Building extensions #5: Integrating applications with Zoho Projects through Connections

Building extensions #5: Integrating applications with Zoho Projects through Connections

In our last post, we discussed the essential features that a Zoho Projects extension can provide. Starting with this post andin every subsequent post going forward, we'll go through each of those features in depth, one by one, with an example use case.
In this post, we'll explore the Connections feature in detail.

Connections: When and why?

Creating a tightly coupled integration requires the establishment of a secure connection between applications. To achieve this secured connection, the Sigma platform provides the Connection feature that can be used to establish a secure link and perform data operations across applications seamlessly and efficiently through an extension.

Use case

Working on development-related tasks might require dealing with a variety of files, such as code snippets, help documents, or service level agreements. While several file management applications are available to securely store and organize data, manually handling file storage between applications remains challenging.

For our example, let's use Zoho Projects to manage all tasks, and Dropbox to manage and store data.

What is the difficulty faced?

Dropbox offers a file request feature that allows you to collect files and organize them into folders. However, as we talked about in our previous post, manually categorizing and uploading task-related files to their respective file request folders in Dropbox would be a time-consuming and laborious activity. Instead, it would be more efficient to integrate Dropbox with Zoho Projects so that uploading task files to Dropbox file request folders can be done instantly from within Zoho Projects.


How can it be sorted?

You can create a connection between Zoho Projects and Dropbox. With the secure connection setup, the file request folders available in Dropbox can be listed on the task details page of Zoho Projects through an extension. You may then easily upload files from Zoho Projects to their corresponding folders in Dropbox, saving time and making you more organized.

What are the components required to achieve this use case?

  1. A connection between Zoho Projects and Dropbox.
  2. An extension configuration that includes:
  • Creating an extension
  • Configuring the plugin manifest
  • Setting up the widget code to display the Dropbox file request folders inside the Zoho Projects task details page.
Now, let's see how we can achieve each of these components.

1. Creating a secure connection using the Connection feature

  • Log in or sign up into developer.zoho.com.
  • Go to Sigma and access your workspace.
  • Once you enter your workspace, select the Connections section in Sigma.
Note: Connections created in Zoho Projects are also accessible within the Connections section in Sigma. These connections can be used in extensions to connect with other applications.

  • Choose the service as Zoho Projects and select your Zoho Projects organization. Click on Create Connection.

  • Sigma offers a list of default services from which you can choose and easily connect with Zoho Projects. If the application you want to integrate isn’t in the default list, you can add and build a connection with it using the custom services option.
Note: If you’re looking to connect Zoho Projects with another Zoho Product that also follows the OneAuth authentication mechanism, select the service Zoho OneAuth from the Default Services list to create the connection.

  • In our example, the application to connect with Zoho Projects is Dropbox, and because it’s in the Default Services list, go ahead and choose Dropbox.

  • After choosing the service, enter the connection name. A connection link name will be populated automatically.
  • Toggle Use credentials of login user to Yes if you want every user installing the extension to access the connection using their own login credentials, or No if admin credentials are enough to access the connection.
  • In our example, we'll proceed with the former. So toggle to Yes, and then click Create and connect.
Note: For services in which the option to choose the scopes is displayed, choose the necessary scopes, and then click Create and connect.

  • You’ll be directed through a series of authorization steps before being prompted to connect with Dropbox by entering your login information.
  • The connection will be established successfully once you sign in with Dropbox, and you will be redirected to the Connection Summary details page in Sigma.
  • To access this connection as part of an extension, you’ll need to configure the sample code provided under the JSON section in the plugin-manifest.json file. We’ll explore this in the next section.

2. Extension configuration

Now that we've successfully established our connection, let's look at how we can achieve our use case feature of displaying the Dropbox file request folder within the Zoho Projects task detail page. As mentioned earlier, to accomplish this, we’ll need to implement the following measures.
A. Create an extension

B. Configure the plugin-manifest.json file

C. Set up the widget code
Let's explore these steps in order.

A. Create an extension
B. Configure the plugin-manifest.json file
  • As previously stated, to access the connection established between Zoho Projects and Dropbox, the connection must first be configured in the plugin-manifest.json file.
  • Copy the JSON sample code from the Connection Summary Details page and paste it into the plugin-manifest.jsonfile as the value for the connections key.

  • You will also need to white list the Dropbox domain for Dropbox calls to be processed without being blocked.
  • Include the domain in the plugin-mainfest.json file as the value for the whiteLitsedDomains key.

  • As we saw in our earlier post, the plugin-manifest.json file includes a widget called Projects Extension by default. For our example, because we’re connecting with Dropbox and constructing a widget that will include Dropbox request folders to upload files, enter the widget name and location.

  • The final configured plugin-manifest.json file for our example would be as follows:
  1. {
  2. "connectors": [{
  3. "connectionLinkName": "dropbox",
  4. "userAccess": true,
  5. "sharedBy": "xxxxxxx",
  6. "connectionName": "dropbox",
  7. "serviceName": "dropbox",
  8. "isUserDefinedService": false
  9. }],
  10. "whiteListedDomains": ["https://api.dropboxapi.com"],
  11. "service": "PROJECTS",
  12. "cspDomains": {
  13. "connect-src": []
  14. },
  15. "storage": true,
  16. "locale": ["en"],
  17. "config": [],
  18. "modules": {
  19. "widgets": [{
  20. "name": "Dropbox - File Upload",
  21. "location": "taskdetails_rightpanel",
  22. "url": "/app/dropbox.html"
  23. }],
  24. "triggers": []
  25. }
  26. }

C. Setting up the widget code

Now, that we’ve created an extension and configured the plugin manifest file, let's finally set up the widget code in order to display all Dropbox file request folders inside our task details right panel.

Dropbox.html widget code: Please find the widget code snippet as an attachment in this post.
  • In this widget code, we’ve invoked the Dropbox API to list file request folders by constructing and passing the required data along with the connection we had established for Dropbox.
  • The API will be invoked and return all of the file request folders in the task details right panel, from which users can click on the link and directly upload files to Dropbox from within a task in Zoho Projects itself.
Sample output
  • Once the code is setup, publish and install the extension to check the functionality in the Zoho Projects portal.
  • Enter a task and click the extensions icon in the right panel.

  • From the lists of your Dropbox file requests, select the requests to which you wish to upload files.

  • The file will be successfully uploaded in the respective Dropbox file request.


We’ve demonstrated how to upload files directly to Dropbox file request folders from within Zoho Projects in this example. As part of your extension, you can use the Connections feature to do a variety of tasks, some of which are highlighted below.
  • View and update files associated with a certain request.
  • Create Dropbox folders and share them with collaborators.

Connections, therefore serves as a powerful tool that assists you in establishing a connection with other apps and performing smooth data transactions across your applications, thereby improving business functions and optimizing your work.

We hope this information was useful to you. Continue to follow us for further updates!

Sign up for a Zoho Developer account and start developing extensions for Zoho products using Sigma.

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





                                                              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

                                                                                                                • UK payroll entries

                                                                                                                  Hey guys, Nett payroll payments are imported direct into the bank, using an external payroll system (will be glad for Zoho to have a UK payroll app) At present I have monthly recurring bills for HMRC which are auto entered & paid when due. This seems
                                                                                                                • Zoho Commerce + MCP + Claude

                                                                                                                  Hi everyone, I wanted to share a really impressive experience I had with Zoho Commerce + MCP + Claude. I created an MCP server using Zoho MCP Server and connected my Claude instance to my store built with Zoho Commerce. For safety, I enabled only product
                                                                                                                • auto add as member the contact owner

                                                                                                                  is there a way that i can make a zoho flow that will add the owner of the contact as a member of the chat after the round robin assignment?
                                                                                                                • Get Files Associated to Data Template via API

                                                                                                                  I have a data template with multiple files associated to it, and trying to write a Deluge script that will fetch files associated with this data template. I created the script below based on the WorkDrive API documentation, one request uses the data templates
                                                                                                                • Zoho Book - Banking Module - Cash Credit account

                                                                                                                  I have a CC account with a bank. I initially added the account as a 'Bank Account' under the banking module in Zoho Books. However, this CC Bank Account is showing as an asset instead of a liability. I have added the account as a credit card account but
                                                                                                                • Adding a custom formula field from sub-forms

                                                                                                                  I have used my 5 Aggregated Sum fields in the subform. I have another column I want to add a summary of. This can be in a separate section/field. The formula field won't pull in information from the sub-form. How do I pull information from the sub-form
                                                                                                                • Remove Zoho Header from Portals

                                                                                                                  I have a portal page with custom domain. But when I print directly from a webpage, the Zoho CRM header shows. It kind of kills the branding aspect. Is there a way to get rid of this?
                                                                                                                • Creator List not showing

                                                                                                                  I've edited a list in creator, but when I open it in the live version the list is completely different. Anyone know why this is happening? Edit Version: Live Version:
                                                                                                                • Please design a better spam filter

                                                                                                                  Hi Team, While I love Zoho Mail for all the awesome features you have designed - this is the one you need to do a lot of work on - Spam Filter. Your spam categorization seems to be very inefficient - any email containing brand images or a tracking pixel
                                                                                                                • Host not reachable when sending

                                                                                                                  For few partner that I send regular emails now got error and they don't receive emails Temporary failure fam-xxx.hr/185.xx.xx.xxx Host not reachable. Have more than 20 mails in https://mailadmin.zoho.eu/cpanel/home.do#mailSettings/retryEmail please
                                                                                                                • IP flagged as abusive

                                                                                                                  I'm getting the error that 136.143.188.15 is listed as abusive. I've checked with mxtoolbox.com and it is indeed in the list
                                                                                                                • App passwords stop working

                                                                                                                  Some of my app passwords appear to stop working after awhile. Seems to happen every 6 months or so. Just had to change one again for the second time in a year. Is this a bug or a feature? Or perhaps changes are being made on the back end on occasion that
                                                                                                                • Duplicate entries for contacts birthdays

                                                                                                                  Good morning I have recently started to use my Zoho calendar and noticed that there are multiple birthday events showing for some of my contacts. I have checked my contacts and there were duplicates for some contacts which I have now rectified but the
                                                                                                                • Problem: New Email Consistently Failing to Sync/Display in Inbox

                                                                                                                  Recently, I have noticed that my Zoho Email inbox does not indicate I've received a new email, until I go to *another* folder and then return to the inbox. Only then will new emails be displayed. This has happened 100% of the time, during the past few
                                                                                                                • Zoho IMAP Access to mail doesn't sync messages

                                                                                                                  As stated in the topic - I have company account email address setup, and it has ( as in the picutre ) ActiveSync and Imap access enabled. However the messages does not show up while logged in in Zoho Mail however when I log in in thunderbird everything
                                                                                                                • Cliq iOS can't see shared screen

                                                                                                                  Hello, I had this morning a video call with a colleague. She is using Cliq Desktop MacOS and wanted to share her screen with me. I'm on iPad. I noticed, while she shared her screen, I could only see her video, but not the shared screen... Does Cliq iOS is able to display shared screen, or is it somewhere else to be found ? Regards
                                                                                                                • Temps working custom view in Zoho Recruit

                                                                                                                  How do you create a custom view of temps working for this week.  I have tried multiple combinations of job status, start date, end date etc but I am unable to find the correct combinations to show the temps I have working this week?? Any suggestions on how I can do this. 
                                                                                                                • Client Scripts similar to CRM?

                                                                                                                  Hi, Is there any plans for Client Scripts to become a feature of Recruit? Feel this will be a great benefit to a number of users. Would be great for example in cases where a Client has banned / blacklisted a Candidate - so that if that candidate is associated
                                                                                                                • Announcing Zoho Sheet desktop app for macOS and Windows (Beta)

                                                                                                                  Hello Sheet users, We know you’ve been waiting for this one. It has always been the top priority on our roadmap to provide a single native desktop app for macOS and Windows that works both online and offline. Today, we are excited to announce that the
                                                                                                                • Automated entries past the current month in a calendar report

                                                                                                                  Hi all, I have an automation problem. I have a form which on successfull entry adds either 5 or 10 more of these entries with a slight change so our customers can see it throug a calendar report on the webiste. The entry put in manually shows up perfectly
                                                                                                                • Billing Status Update

                                                                                                                  Hello Latha, I’m working on a new automation (deluge) to fulfill one of our requirements. In this automation, there is a step to update the Work Order billing status from “Not Yet Invoiced” to “Non-Billable.” I tried to find the API information relevant
                                                                                                                • What's New in Zoho POS - April 2026

                                                                                                                  Hello everyone, Welcome to Zoho POS’s monthly update, where we share our latest feature updates, enhancements, events, and more. Let’s take a look at how April went. Access and manage other web applications in Zoho POS with Web Tabs You can now access
                                                                                                                • Many Zoho POS Issues

                                                                                                                  Can not apply credits from a customers account as a form of payment. It shows that you can but there is a bug that does not execute the action. Reported many times. Can not view Sessions from Zoho POS WebView, throws a JQUERY error Workflows and actions
                                                                                                                • HOW I CAN GET BETA VERSION FOT TESTING

                                                                                                                  HI. ZOHO I AM INTERESTED IN YOUR BETA SOFTWARE TO EXPERIENCE NEW FEATURES.
                                                                                                                • Multiple EAN code for product

                                                                                                                  option to add multiple EAN code for product???
                                                                                                                • Issue adding/changing mobile number for OTP

                                                                                                                  Hi Zoho Community, I’m trying to add or change my mobile number, but I keep getting this error: “We’re unable to send OTP to this mobile number. Please contact support-as@eu.zohocorp.com” Because of this, I can’t verify my number or continue the setup.
                                                                                                                • Zoho Payroll Canada does not work

                                                                                                                  We submitted payroll within the required timelines. The money was withdrawn from our account and our employees have not been paid. Impossible to get a hold of someone at Zoho. I can’t believe the company operates like this. What a bloody disgrace. Shame
                                                                                                                • Enhance Appointment Buffers in Zoho Bookings

                                                                                                                  There was previously a long-standing feature request related to enhancing the way appointment buffers work in Zoho Bookings, but it looks like the original post has been deleted. I am therefore adding a new request that Zoho Bookings adjust how appointment
                                                                                                                • Functionality based URL to find records due today or in the next week

                                                                                                                  I need to construct a URL to filter a view to records where the evaluation is due soon (i.e. in the next 7 days). To me, that includes today, but Zoho has a different opinion. Zoho defines 39 as NEXT_7_DAYS but this gives unexpected results. https://creatorapp.zoho.eu/...#Report:My_Evaluations?Evaluation_due_by_op=39
                                                                                                                • Allow customers to choose meeting venue and meeting duration on booking page

                                                                                                                  My business primarily involves one-to-one meetings with my clients. Given the hybrid-work world we now find ourselves in, these meetings can take several forms (which I think of as the meeting "venue"): In-person Zoom Phone call I currently handle these
                                                                                                                • Event Time Zone in meeting invites are confusing users

                                                                                                                  When sending calendar invites to internal and external users, the first section "Event Time Zone" is confusing people and they are automatically declining events. Can this section please be removed??? It already shows the correct time zone next to the
                                                                                                                • Forwarding without verification

                                                                                                                  Hi, I use Tripit to keep track of all my business travel. I've recently moved over to Zoho and wanted to set up a forwarding rule to send various travel confirmation emails automatically to plans@tripit.com Obviously this is an email address I don't control,
                                                                                                                • Filter by user in Pivot Chart

                                                                                                                  I have a Pivot chart where the data should be filtered by user. The user enters the system and should see only the data that correspond to it. Can anyone help me?
                                                                                                                • All new Address Field in Zoho CRM: maintain structured and accurate address inputs

                                                                                                                  Availability Update: 29 September 2025: It's currently available for all new sign-ups and for existing Zoho CRM orgs which are in the Professional edition exclusively for IN DC users. 2 March 2026: Available to users in all DCs except US and EU DC. 24
                                                                                                                • Whatsapp Limitation Questions

                                                                                                                  Good day, I would like to find out about the functionality or possibility of all the below points within the Zoho/WhatsApp integration. Will WhatsApp buttons ever be possible in the future? Will WhatsApp Re-directs to different users be possible based
                                                                                                                • Internal mails on our company domain (managed by Zoho) do not get delivered

                                                                                                                  Hi last week Thursday and Friday a colleague had sent me two emails which did not show up at all in my inbox, spam or anywhere else. What this a problem with Zoho mail in general or did this affect just us? From the forum is reads like many problems had
                                                                                                                • #2 The Tax Talk Nobody Wants to Have

                                                                                                                  "We are also able to manage our GST invoices without worrying about compliance issues. With Zoho Invoice, we are happy, our tax consultant is happy, and so are our customers," rejoices Shivprateek Habib, Partner, Flutterboots Services LLP. That's usually
                                                                                                                • Bulk upload images and specifications to products

                                                                                                                  Hi, Many users have asked this over the years and I am also asking the same. Is there any way in which we can bulk upload product (variant) images and product specifications. The current way to upload/select image for every variant is too cumbersome.
                                                                                                                • Workflows fail silently in Zoho CRM and there is no native way to know

                                                                                                                  Workflow automation is honestly one of the biggest reasons my clients choose Zoho. But there is one problem I keep running into across almost every implementation. When a workflow fails, nobody finds out. Email alerts hit daily limits and just stop. Custom
                                                                                                                • Zoho Commerce and Third-party shipping (MachShip) API integration

                                                                                                                  We are implementing a third-party shipping (MachShip) API integration for our Zoho Commerce store and have made significant progress. However, we need guidance on a specific technical challenge. Current Challenge: We need to get the customer input to
                                                                                                                • Next Page