Building extensions #5: Creating custom connections for extensions

Building extensions #5: Creating custom connections for extensions

In our previous post, we discussed the significance of connections, identified their types, developed a predefined connection, and demonstrated how it can be integrated with Zoho Books using an example. In this post, we'll walk through the process of creating a custom connection using an example.

Custom connections facilitate the integration of applications with Zoho Books by aiding in configuring the required application's connection manually by providing application-specific details. Let's go over the steps involved in configuring custom connections in detail using a use case scenario.

Use case

Let's say an organization uses Zoho Books to manage its financial operations. To improve sales for the organization, one must contact and communicate with multiple clients, as well as check in with vendors on a regular basis to remain up to date on new products on the market, take demos, and assess whether the products need to be brought into the organization.

In these cases, it is best to schedule appointments with clients and vendors in order to conduct business in an organized manner. This can be easily performed by integrating an appointment scheduling software so appointments can be scheduled with a click.

For our demo purpose, let's consider Zoho Bookings as the appointment scheduling software. Since it is not available under the default list of services in predefined connections, let's create a custom connection to achieve this.

Steps to create a custom connection
  • Go to Sigma and access your workspace.
  • Enter the developer portal of the Zoho Books extension you're creating a connection for.
  • Navigate to the Build section and click Connections.
   
  • Click New Connection to create a new connection.
NotesNote: Alternatively, you can use the View All option under a connection type to see all the services under that particular connection type and begin creating connections.
     
  • Choose Custom Services and click Create Service.
   
  • Provide the details of the service.
➤ Enter a name for the service, and the service link name will be immediately filled in.
➤ Choose the authentication type that corresponds to the authentication mechanism supported by the service for which you are building the connection. These details will be available as part of the service's API documentation. For our example, we'll use OAuth2, because Zoho Bookings supports it as an authentication mechanism.         
  
➤ The remaining fields to be configured for the service differ based on the authentication type used. In our case, the parameter type is Header, and the grant type is Authorization Code.
   
➤ Please refer to the table below for the values that need to be configured in the remaining fields.
Note: Register the service in the Zoho Developer API console to get the client credentials.
  • Finally, click the Create Service button.
  
  • The service is created successfully. Click Create Connection to create a connection for this service.
  • Provide the connection details, select the scope, and click Create and Connect.
 
  • Proceed with the flow to accept the scopes and authorize the connection.
 

The connection is now authorized, and you'll be directed to the connection details page. This page will also contain sample code in both Deluge and JSON formats that can be used to utilize this connection as part of your extension components. Depending on which component you want to invoke the connection in, you can use the appropriate sample code format.

Additionally, a predefined connection for Zoho Books is created to perform operations on Zoho Books data to implement our use case. Get more information on predefined connections in our previous post.

Now, in accordance with our use case, let's create a custom button that includes this connection to schedule appointments (in Zoho Bookings) with clients and vendors using Zoho Bookings with a single click (from Zoho Books).
We require two custom fields for our logic, one for setting the meeting start time with the client or vendor, and the other to display the Bookings appointment calendar link once the meeting is scheduled.
  • Create custom fields for the Customers and Vendors module by selecting Preferences > Customers and Vendors > Field Customization > New Custom Field.
 
  • Next, create a custom button and include the logic to schedule an appointment.
  • Create a custom button for the Customers and Vendors module by selecting Preferences > Customers and Vendors > Custom Buttons > New.
InfoBook meeting custom button function Deluge code - Please find code snippet as an attachment in the post
  • In the above code, the Get Contacts API of Zoho Books is invoked through the InvokeURL method using the predefined connection to get the contact/customer details for whom the appointment has to be scheduled in Zoho Bookings. Refer to this post to get complete details on the parameters required to call the InvokeURL method.
  • From the API response, the required details are fetched from which the start time (custom field data) is formatted to the way required by the Zoho Bookings API.
  • Next, the Zoho Bookings API to get the service ID and staff ID are invoked consecutively through the InvokeURL method using the custom connection created.
  • The Book appointment API is used to schedule the appointment using the service ID, the staff ID obtained from the Zoho Bookings API, and customer details obtained previously via the Zoho Books API.
  • Finally, using the update contact Zoho Books API, the Zoho Bookings calendar URL is updated in the custom field created to display the calendar booking URL.
We've now completed the extension setup for our use case.

After testing and publishing the extension, as per our use case, you can book a meeting for a Zoho Books customer through Zoho Bookings and have your Zoho Bookings calendar reflected inside Zoho Books as well.

z
This is an example demonstration of the benefits of using a custom connection in a Zoho Books extension. This is a versatile use case that may even be used to schedule an internal meeting with your Zoho Books teammates who are working on a project. Similarly, this use case can be enhanced and implemented based on your needs.

We hope you found this information useful. Keep following us for more tips.

SEE ALSO

    Nederlandse Hulpbronnen


      • Recent Topics

      • Custom Fonts in Zoho CRM Template Builder

        Hi, I am currently creating a new template for our quotes using the Zoho CRM template builder. However, I noticed that there is no option to add custom fonts to the template builder. It would greatly enhance the flexibility and branding capabilities if

      • Unknown table or alias 'A1'

        I would like to create a subquery but i am getting the following error: Unknown table or alias 'A1' used in select query. This is the sql statement:  SELECT A1.active_paying_customers, A1.active_trial_customers, A1.new_paying_signup, date(A1.date_active_customers), 

      • All new Address Field in Zoho CRM: maintain structured and accurate address inputs

        The address field will be available exclusively for IN DC users. We'll keep you updated on the DC-specific rollout soon. It's currently available for all new sign-ups and for existing Zoho CRM orgs which are in the Professional edition. Latest update

      • Create PO from an invoice

        We are a hardware and software sales company which receives orders over the internet. We drop ship most of our products from a warehouse outside of our company. Our orders get sync'd into Zoho from our store via onesaas as invoices. It would be great

      • Collaboration with customers made easy with Zoom Meeting and Zoho Desk integration

        Hello everyone! We are happy to announce that you can now integrate your Zoho Desk account with Zoom Meeting. The integration bridges the gap between digital communication and human connection, empowering teams to deliver timely support when it matters

      • CRM Canvas - Upload Attachments

        I am in the process of changing my screens to Canvas.  On one screen, I have tabs with related lists, one of which is attachments.  There doesn't appear to be a way to upload documents though.  Am I missing something really obvious?  Does anyone have

      • TrueSync regularly filling up my local disk

        Seems that WorkDrive's TrueSync randomly starts filling up my local hard drive space. None of the folders have been set as "Make Offline" but still it seems to randomly start making file offline. The settings of the app is so minimal and is of no real

      • Kaizen #194 : Trigger Client Script via Custom buttons

        Hello everyone! Welcome back to another interesting and useful Kaizen post. We know that Client Scripts can be triggered with Canvas buttons and we discussed this with a use case in Kaizen#180. Today, let us discuss how to trigger Client Script when a

      • [Webinar] A recap of Zoho Writer in 2025

        Hi Zoho Writer users, We're excited to announce Zoho Writer's webinar for January 2026: A recap of Zoho Writer in 2025. This webinar will provide a recap of the features and enhancements we added in 2025 to enhance your productivity. Choose your preferred

      • Picklist field shows "none" as default

        Hello, Is there an option to avoid showing "none" as the default value in a picklist field? I also don't want to see any option displayed. My expectation is to have a blank bar, and then when I display the drop-down list, I can choose whichever I wa

      • Stage-probability mapping feature in custom module

        Hi, I'm building a custom module for manage projects. I would like to implement the stage-probability feature that Potentials has. Is this possible?

      • Create static subforms in Zoho CRM: streamline data entry with pre-defined values

        Last modified on (9 July, 2025): This feature was available in early access and is currently being rolled out to customers in phases. Currently available for users in the the AU, CA, and SA DCs. It will be enabled for the remaining DCs in the next couple

      • Field Description is very small

        Hello, The field Description in the activity is very small. Why don't try open a new window, or a bigger popup, or increase the width of the "popup". Example:

      • Introducing workflow automation for the Products module

        Greetings, I hope all of you are doing well. We're happy to announce a few recent enhancements we've made to Bigin's Products module. The Products module in Bigin now supports Workflows, enabling you to automate routine actions. Along with this update,

      • StatusIQ

        Please add StatusIQ to data sources. We using site24x7 and StatusIQ together and site24x7 integration is already there. Thanks and regards, Torsten

      • In Zoho People, the Operations buttons are frequently not visible or do not appear consistently.

        In Zoho People, the Operations buttons are frequently not visible or do not appear consistently. We request you to please investigate and address this issue, as it is affecting daily HR operations and user access.

      • Marketing Tip #14: Increase cart value with product bundles

        Bundling products is a great way to increase average order value while giving customers more convenience. Think “camera + tripod + memory card” or “soap + lotion + bath salts.” Bundles make shopping easier and feel like a better deal. It’s a win-win for

      • Problem with Workdrive folders

        I'm having a problem a problem accessing files in a Zoho work drive folder when using the Zoho writer app. The problem folder appears grayed out in the Zoho work drive window in both the online and writer application. However I can open the folder in

      • Zoho Tables is now live in Australia & New Zealand!

        Hey everyone! We’ve got some great news to share — Zoho Tables is now officially available in the Australian Data Center serving users across Australia and New Zealand regions! Yes, it took us a bit longer to get here, but this version of Zoho Tables

      • Sortie de Zoho TABLE ??

        Bonjour, Depuis bientôt 2 ans l'application zoho table est sortie en dehors de l'UE ? Depuis un an elle est annoncée en Europe Mais en vrai, c'est pour quand exactement ??

      • Add RTL and Hebrew Support for Candidate Portal (and Other Zoho Recruit Portals)

        Dear Zoho Recruit Team, I hope you're doing well. We would like to request the ability to set the Candidate Portal to be Right-to-Left (RTL) and in Hebrew, similar to the existing functionality for the Career Site. Currently, when we set the Career Site

      • Printing to a brother label maker

        I see allot of really old unanswered posts asking how to print to a label maker from a zoho creator app. Has their been any progress on providing the capability to create a customized height & width page or print template or whatever to print labels?

      • Auto tracking URL generation based on Carrier

        Hi, While creating a shipment order for a package in Zoho Books, I have a requirement that for example, if the carrier is Delhivery and tracking number is 1234, then can automatically the tracking link/URL be generated as www.delhivery.com/1234. Similary,

      • Helper Functions and DRY principle

        Hello everyone, I believe Deluge should be able to use 'Helper functions' inside the main function. I know I can create different standalones, but this is not helpful and confusing. I don't want 10000 different standalones, and I dont want to have to

      • Zoho CRM Portal Field Level Permission Issue

        Hi Support Team, I am using the Zoho CRM Portal and configuring field-level editing permissions. However, we are unable to restrict portal users from editing certain fields. We have created a portal and provided View and Edit (Shared Only) access for

      • Holidays - Cannot Enter Two Holidays on Same Day

        I have a fairly common setup, where part-time employees receive 1/2 day's pay on a holiday and full-time employees receive a full day's pay. Historically, I've been able to accommodate this by entering two separate holidays, one that covers full-time

      • Pre-orders at Zoho Commerce

        We plan to have regular producs that are avaliable for purchase now and we plan to have products that will be avaliable in 2-4 weeks. How we can take the pre-orders for these products? We need to take the money for the product now, but the delivery will

      • Introducing the Zoho Projects Learning Space

        Every product has its learning curve, and sometimes having a guided path makes the learning experience smoother. With that goal, we introduce a dedicated learning space for Zoho Projects, a platform where you can explore lessons, learn at your own pace,

      • Customer ticket creation via Microsoft Teams

        Hi all, I'm looking to see if someone could point me in the right direction. I'd love to make it so my customers/ end users can make tickets, see responses and respond within microsoft teams. As Admin and an Agent i've installed the zoho assist app within

      • Zoho Books' 2025 Wrapped

        Before we turn the page to a new year, it’s time to revisit the updates that made financial management simpler and more intuitive. This annual roundup brings together the most impactful features and enhancements we delivered in 2025, offering a clear

      • Add specific field value to URL

        Hi Everyone. I have the following code which is set to run from a subform when the user selects a value from a lookup field "Plant_Key" the URL opens a report but i want the report to be filtered on the matching field/value. so in the report there is

      • Can multiple agents be assigned to one ticket on purpose?

        Is it possible to assign one ticket to two or more agents at a time? I would like the option to have multiple people working on one ticket so that the same ticket is viewable for those agents on their list of pending tickets. Is something like this currently

      • Restrict Users access to login into CRM?

        I’m wanting my employees to be able to utilize the Zoho CRM Lookup field within Zoho Forms. For them to use lookup field in Zoho Forms it is my understanding that they need to be licensed for Forms and the CRM. However, I don’t want them to be able to

      • Zoho removed ability to see all Scheduled Reports!

        If you are not the owner of a scheduled report, Zoho recently removed the capability to see each scheduled report. As an admin who relies on seeing all scheduled reports being sent, this is a terrible update. Now I cannot see ANY scheduled reports...even the ones I am being sent!!  This should be a setting for admins to control.  This is a bad update.

      • Admins cannot see each others' Scheduled Reports?!

        Very frustrating that as an admin I cannot see what my reports my fellow admins have created and scheduled.  After asking about this on the help chat, I was told the issue is trust and security.  By giving someone Admin status, it means we trust them with those responsibilities. Please change this, it is not a good process to have to bother other users to change a report or change users within a report.

      • Add multiple users to a task

        When I´m assigning a task it is almost always related to more than one person. Practical situation: When a client request some improvement the related department opens the task with the situation and people related to it as the client itself, the salesman

      • This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details

        Hi Team, when I,m trying to create a email account (imagixmidia.com.br) it's showing this error >>  This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details plz help me  thanks

      • Edit default "We are here to help you" text in chat SalesIQ widget

        Does anyone know how this text can be edited? I can't find it anywhere in settings. Thanks!

      • Feature Request: Sync Leave Tracker to Zoho Mail / Calendar or provide option to download information

        Zoho Leave Tracker offers the option to sync the leave Calendar to Microsoft 365 and Google Calendar. Adding an option to sync to Zoho-Mail Calendar would avoid duplication and add significant value for users. An alternative would be to allow users to

      • Compensation | Salary Packages - Hourly Wage Needed

        The US Bureau of Labor Statistics says 55.7% of all workers in the US are paid by the hour. I don't know how that compares to the rest of the world, but I would think that this alone would justify the need for having an hourly-based salary package option.

      • Next Page