In our previous post, we noted the two ways to create extensions for Zoho Projects— using the cloud editor and using the command line interface (CLI). We also shared how to create an extension using the Sigma cloud editor. In this post, we'll take a closer look at creating an extension using the CLI.
You'll learn how to create an extension project template with the CLI, test it, upload the zipped project while creating an extension, and then edit or change it. Let's go over each of these steps in detail.
Building an extension project using the CLI
- To create an extension project, we must first set up the development environment, which involves:
➤ Downloading Node.js: Node.js acts as the base platform as well as the JavaScript environment in which the JavaScript code is executed.
➤ Installing ZET CLI: Zoho offers a command line interface called Zoho Extension Toolkit (ZET) which enables you to build, test, and pack your extension project.
- Once the development environment is ready, use the basic ZET commands to create, validate, pack, and test your extension project.
➤ zet init: Create a new project and add the necessary folder structure and resources
➤ zet validate: Validate the entire project
➤ zet pack: Pack the project to get a zipped file that will later be associated as the connected app
➤ zet run: Run the internal Zoho server to test the project locally
Now, let's use these commands to create and manage an extension project.
- First, use the zet init command. Select Zoho Projects as the Zoho service from the dropdown list.
- Enter a name for the extension. An extension with the directory structure required for a sample Zoho Projects extension is created automatically.
- This directory structure contains an app folder and a plugin-manifest.json file, both of which are similar to those created by the Sigma cloud editor detailed in the last post.
- The app folder can be used to manage all the important resources required for your extension. By default, itincludes an index.html file, which serves as the UI for a sample widget.
- The plugin-manifest.json file helps with extension configuration. It includes a widgets key configured with a default sample widget named, "Projects Extension" in the default location as the task details tab, along with the URL as the location of the index.html file.
Now that the extension project has been created, lets go ahead and test it in the Zoho Projects portal.
Testing an extension project using the CLI
- To test a sample Zoho Projects extension created with the ZET CLI, use the Change Directory command to navigate to the project folder. Then, run the zet run command.
- This command starts a local server and enables you to test your extension locally.
- Now, navigate to your Zoho Projects portal. Click the Setup icon.
- Select Developer Space from the left panel. Click Enable Developer Mode.
- Developer Mode will be enabled and the page will automatically refresh.
- You may now test your extension functionalities in the Zoho Projects portal.
- Since the sample extension had a default widget called, "Projects Extension" configured on the Task Details page, choose and enter a project task in your portal.
- Click on the Projects Extension tab on the Task Details page, and you will see that the widget has loaded.
- Once you have finished testing your extension's functionality, use the zet pack command. This command adds a dist folder to the directory structure, zips the extension project, and places the zipped file inside the newly created dist folder.
Uploading the zipped file to your Sigma extension
Now that we have created the extension project and tested its functionalities locally, lets go ahead and create an extension in Sigma.
- Once you enter your Sigma workspace, click the New Extension button to build a new extension.
- Enter a name and description for the extension. Choose Zoho Projects for the service.
- Toggle Upload Existing File to Yes.
- Click Browse to locate and upload the extension project's zipped file, accept the terms and conditions, and click Create.
- You will be redirected to the cloud editor. The directory structure of your CLI extension project will be automatically populated with the project's contents.
Editing an extension created with the CLI
- You can make edits or changes to your extension code directly from the cloud editor.
- If you wish to make changes to a file or its contents in the directory structure of your CLI extension project, please be sure to pack the extension project again using the zet pack CLI command.
- Go to Sigma. Click the Extension Details icon of the extension you wish to edit.
- Click the Edit icon under the extension name.
- Browse for and upload the new zipped file, accept the terms and conditions, and click Update.
- The extension will be updated to reflect the changes you have made.
In this post, we have covered the process of creating an extension for Zoho Projects through ZET CLI. We hope you found this information useful. Keep following this space for more information!

Sign up for a
Zoho Developer account and start developing extensions for Zoho products using Sigma.
SEE ALSO
Recent Topics
HEIC File Type Viewer
Hi, It would be nice to be able to click on the images in the All Entries/Reports Tables which are HEIC the same as JPG, PNG, etc. so they open in a viewer from Zoho or the Attachment Service, today HEIC requires you to download each image and open it
Building Toppings #4 - Setting up and using connections in Bigin toppings
When building a topping to extend Bigin's functionality and connect it with third-party applications, creating and handling connections is an important step. Connections provide a secure way for your topping to authenticate and communicate with other
Free Webinar: Zoho Sign for Zoho Projects: Automate tasks and approvals with e-signatures
Hi there! Handling multiple projects at once? Zoho Projects is your solution for automated and streamlined project management, and with the Zoho Sign extension, you can sign, send, and manage digital paperwork directly from your project workspace. Join
Need code format to specify default values
Can someone please direct me to the code syntax or the proper translation per the instructions circled below. These instructions don't seem correct.
AI Interview Insights: Turn Recorded Interviews into Quick Transcripts & Summaries
Evaluating interviews shouldn’t require replaying long recordings or taking manual notes. With AI Interview Insights, you can now review complete transcripts and AI-generated summaries of your One-way (Recorded) interviews right inside Zoho Recruit. This
OAuth integration issues
I'm experiencing persistent OAuth errors when trying to connect Make with Zoho API. I've tried multiple approaches but keep encountering the following issues: First error: 'Invalid Redirect Uri - Redirect URI passed does not match with the one configured'
Facing email delivery issues? Verify your domain's DNS records
Have you ever wondered why your legitimate emails are landing in the recipient’s spam folder? Or been surprised to see emails sent from your registered domain getting rejected by recipient email servers? Why does this happen? In most cases, this happens
Adding Markdown text using Zoho Desk API into the Knowledge Base
Hi Zoho Community members, We currently maintain the documentation of out company in its website. This documentation is written in markdown text format and we would like to add it in Zoho Knowledge Base. Do you know if there is REST API functionality
Order of Departments in Help Desk
In the end user portal, , the departments are sorted by the date of creation of the department (or perhaps their id). Is there a way to choose the display order of the departments or at least to be able to sort them alphabetically?
COGS - Account showing negetive
I have multiple COGS account and in these all there is one account is negetive so suggest why it is showing negetive value.?
Create CRM Deal from Books Quote and Auto Update Deal Stage
I want to set up an automation where, whenever a Quote is created in Zoho Books, a Deal is automatically created in Zoho CRM with the Quote amount, customer details, and some custom fields from Zoho Books. Additionally, when the Sales Order is converted
%PaymentLink%
Does not work. Software creates a BAD link. ....and yes payment options are turned on. Link on the invoice pdf once opened will work but this template is a joke.
Google Photos
I am hoping that my question already has a fix. I current have Google synced accounts that I want to get away from. One in particular on is Google photos. Is there any software, or 3rd parties that I can join to back my photos up straight to specifically designated file in the ZOHO cloud that's tied to Docs? Please advise... Mike
1stDibs Integration to Zoho Inventory
Hello is it possible to integrate my Zoho inventory and 1stDibs?
Zoho Books Items Categorisation/Grouping/Folder
Is there a way to do items categorisation? a folder structure? Product Type A - Option 1/2/3 Product Type B - Option 1/2/3 Current problem : I have more than 50 items on the list, its hard for team to navigate.
Cash payments before invoice date
We have been using zoho books for our hospitality business for some time and have been very happy with the system. However in 2025 an update was pushed through and we are now not able to record payments for invoices before the invoice date. the case scenario
Copy / Duplicate Workflow
I have workflows setup that are very similar to each other. We have a monitoring system watching servers, and all notifications - no matter what client it is about - will come from a noreply@ address which is not very helpful in having it auto assigned to the right account. I have setup a workflow that will change the contact name of the ticket (currently it would say noreply@) to the correct customer which is based on the subject line, as that mentions which server the alert it is about. I need
Transfer between two customers (Peters Rental account to Peters Private account)
we are a Property Management company. Our customers have to accounts (registered as two customers - Peter Rental and Peter Private On the rental account all income and costs fron rental activities are noted. On the private account all private are noted
Automation#18: Automatically Fetch Values from Contacts to the Tickets Module
Hello Everyone, Welcome to this week's edition, where you can seamlessly sync fields from the Contacts to the Tickets module. For efficient business operations, it's crucial to have details mapped across different modules. Zylker Secure offers antivirus
Charge multiple invoices
We use auto-charge/recurring invoicing for 100's of clients. If we create a single manual invoice we can charge it to the credit card for these clients with the CC added to their recurring invoices. If a client has multiple outstanding invoices, is there a way to make one charge for all of the invoices instead of a separate charge to the cc for each invoice?
Handling/tracking escalation management in Zoho
Hi all, I am working on finding a tool to register and track our escalation management process. Specifically, this is about client escalations, typically related to project delivery issues. The idea is that we could have some sort of form with core questions
Global Choice List share ownership
I have created several forms that use one or more Global Choice Lists. These lists have been published to Org. I would like to allow one or more admins to edit the choices in these lists. Any help appreciated. Geoff
Setting up property management in Zoho Books
Hi, I run a property management business that manages property complexes. There are multiple owners, some owning more than one property on the same complex. My role is to manage the fees they pay for maintenance of common areas, such as the swimming pool
How to prevent users from switching price lists in an order?
Hi, I have Zoho Finance integrated with Zoho CRM. My team will be placing orders through the CRM using the Finance module. When creating a new customer I will assign it a price list, I don't want the sales rep to switch to a different Price List, other
Zoho Learn and Zoho CRM integration
I would like to see an integration between Zoho Learn and Zoho CRM. 1. To be able to add articles in a related list in all modules 2. Zia to suggest related articles in a Deal or Case or Lead 3. Ability to read / search articles during a call / follow
Mollie Connect in Zoho Books
Have noticed that Zoho Books is missing the most popular payment provider in Europe: Mollie. Knowing that Mollie has a solid Java SDK, why is this not yet implemented in Zoho Books for European customers? More info: https://docs.mollie.com/oauth/ov
Unable to change Lookup field from Multi Select to Single Select
I am trying to change a Lookup field in my Zoho Creator form from Multi Select to Single Select, but I am unable to find any option to do this.
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
Simple Callback Notifications Needed
My team are terrible at remembering their CRM callbacks, often due to how long in the future they are set for. Is there a way i can set an e-mail notification for when a callback is due? For example we set it for 9am one day and five minutes before they
Personal Data (RODO), Cookies / Trackers - ePrivacy
I have noticed several issues that should be addressed on the customer support page. Zoho Desk provides the support portal, but it currently lacks the following options: A GDPR and personal data processing consent checkbox before logging in, located in
email association with CRM
Why is it 2024 (almost 2025) and Zoho has not figured out how to integrate email with CRM? It is so inconsistent at associating emails within CRM. I am an attorney. I have clients and work with other attorneys. Attorney John Doe is associated with multiple
How to set a multi-lookup field as mandatory?
Allow Multiple Scheduled Appointments with Zoho Support
Dear Zoho Team, I hope you're doing well. First, thank you for introducing the option to schedule support calls via the Zoho CRM booking link. This has been a fantastic enhancement, eliminating the need for back-and-forth coordination when scheduling
Audit Log for Zoho One Admin Panel
Dear Zoho One Team, We would like to request the addition of an Audit Log feature in the Zoho One Admin Panel. This log should provide visibility into any changes made within the Zoho One admin panel and directory, including but not limited to: Adding,
Can I re-send the Customer Satisfaction Survey after a ticket closure?
Hello, Some customers does not answer the survey right after closure, is it possible to re-send after a few days or weeks? Best Regards!
Personalize your booking pages with Custom CSS
Greetings from the Zoho Bookings team! We’re introducing Custom CSS for Zoho Bookings, designed to give you complete control over the look and feel of your booking pages. With this new feature, you can upload your own CSS file to customize colors, fonts,
Bug: OAuth 2.0 State Parameter fails with Pipe Delimiters (RFC 6749 Non-Compliance)
I've discovered a bug in how Zoho's API Console handles the OAuth 2.0 authorization flow when the state parameter contains pipe characters (|), and I'm hoping the Zoho team can address this in a future update. The Issue Zoho's OAuth 2.0 implementation
Custom Function to increment a value by one
Hi, I'm trying to find a solution to set up a counter on CRM records that tracks how many times certain actions have taken place. As a specific example: We have a field on Deals called "Times Close Updated". This starts at 0 on record creation. I'd like
Zoho Books Extension: What Happens If Custom Fields Already Exist?
When developing Zoho Books extensions, what happens if the target Zoho Books organization already has a custom field with the same API name as one defined in the extension? I’m asking because we originally created an on-Books version of this functionality,
Access token generate from the refresh token not working for API
Dear Sir/Madam, When I use my refresh token to obtain new access_token, that token return INVALID_TOKEN when the same API is called. I made sure that my api site is correct and match the auth web site. However the original access_token work fine.
Next Page