like a normal email as possible. I'm a bit stuck with the "justification" of the email email block. Can I LEFT JUSTIFY the "whole email" to make it look "normal"? (Please see screenshot attached)
                                                                                                                • [Webinar] Top 10 Most Used Zoho Analytics Features in 2025

                                                                                                                  Zoho Analytics has evolved significantly over the past year. Discover the most widely adopted features in Zoho Analytics in 2025, based on real customer usage patterns, best practices, and high-impact use cases. Learn how leading teams are turning data
                                                                                                                • Sorry! we encountered some problems while sending your campaign. It will be sent automatically once we are ready. We apologize for the delay caused.

                                                                                                                  Hello. Lately we are having problems with some campaigns, which show us this error message. Sorry! we encountered some problems while sending your campaign. It will be sent automatically once we are ready. We apologize for the delay caused. We can't find
                                                                                                                • Can I remove or divert certain contacts from an active Campaigns workflow?

                                                                                                                  I have created a workflow in Zoho Campaigns, which sends different emails, once contacts have been added to a mailing list. To choose which email to send to the contacts, there are conditions, which divert contacts based on their company type and their company size. There was a subsection of this workflow, where company size wasn't selected correctly, and some contacts have been sent down the wrong path and received the wrong email. The workflow contains a reminder loop and a further series of emails.
                                                                                                                • File Upload field automatically replaces spaces with underscores – support experience

                                                                                                                  Hi everyone, I want to share my recent experience regarding the File Upload field behavior in Zoho Creator and my interaction with the Zoho support team. When a user uploads a file, the system automatically renames the document by replacing spaces in
                                                                                                                • How to map fields from Zoho Recruit to Zoho People

                                                                                                                  I've got these fields from my Job Offer that I'm trying to map to the Work information fields in Zoho People, but they arent showing up. For example, how do I get the department name field (in the job post) to map to the work information field in Zoho
                                                                                                                • UTM in zoho campaigns

                                                                                                                  Helloo everybody!!! Someone know how IF ZOHO CAMPAIGNS has UTM for tracking the url of any campaigns. thank u
                                                                                                                • Full Context of Zoho CRM Records for Zia in Zoho Desk for efficient AI Usage

                                                                                                                  Hello everyone, I have a question regarding the use of Zia in Zoho Desk in combination with CRM data. Is it possible to automatically feed the complete context of a CRM record into Zia, so that it can generate automated and highly accurate responses for
                                                                                                                • Knowledge base printing

                                                                                                                  I saw a posting about printing the knowledge base as I was looking for the answer, but we would like the ability to print out the entire knowledge base with a click, keeping the same organization format.   Bonus would include an index of keywords and
                                                                                                                • Search not working!

                                                                                                                  I have items in my notebook tagged but when I search for a tag nothing comes up! Any fix for this?
                                                                                                                • Zoho Books | Product updates | January 2026

                                                                                                                  Hello users, We’ve rolled out new features and enhancements in Zoho Books. From e-filing Form 1099 directly with the IRS to corporation tax support, explore the updates designed to enhance your bookkeeping experience. E-File Form 1099 Directly With the
                                                                                                                • Updates for Zoho Campaigns: Merge tag, footer, and autoresponder migration

                                                                                                                  Hello everyone, We'd like to inform you of some upcoming changes with regard to Zoho Campaigns. We understand that change can be difficult, but we're dedicated to ensuring a smooth transition while keeping you all informed and engaged throughout the process.
                                                                                                                • File Upload field not showing in workflow

                                                                                                                  Hi, I have added a field on Zoho CRM. I want to use it in a workflow where that particular field is updated based on another field, however it is not showing up in the field list to select it in the workflow. Why is this please?
                                                                                                                • Drag 'n' Drop Fields to a Sub-Form and "Move Field To" Option

                                                                                                                  Hi, I would like to be able to move fields from the Main Page to a Sub-Form or from a Sub-Form to either the Main Page or another Sub-Form. Today if you change the design you have to delete and recreate every field, not just move them. Would be nice to
                                                                                                                • How do i integrate google analytics to Zoho Campaigns?

                                                                                                                  Looking to track Zoho Traffic from email Current topic is outdated
                                                                                                                • How do teams manage meeting follow-ups across Zoho tools?

                                                                                                                  We’re using Zoho tools for collaboration and tracking, but managing meeting notes, action items, and follow-ups across teams is still challenging. Curious how others are handling this within Zoho workflows. Are there best practices or integrations that
                                                                                                                • Adding a Deal to and Existing Contact

                                                                                                                  I want to easily add a Deal to an existing Contact. If I click on New Deal on the Contact page this currently this is what happens: All of the mandatory field (and other field) information exists within the Contact. Is there a simple way for it to automatically
                                                                                                                • Zoho Sprint Backlog View, filter by item status

                                                                                                                  Hello, In Zoho Sprints, it would be great to be able filter out specific items in the Backlog based on their status. We would like to track items that were Removed from our backlog without seeing them constantly in the Backlog view, as this view should
                                                                                                                • Customize Colors used on graphs and charts according to users desire.

                                                                                                                  It would be great if we could customize the graph's colors as we see fit. I hate that yellow is always the default color!
                                                                                                                • Let us view and export the full price books data from CRM

                                                                                                                  I quote out of CRM, some of my clients have specialised pricing for specific products - therefore we use Price Books to manage these special prices. I can only see the breakdown of the products listed in the price book and the specialised pricing for
                                                                                                                • Mejoras urgentes para ZOHO MEETING

                                                                                                                  Tengo unos meses usando Zoho Meeting. En general, es buena, pero hay cosas vitales que no logra cumplir con mínima calidad. 1) Calidad de audio y video: urge mejoras. Audio con retraso, imagen borrosa, mal recorte de silueta con fondos virtuales. Además,
                                                                                                                • Multiple header in the quote table???

                                                                                                                  Hello, Is it possible in Zoho CRM to add multiple headers or sections within the Quote product table, so that when the quote is printed it shows separate sections (for example “Products” and “Services”)? To clarify, I’m asking because: This does not appear
                                                                                                                • Saving sent email campaign as PDF

                                                                                                                  I'm looking to add all campaigns sent to an archive folder in sharepoint. Is there anyway to accomplish this in Zoho Flow ? I'm falling at the first hurdle ... can I automatically save a sent campaign as a PDF to a folder location ?
                                                                                                                • Exporting All Custom Functions in ZohoCRM

                                                                                                                  Hello, All I've been looking for a way to keep about 30 functions that I have written in Zoho CRM updated in my own repository to use elsewhere in other instances. A github integration would be great, but a way to export all custom functions or any way
                                                                                                                • How can Data Enrichment be automatically triggered when a new Lead is created in Zoho CRM?

                                                                                                                  Hi, I have a pipeline where a Lead is created automatically through the Zoho API and I've been trying to look for a way to automatically apply Data Enrichment on this created lead. 1) I did not find any way to do this through the Zoho API; it seems like
                                                                                                                • Conditional Layouts On Multi Select Field

                                                                                                                  How we can use Conditional Layouts On Multi Select Field field? Please help.
                                                                                                                • Appreciation to Qntrl Support Team

                                                                                                                  We are writing this topic to appreciate the outstanding level of support from Qntrl Team. We have been using Qntrl since 2022 after shifting from another similar platform. Since we joined Qntrl, the team has shown a high level of professionalism, support,
                                                                                                                • How can I hide "My Requests" and "Marketplace" icon from the side menu

                                                                                                                  Hello everybody, We recently started using the new Zoho CRM for Everyone. How can I hide "My Requests" and "Marketplace" from the side menu? We don't use these features at the moment, and I couldn't find a way to disable or remove them. Best regards,
                                                                                                                • Whatsapp Integration on Zoho Campaign

                                                                                                                  Team: Can the messages from Zoho Campaign delivered through Whatsapp... now customers no longer are active on email, but the entire campaign module is email based.... when will it be available on whatsapp.... are there any thirdparty providers who can
                                                                                                                • Quotes Approval

                                                                                                                  Hey all, Could you please help in the following: When creating quotes, how to configure it in a way, that its approval would work according to the quoted items description, not according to quote information. In my case, the quote should be sent to approval
                                                                                                                • Mandatory Field - but only at conversion

                                                                                                                  Hello! We use Zoho CRM and there are times where the "Lead Created Date & Time" field isn't populated into a "Contractor" (Account is the default phrase i believe). Most of my lead tracking is based on reading the Lead Created field above, so it's important
                                                                                                                • Next Page