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

      • Brand Studio Projects in Analytics

        Hi All, Currently pulling my hair out over trying to link together some social media posts for a reporting dashboard in Analytics, so I thought I'd see if anyone on here had a solution. Our Marketing Team created a LinkedIn campaign in Zoho Brand Studio,

      • Manage Testing Process in Zoho Sprints

        Agile framework supports a robust quality assurance system that incorporates continuous testing throughout the development lifecycle of the product. The agile testing team focuses on planning the testing around the development, identifying defects early

      • Announcing the Zohotshots of the ZDC Hackathon 2025

        Hey everyone, The wait is finally over! After weeks of building, experimenting, and pushing creative boundaries, we’re excited to announce the winners of the second edition of the ZDC Hackathon. This edition brought together an incredible community of

      • ZOHO CRM Button Integration

        Hi Team, I’m currently working with Zoho CRM along with a custom application where I fetch deal details from the CRM and use them based on my requirements for each deal. Now, I want to enhance this setup. I plan to create a button on the Deal Detail page

      • Major journey crash and not loading. Zoho Marketing Automation

        Hi all. Last night (19MAR, 2026) Marketing Automation for a specific journey completely crashed, and since the crash the specific journey has failed to load at all (blank journey canvas, no journey appears, no menu accessible) but other separate journey's

      • Subtotals per Header

        Hey, we would like to display subtotals per header in our invoices:

      • Candidate Assessments, no workflows.

        I have an issue where I would like to trigger a workflow based on a candidate assessment being completed. Sometimes a returning candidate will complete a second assessment, on completion the status of the candidate will be updated to "Unqualified" if

      • Mail Merge in Zoho Desk

        Hello Team, Do we have an option of mail merge within Zoho Desk like we have in Zoho CRM? We have a requirement to generate some pdf file in the form of mail merge doc from the ticket.

      • Workdrive backup and default storage selection

        Hi community, I have been informed by Zoho that workdrive will be the default storage mechanism for crm and projects. These 2 Apps seem to have different design on how they interact with workdrive for storage. 1. Crm: seems to have files saves at the

      • Zoho vault filling in a form it's not supposed to fill in

        Hey there, I have a problem with ZOHO Vault autofill. In a software package, we have these options: For some reason zoho vault always replaces what's in the top option and fills a 2fa password in there, and then saves that value.. Meaning whatever was

      • Zoho Booking Integration with Desk

        Just wanting to share something in case it helps someone else who may run into a similar use case as we did. Issue: Currently, the Zoho Booking integration with desk will drop a comment into the ticket when a customer books a time, however it won't change

      • 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

      • Syncing calendar with Google Calendar doesn't work when events are sent to auto repeat

        Hi... The ZOHO CRM -- GOOGLE CALENDAR sync is broken. If I create a single event on either side, sync works, but if I create an event with auto repeat on either side it doesn't work. Furthermore, events created before the sync don't show up in the calendar.

      • Organization wide Account and Contacts Visibility/Sharing Capabilities?

        Has anyone figured out a way to make visibility or sharing of Accounts and Contacts to be available across the entire organization without having to have every individual user edit their Sharing permissions? For our sales folks they need to be able to

      • Notification of Interaction Assignment

        If a user is assigned an interaction, they should be notified via email. These are almost useless because if I assign an interaction for someone to respond to, they dont know that I assigned it to them without me telling them or them logging in and discovering

      • Countries List Global Set- Complete with Phone Country Code and Continent.

        Dear Zoho Team I saw your recent addition to the Global Sets regarding the Countries list and states. While working on it, why didn't you also add things like Continent and Phone Country Code? Also, some ISO codes from some Countries/regions are mis

      • Custom Display Field for Lookup Dropdowns in Zoho CRM

        Could Zoho CRM support changing the display field in lookup dropdowns, like Zoho Creator does? This would make it much easier to select the right record by showing a more useful field instead of only the default one. It would improve speed, clarity, and

      • Message as bot

        I would like to be able to send a Cliq message truly as a bot. the current implementation of this function, while it sends the message as a bot it sends that message inside a chat from the user how authenticated the flow cliq connection instead of directly

      • A2P 10DLC Opt-in Rejection Issue with Zoho Creator Public Form

        Hi everyone, I’m working on an A2P 10DLC SMS campaign and running into repeated rejections due to opt-in issues. I’m using Zoho Creator for the registration flow. The form is public (no login required). Users enter their phone number and there is an unchecked

      • Trouble with using Apostrophe in Name of Customers and Vendors

        We have had an ongoing issue with how the system recognizes an apostrophe in the name of customers and vendors. The search will not return any results for a name that includes the mark; ie one of our vendors names is "L'Heritage" and when entering the

      • Books <-> CRM synchronisation with custom Fields

        Hello, We are synchronising Books Customers with CRM Accounts. In CRM Accounts I set up last year a "segments" multiselect field shown below In Books, I set up a custom multi-select field with the same value as in the CRM And set up the synchronisation inside Books. Want to synchronise the Books Segments with the CRM Segments, but the later doesn't exist, and another non-existing is there ?! First, I don't understand where the field Segmentation is coming from. Second, I set CRM Segmentation to sync

      • Recording overpayment?

        So a customer just overpaid me and how do I record this? I can't enter an amount that is higher than the invoice amount. Eg. Invoice is $195 and he sent $200. He's a reccuring customer so is there a way to record so that he has a $5 advance for future invoice?

      • Introducing the New Zoho Assist Quick Support Plugin

        We are thrilled to announce the new Zoho Assist Quick Support Plugin, the upgraded and enhanced version of the Zoho Assist Customer Plugin. This new plugin allows organizations and IT administrators to deploy it directly onto their customers’ devices,

      • Automate your signing workflows with Zoho Sign + n8n

        Hello! We're excited to announce that Zoho Sign is now available as a community node on n8n, a popular open-source workflow automation platform used by tens of thousands of teams worldwide. n8n lets you connect apps, APIs, and services through a visual

      • Retainer invoice in Zoho Finance modlue

        Hello, Is there a way of creating retainer invoices in the Zoho Finance module? If not can I request this is considered for future updates please.

      • Spotlight #27: Embed visual collaboration Spaces in your presentations using the Vani add-on

        Hello everyone! This month’s spotlight feature is the Vani add-on for Zoho Show. Every time you pause your presentation to open another tab or pull up supporting material, you lose a bit of momentum. At Zoho Show, we design features that keep everything

      • CRM

        Is anyone else experiencing this issue? Our company is not moving out of using Gmail's web app. It just has more features and is a better email program than Zoho Mail. Gmail has an extension (Zoho CRM for Gmail) that we're using but we've found some serious

      • Good news! Calendar in Zoho CRM gets a face lift

        Dear Customers, We are delighted to unveil the revamped calendar UI in Zoho CRM. With a complete visual overhaul aligned with CRM for Everyone, the calendar now offers a more intuitive and flexible scheduling experience. What’s new? Distinguish activities

      • Global Search / Command Palette in Live App

        Zoho Creator applications can contain many forms, reports, pages, and dashboards. While navigation inside the app is smooth, users still need to move through multiple menus or screens to find specific records or open particular modules. Currently, in

      • New 2026 Application Themes

        Love the new themes - shame you can't get a little more granular with the colours, ie 3 different colours so one for the dropdown menu background. Also, I did have our logo above the application name but it appears you can't change logo placement position

      • Smarter appointment allocation with round-robin distribution

        Greetings from the Zoho Bookings team! We’re excited to introduce the Appointment Distribution feature, a new way to decide how appointments are assigned among users. By default, appointments are distributed evenly across all event types, but this enhancement

      • Analytics & Reporting Improvements + Export Bug

        Hello, I would like to raise several important product suggestions and issues regarding Zoho Expense: 1. Filter in Admin View → Analytics → Expense Details → Receipt Is it possible to add a filter that allows us to prioritize or sort reports that have

      • Make Quick Edits to Images Before Attaching

        Hello everyone, We have enhanced how attachments are handled in tickets to help agents preview and share files more efficiently in Zoho Desk. Agents can preview image attachments before adding them to tickets and edit them using attachment annotator.

      • 3/18 オンライン勉強会のお知らせ Zoho ワークアウト （無料）

        ユーザーの皆さま、こんにちは。コミュニティチームの中野です。 3月開催のZoho ワークアウトの開催が決定しましたのでご案内します。 今回はZoomにて、オンライン開催します。 ▶︎参加登録はこちら（無料） https://us02web.zoom.us/meeting/register/BoNTN7zYR8OvOPGShqBY0A ━━━━━━━━━━━━━━━━━━━━━━━━ Zoho ワークアウトとは？ Zoho ユーザー同士で交流しながら、サービスに関する疑問や不明点の解消を目指すイベントです。

      • Extend color coding to custom picklist fields

        Objectively, Projects has the best UI of any Zoho app — clean, intuitive, and never feels bloated. Big props to whoever owns the design. Feature request: color coding for custom picklist field values in field customization. You've already done it in two

      • New in Office Integrator: In-sheet text translation

        Hi users, We're pleased to introduce translation capability in the spreadsheet editor in Zoho Office Integrator. This allows you to translate the text in your spreadsheet's cells into 70+ languages from within your web app. Office Integrator's spreadsheet

      • Streamline email communication with Out of Office configuration

        Managing user communication effectively is the key to ensuring timely responses and consistent messaging. However, when users are unavailable, the absence of an Out of Office response can lead to delays and missed expectations. Managing these settings

      • Changing settings for auto logoff

        I've noticed that when I haven't used Cliq for a while, I have to re-enter my password. That is really clumsy, especially if you have a complicated password. Because it won't be filled in automatically. Is there a way to change that behaviour? We are

      • A few Issues when using "Pay Bill via Check"

        We have quite a bit of issues with how paying for Bills via Check works. Would love some feedback from the Zoho team in case we are doing something incorrectly. 1. When we go from a vendor and select "Pay Bill via Check" option, we see ALL the outstanding

      • Prevent tracking users from specific countries

        Currently, I’m receiving many bot visits from the United States and Malaysia. I would like these visits not to be recorded in SalesIQ. I already enabled the option to exclude traffic from cloud service providers, but I’m still receiving bot visits. Ideally,

      • Next Page