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

    • 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,

    • Marketer's Space: Plan smarter with Zoho Campaigns' Calendar

      Hello Marketers, Welcome to another post! Today, we'll talk about a discreet yet significant feature that's neatly tucked inside Zoho Campaigns: the calendar. It might look like an optional but somewhat unnecessary feature that you can use occasionally,

    • User

      If user is already part of manage engine endpoint central , what hapens when i try to add them to another Zoho org / directory? Are these users added as external users?

    • 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

    • Outlook - Zoho CRM Calendar Integration

      I'm facing an issue integrating Outlook with Zoho CRM. Has anyone successfully connected their Outlook to Zoho, and are all your meetings and emails being captured correctly in the CRM? Any insights or troubleshooting tips would be appreciated

    • 【Zoho CRM】ポータル機能のアップデート

      ユーザーの皆さま、こんにちは。コミュニティチームの藤澤です。 今回は「Zoho CRM アップデート情報」の中から、ポータル機能のアップデートをご紹介します。 ポータル管理の新機能「自動招待」により、Zoho CRMからポータルへの招待を自動化できるようになりました。これまで必要だった、ユーザーごとの手動設定は不要になります。設定した条件に基づいて、対象ユーザーに自動で招待が送信されます。 ポータルの新機能 条件に基づく自動招待：指定した条件を満たすユーザーに、自動で招待を送信 招待設定：招待メールの言語を選択し、言語ごとに条件を設定可能

    • Contact data removes Account data when creating a quote

      Hi, Our customer has address fields in their quote layout which should be the address of the Account. They prefill the information, adding the account name - the address data is populated as per what is in the account - great. However when they then add

    • Export all of our manuals from Zoho Learn in one go

      Hi, I know there's a way to export manuals in Zoho Learn, but I want to export everything in one go so it won't take so long. I can't see a way to do this, can I get some assistance or is this a feature in the pipeline? Thanks, Hannah

    • Automation#31: Automate Splitting Names for New Contact Records

      Hello Everyone, This week, we present to you a custom function, which allows you to split the first and last names from the user's email ID based on the separator used in the ID. Having grown into a large firm, Zylker Techfix aims to optimize its processes,

    • Automatically remove commas

      Team, Please be consistent in Zoho Books. In Payments, you have commas here: But when we copy and paste the amount in the Payments Made field, it does not accept it because the default setting is no commas. Please have Zoho Books remove commas autom

    • Project Change Orders and Additions

      We are in the process of migrating from QuickBooks Online to Zoho Books. We have Zoho One and like the ability to sync all of our data across everything. And I like that projects work in a way that's less dumb than QuickBooks. I'm trying to figure out

    • ZOHO Desk - Description of slave ticket disappeared after Merge

      Dear Support, On Zoho Desk the description of a ticket disappeared after merging two ticket. The one which was the slave one completely disappeared. The problem that in this description there was an image which i had only on Desk in that ticket. Could

    • How do I insert a cross-reference link to a different section within one Knowledge Base article using Zoho Desk?

      I would like to insert a link within a Knowledge Base article to a different section of that same article. The section I want to link to is formatted with the Heading 3 style and is displayed within my TOC. However, I do not see any way to add a link

    • Problem Adding Facebook Account

      Hi, I'm new here, I'm having trouble setting up my Facebook account as a social channel. I think the issue is down to how my Facebook is set up, which is pretty confusing. I have a personal Facebook account (let’s called it A) which is my main Facebook

    • Zoho Desk Teams App is not loading

      Hi Zoho Desk support. Need an assistance on the Zoho Desk Teams app. Once I click View Ticket, it isn't showing anything. Kindly refer to attached: ZohoDesk Teams App_View Ticket Error.jpg For our Dashboard, we are still experiencing the same issue. Kindly

    • Zoho People - Retrieve the Leave Details - get("LeaveCount")

      Hi, Zoho People I need to collect all of an employee's leave requests for the calendar year and check how many half-days they have taken. If I run the script on the query he just modified, I can retrieve the information related to that query and use the

    • Mapping a new Ticket in Zoho Desk to an Account or Deal in Zoho CRM manually

      Is there any way for me to map an existing ticket in Zoho desk to an account or Deal within Zoho CRM? Sometimes people use different email to put in a ticket than the one that we have in the CRM, but it's still the same person. We would like to be able

    • Which WhatsApp API works seamlessly with Zoho CRM?

      I’m exploring WhatsApp API solutions that integrate seamlessly with Zoho CRM for customer communication, lead nurturing, and automation. I would love to hear insights from those who have successfully implemented WhatsApp within Zoho CRM. My Requirements:

    • Allow people to sign a zoho form by using esign or scanned signature

      Allow people to sign a zoho form by using esign or scanned signature

    • Button to Reapply Filters on Sheet(s)

      I wrote a macro that I attached to a button to reapply the filters on all my sheets and it says it works, but it doesn't actually do anything. What is wrong with it? Is there another way? Or even make it work for one sheet? Sub UniversalFilterRefresh()

    • Integrate Multiple ZohoBooks organization with zoho projects

      We have successfully connected our Zoho Books with Zoho Projects for synronizing timesheet data. Our Business specialty is, that the staff of the Main company (A) is working on several projects, but the Clients are sometimes contracted and paying to a

    • Zoho OAuth Connector Deprecation and Its Impact on Zoho Desk

      Hello everyone, Zoho believes in continuously refining its integrations to uphold the highest standards of security, reliability, and compliance. As part of this ongoing improvement, the Zoho OAuth default connector will be deprecated for all Zoho services

    • How do I add todays date to merge field

      I don't see any selection of todays date when creating a letter. Surely the date option of printing is standard? John

    • Tracking Emails sent through Outlook

      All of our sales team have their Outlook 365 accounts setup with IMAP integration. We're trying to track their email activity that occurs outside the CRM. I can see the email exchanges between the sales people and the clients in the contact module. But

    • Whats that

      Price?

    • The same Contact associated to multiple Companies - Deals

      Hi, I would like to know if there is an option to associate the same contact with multiple companies (two or more) deals, using the same contact details for all. This is because we have contacts who are linked to different companies or branches of the

    • Portals-Adjust Column Sizes

      I am trying to adjust the column widths in Portals tabs. Columns that don't need to be wide are wide and longer ones are very short. I thought adding more to the digits box in Edit would widen them, but it doesn't. Anyone know how to adjust these?

    • Add link/button to open approved record from approval list and detail views?

      Hi, How do I allow users to click on an approval record and open that submission? For example, userA submits a quotation then userB approves/rejects. They both can see the quotation on "completed task" list & detail views, but there's no way for them

    • record submitted from creator and invoice is creating in books , but the workflow of books is not tiggering on create of record in books

      record submitted from creator and invoice is creating in books , but the workflow of books is not tiggering on create of record in books headermap = Map(); headermap.put("X-ZOHO-Execute-CustomFunction","true"); response_inv = invokeurl [ url :"https://www.zohoapis.com/books/v3/invoices/fromsalesorder?salesorder_id="

    • Prevent editing of a record after getting approved/rejectedr

      Hi, I'd like to block any user from editing a record after it was approved or rejected, how can I do that?

    • Formula Field/Campo de Fórmula

      Hello everyone, I have a purchase requisition form in which each department submits a request, and the request is automatically routed to the person responsible for that department. In this form, I have several fields with the following link names: Quantidade1,

    • Formatting Problem | Export to Zoho Sheet View

      When I export data to Zoho Sheet View, ID columns are automatically formatted as scientific notation. Reformatting them to text changes the actual ID values. For example, 6557000335603071 becomes 6557000335603070. I have attached screenshots showing this

    • Feature Request - The Ability to Link A Customer with a Vendor

      Hi Finance Suite Team, Many businesses buy and sell products from the same companies or individuals. For example, a car sales business may buy a car from a member of the public, and that member of the public may also buy a new car from us. This makes

    • Long table name (sync from Zoho Creator)

      Dears, How can I remove the suffix in parentheses? These tables are synced from Zoho Creator and are treated as system tables, so their names cannot be changed. This issue makes the aggregation formulas look awful.

    • [Free Webinar] Learning Table Series - Streamlining incident management process with Zoho Creator

      Hello everyone, We’re excited to invite you to another edition of the Learning Table Series webinar. As you may already know, we've moved to a purpose-based approach in the Learning Table Series this year. Each session now focuses on how a Zoho Creator

    • Unattended - Silent

      How can I hide the tray icon / pop up window during unattended remote access for silent unattended remote access?

    • Importing into Multiselect Picklist

      Hi, We just completed a trade show and one of the bits of information we collect is tool style. The application supplied by the show set this up as individual questions. For example, if the customer used Thick Turret and Trumpf style but not Thin Turret,

    • Text snippet

      There is a nice feature in Zoho Desk called Text Snippet. It allows you to insert a bit of text anywhere in a reply that you are typing. That would be nice to have that option in Zoho CRM as well when we compose an email. Moderation Update: We agree that

    • Marketing Tip #18: Make your online store mobile-friendly to improve traffic

      Most online shoppers browse on their phones first. If your store is hard to read, slow to load, or tricky to navigate on mobile, they’ll bounce fast. A mobile-friendly store doesn’t just look nice; it improves engagement, reduces drop-offs, and helps

    • [Need help] Form closed. Please contact your form administrator for further assistance.

      https://forms.zohopublic.com/cceinfoifly1/form/CCE2025CCEFocusGroupRegistrationForm2025Fall/formperma/s_8XcLETTbFxZ_TAS4r_W6W5UBl8o5oxEnIX35IBKg4 I checked we didn't exceed the usage limit and form availability is enabled, Please help us enable this form

    • Next Page