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

    • Recent Topics

    • Billing Management: #6 Usage Billing in SaaS

      Imagine a customer shuffling across multiple subscriptions, a streaming service, a music app, cloud storage, and a design tool. Each one charges a flat monthly fee, regardless of how much or how little they use. Some months, the customer barely opens

    • Is there anyone who has been experiencing issues regarding the Zoho Creator Certification Website in the past 2 weeks?

      Dear all , I just wanted to ask is there anyone who was planning on taking the Zoho Creator Developer Certification Test in the past 2 weeks and have been facing errors stating that the website is under maintennance and also not allowed to access the

    • Directly Edit, Filter, and Sort Subforms on the Details Page

      Hello everyone, As you know, subforms allow you to associate multiple line items with a single record, greatly enhancing your data organization. For example, a sales order subform neatly lists all products, their quantities, amounts, and other relevant

    • Allow syncing Activities from other applications

      Marketing Automation could be a much more powerful platform if you were able to sync activities into the platform (e.g. purchase, donation, etc) outside of a user doing something on your website. I'd love it if you could sync Custom CRM Modules as activities,

    • 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

    • Global Sets for Multi-Select pick lists

      When is this feature coming to Zoho CRM? It would be very useful now we have got used to having it for the normal pick lists.

    • Introducing Profile Summary: Faster Candidate Insights with Zia

      We’re excited to launch Profile Summary, a powerful new feature in Zoho Recruit that transforms how you review candidate profiles. What used to take minutes of resume scanning can now be assessed in seconds—thanks to Zia. A Quick Example Say you’re hiring

    • Integración Books para cumplir la ley Crea y Crece y Ley Antifraude (VeriFactu)

      Hola: En principio, en julio de 2025, entra en vigor la ley Crea y Crece y Ley Antifraude (VeriFactu). ¿Sabéis si Zoho va a cumplir con la ley para cumplir con la facturación electrónica conectada a Hacienda? Gracias

    • Ask the Experts #1

      Hello everyone! It’s time to transform how you manage projects. Define the processes. Automate the tasks. Streamline the workflows. Let us dive into automation in Zoho Projects — from configuring workflows and custom functions to building triggers, using

    • How to overcome Zoho Deluge's time limit?

      I have built a function according to the following scheme: pages = {1,2,3,4,5,6,7,8,9,10}; for each page in pages { entriesPerPage = zoho.crm.getRecords("Accounts",page,200); for each entry in entriesPerPage { … } } Unfortunately, we have too many entries

    • Checking if Creator has Change History

      Like zForms - whenever an entry was updated there's an option to attached change history to email notif. Trigger -> Successful form submission

    • how to use validation rules in subform

      Is it possible to use validation rules for subforms? I tried the following code: entityMap = crmAPIRequest.toMap().get("record"); sum = 0; direct_billing = entityMap.get("direct_billing_details"); response = Map(); for each i in direct_billing { if(i.get("type")

    • Adding contact role to a specific deal js sdk malfunctioning

      i was trying to add the contact role to a specific deal contact but repeatedly i am getting this error: { "code": "SUCCESS", "details": { "statusMessage": { "code": "INVALID_DATA", "details": { "expected_data_type": "jsonobject" }, "message": "body",

    • Q3 Updates from Bigin!

      Hey Biginners, Hope you’re doing great! As we approach the end of 2025, we truly hope Bigin has been a part of helping you build your dream business this year! We've been busy working behind the scenes to bring you features that make running your business

    • New Series Announcement - Ecommerce Marketing Tips

      Running an online business is more than just having a website. It’s about getting the right customers to discover you, trust you, and keep coming back. To support your growth journey, we’re launching a weekly Marketing Tips series right here on Zoho Commerce

    • Client Script | Update - Introducing Subform Events and Actions

      Are you making the most of your subforms in Zoho CRM? Do you wish you could automate subform interactions and enhance user experience effortlessly? What if you had Client APIs and events specifically designed for subforms? We are thrilled to introduce

    • {"errors":[{"id":"500","title":"Servlet execution threw an exception"}]}

      Here's the call to move a file to trash. The resource_id is accurate and the file is present. header = Map(); header.put("Accept","application/vnd.api+json"); data = Map(); data_param1 = Map(); att_param1 = Map(); att_param1.put("status",51); data_param1.put("attributes",att_param1);

    • Converting Sales Order to Invoice via API; Problem with decimal places tax

      We are having problems converting a Sales Order to an Invoice via API Call. The cause of the issue is, that the Tax value in a Sales Order is sometimes calculated with up to 16 decimal places (e.g. 0.8730000000000001). The max decimal places allowed in

    • Zoho Canvas - Custom templates for related lists

      Hi, I see that the example pages load always one of our related lists in a custom template, but I dont know how to work with that:  1) How can i make my own custom templates for related lists?  2) Where and how can i check out existing custom templates?

    • Kaizen #147 - Frequently Asked Questions on Zoho CRM Widgets

      Heya! It's Kaizen time again, folks! This week, we aim to address common queries about Zoho CRM Widgets through frequently asked questions from our developer forum. Take a quick glance at these FAQs and learn from your peers' inquiries. 1. Where can I

    • open word file in zoho writer desktop version

      "How can I open a Microsoft Word (.doc or .docx) file in Zoho Writer if I only have the file saved on my computer and Zoho Writer doesn't appear as an option when I try 'Open with'? Is there a way to directly open the .doc file in Zoho Writer?"

    • Zoho PDF editor has a lot of issues.

      Zoho PDF editor needs a lot of work. It hangs and glitches a lot. Deletes annotations and clearings randomly.

    • Zohom mail

      Plz resolve the problem . I hope u understand .

    • Zoho sheet desktop version

      Hi Zoho team Where can I access desktop version of zoho sheets? It is important as web version is slow and requires one to be online all the time to do even basic work. If it is available, please guide me to the same.

    • ZOHO SHEETS

      Where can I access desktop version of zoho sheets? It is important to do basic work If it is available, please guide me to the same

    • Zoho Books - France

      L’équipe de Zoho France reçoit régulièrement des questions sur la conformité de ses applications de finances (Zoho Books/ Zoho Invoice) pour le marché français. Voici quelques points pour clarifier la question : Zoho Books est un logiciel de comptabilité

    • Using Zoho Flow to create sales orders from won deal in Zoho CRM

      Hi there, We are using Zoho Flow to create sales orders automatically when a deal is won in Zoho CRM. However, the sales order requires "Product Details" to be passed in "jsonobject", and is resulting in this error: Zoho CRM says "Invalid input for invalid

    • Is Zoho Sheet available for Linux ?

      Is Zoho Sheet available for Linux ?

    • Zoho pdf suit

      Pl. design products with following feature: 1. Please add all features given in Ilovepdf website to work on pdf files. It is mandatory to use pdf in court work. 2. Courts have prescribed New Times Roman, pl. add this font as well 3. Indexing, signature

    • Bharat

      a

    • how to disable staff selection Zoho Booking integrated to SalesIQ?

      currently there is only one Consultant in my Zoho Bookings like this I integrate Zoho Bookings into Zoho SalesIQ to create a chatbot. Unfortunately, even though I only have one consultant for a consultation, the user have to pick the consultant. It will

    • Zoho Bookings No Sync with Outlook

      Zoho Bookings appointments are showing on my Outlook Calendar but Outlook events are not showing on Zoho Bookings. How do I fix this?

    • End Date in Zoho Bookings

      When I give my appointments a 30 minutes time I would expect the software not to even show the End Time.  But it actually makes the user pick an End Time.  Did I just miss a setting?  

    • Custom confirmation message

      How can I change the message that users see after they submit the booking form? I have to confirm some details before their appointment is officially "confirmed", so I want to change it where it doesn't say their appointment is "confirmed" but rather

    • Issue showing too many consultations in my workspace link.

      Hi Team, I’ve set up two Workspaces to track meetings from different sources. So far, this has been working well, and the two Workspaces are differentiated without any issues. However, when I navigate to Consultations and share the link to my personal

    • Deluge sendmail in Zoho Desk schedule can't send email from a verified email address

      I am trying to add a scheduled action with ZDesk using a Deluge function that sends a weekly email to specific ticket client contacts I've already verified the email address for use in ZDesk, but sendmail won't allow it in its "from:" clause. I've attached

    • Zoho Learn & Zoho Connect

      Hi, Is there a way to sync the knowledge base we have in Zoho Learn with the manuals section is Zoho Connect? Thanks,

    • Addin Support in Zoho Sheet

      Is there any addin support available in zoho sheet as like google marketplace to enhance productivity by connecting with other apps, providing AI data analysis, streamlining business processes, and more?

    • Changing Corporate Structure - How Best to Adapt Current and Future Zoho Instances

      My current company is Company A LLC with a dba ("doing business as" - essentially an alias) Product Name B. Basically, Company A is the legal entity and Product Name B is what customers see, but it's all one business right now. We currently have a Zoho

    • how to add subform over sigma in the CRM

      my new module don't have any subform available any way to add this from sigma or from the crm

    • Next Page