Kaizen #116 - Client Types in Zoho API Console

Kaizen #116 - Client Types in Zoho API Console

Hello everyone!
Welcome back to another post in the Kaizen series!

This week, we will discuss different client types available in Zoho API Console, and when to use each.

When you register an app in Zoho API Console, you typically choose a client type based on how your application interacts with Zoho services.
Let us discuss the available client types and how authorization is handled for each.

Available client types

  1. Server-based
  2. Client-based
  3. Self client
  4. Non-browser-based
  5. Mobile-based

1. Server-based

If you have a web-based application that runs on a dedicated HTTP server and interacts with Zoho services by calling Zoho APIs via that server, you must register your app with this client type.
This client type is for applications that redirect the users to another URL on a web browser to authorize themselves, where they give consent to your application to use their data.
In other words, you must use this client type when you have a front-end web UI and require user intervention before your app can access user data via the dedicated server.

Consider that you are developing a web-based custom application. Users authorize that app via browser to allow their Zoho CRM data to be accessed and used by that application.
During the registration process in Zoho API Console, you would choose the "Web-based" client type.
OAuth 2.0 would be used for user authentication, allowing your app to securely access and interact with Zoho CRM data on behalf of the users.

Here is a gist of what happens:
  1. Users visit your website where you have the Login with Zoho button.
  2. When a user clicks it, that user will be redirected to accounts.zoho.com with the details of your app such as client ID, scope, redirect uri, access type as the URL parameters.
  3. Your app must make an API call to Zoho Accounts with the client ID, scope, redirect uri, and access type. Users are shown the data that your application wants to use.
  4. When users give their consent, Zoho redirects them back to your app.This will be the "Redirect URL" you give while registering your app.
  5. The redirect URL will have the authorization code(grant token) as one of the parameters, along with the location(user's domain).
  6. Your app must then make API calls from your web server to Zoho Accounts to generate access and refresh tokens with the generated grant token.
  7. You must store these tokens in your DB to access that user's data in Zoho CRM. While making API calls, you must send this access token in the header.
  8. Your app must also have the logic to regenerate access tokens from refresh tokens when the access token expires.
Note that your app must take care of storing user's details like email, organization ID, and tokens.

The following image shows the protocol flow.


You can use any of our server-side SDKs to simplify this process.
When you use our SDK, all you have to do is, generate the grant token and initialize the SDK with the client details and this token. The SDK takes care of access token generation, refreshing it, and token storage.


For more details, you can refer to the Accounts guide and CRM help doc.

2. Client-based applications

This client type is for applications that do not have a server and run exclusively on a web browser.
This is also called the Implicit flow as your app makes API calls to Zoho only when users are using your app.
This type of application loads data dynamically on the webpage, and accesses Zoho CRM data by making API calls via Javascript.

Consider the same example where there is a Login with Zoho button on your webpage.
Here is a gist of what happens when a user clicks it.
  1. Your app redirects the user to Zoho Accounts.
  2. Your app makes the authorization request with the client ID, redirect uri, scope, and response type as token.
  3. The user is shown the data that your webpage would use.
  4. When the user gives consent, Zoho Accounts sends the access token to the redirect uri as a parameter, along with the expiry time and the location of user's data in Zoho's accounts server.
  5. You can include the "email" in your scope parameter in the access token request to get user's information. The response will have a parameter called id_token that will be in the header.payload.signature format. You need to decrypt the payload section of the parameter using the base-64 decryption algorithm to get user information.
  6. Your app must then make API calls to Zoho with this access token to fetch data.
  7. When the access token expires, your app must take care of regeneration and storage.


As the API calls are made from your domain to a different domain(zohoapis.com), for security reasons, the browser will throw the CORS error. So, your domain will be registered while registering your app, and Zoho will know to allow the API calls made from that domain.

As the tokens are available on the browser itself, we recommend handling them with care.
When you use our client-side JS SDK, it automatically generates a new access token upon expiry.

3. Self Client Applications

When your application does not have a redirect URL or a UI, but performs only a backend job, and does not need user intervention, then you must choose this client type.

A self client is often used when the application and Zoho services are operated by the same entity, and you want to enable secure communication between them. For example, you have an internal reporting tool and integrate it with Zoho Analytics. In this case, both the tool and Zoho Analytics are operated by the same entity.
Similarly, consider that you have a legacy product management system and want to perform data sync between Zoho CRM and the system, then you must use the self client.

Here is a gist of what happens.
  1. You register your app as self client in Zoho API Console.
  2. You will get the client details such as ID and secret.
  3. You provide the scopes required for your app to access CRM data.
  4. You will receive the grant token.
  5. Your app must then make API calls to Zoho Accounts to generate access and refresh tokens.
  6. Your app can then use this access token to make API calls to Zoho CRM and use data.
You can refer to our older Kaizen post on this topic for more details.
Note that self client apps can also use any of our server-side SDKs. As already said, the SDK takes care of access and refresh token generation, refreshing the access token, and token storage.

4. Non-browser applications

This client type is for devices that do not have a user agent such a web browser. A TV, for instance.
Let us consider an example involving a smart TV application that integrates with Zoho ShowTime. In this scenario, the smart TV application acts as a non-browser client.
Here is how authentication is handled:
  1. You must register your smart TV app in Zoho API Console with the type "Non-browser application".
  2. Users install a dedicated Zoho ShowTime application on their smart TVs.
  3. When users launch the Zoho ShowTime application on their smart TV, they are prompted to authenticate with their Zoho ShowTime account.
  4. When they successfully authenticate, Zoho Accounts sends the grant token to your app, along with the user-code, device-code and verification URL,The user must go to this verification URL on a browser and enter the user-code to grant permission to the app.
  5. Meanwhile, your app must poll the accounts server using the grant token to check if the token has been received.
  6. When the user enters the user code, Zoho Accounts sends the access token to your app.
  7. Your app can then use the access token to make API calls to Zoho. Your app must take care of token storage and renewals.

Here is the protocol flow. For more details, refer to this doc.


5. Mobile-based applications

You must use this client type when you have developed an app exclusively for mobile devices. The protocol flow is similar to server-based application where a browser session is required for the users to authenticate.



Similar to server-side apps, mobile apps also need to handle redirection, token generation and storage.
If you use any of our Mobile SDKs, the SDK itself handles token generation and storage.

We hope you found this post useful. Let us know your thoughts in the Comment section or write to us at support@zohocrm.com.


Cheers!

    • Sticky Posts

    • Kaizen #222 - Client Script Support for Notes Related List

      Hello everyone! Welcome to another week of Kaizen. The final Kaizen post of the year 2025 is here! With the new Client Script support for the Notes Related List, you can validate, enrich, and manage notes across modules. In this post, we’ll explore how

    • Kaizen #217 - Actions APIs : Tasks

      Welcome to another week of Kaizen! In last week's post we discussed Email Notifications APIs which act as the link between your Workflow automations and you. We have discussed how Zylker Cloud Services uses Email Notifications API in their custom dashboard.

    • Kaizen #216 - Actions APIs : Email Notifications

      Welcome to another week of Kaizen! For the last three weeks, we have been discussing Zylker's workflows. We successfully updated a dormant workflow, built a new one from the ground up and more. But our work is not finished—these automated processes are

    • Kaizen #152 - Client Script Support for the new Canvas Record Forms

      Hello everyone! Have you ever wanted to trigger actions on click of a canvas button, icon, or text mandatory forms in Create/Edit and Clone Pages? Have you ever wanted to control how elements behave on the new Canvas Record Forms? This can be achieved

    • Kaizen #142: How to Navigate to Another Page in Zoho CRM using Client Script

      Hello everyone! Welcome back to another exciting Kaizen post. In this post, let us see how you can you navigate to different Pages using Client Script. In this Kaizen post, Need to Navigate to different Pages Client Script ZDKs related to navigation A.

    • Recent Topics

    • [Early-access] Introducing Zoho's CommandCenter - Cross-Zoho business process automation

        Resources to help Webinar recording | Documentation  Feature Restrictions Currently available on early-access only for US data center accounts Features Role CommandCenter as a Service uses signals across Zoho services to propel the movement of records

    • Rebranding Options for Zoho One

      We need the addition of rebranding and white-labeling settings directly within the Zoho One Admin Panel. This feature should allow organizations to customize the unified portal with their own logo, brand colors, and custom domain mapping (e.g., portal.company.com).

    • Zoho CRM for Everyone's NextGen UI Gets an Upgrade

      Hello Everyone We've made improvements to Zoho CRM for Everyone's Nextgen UI. These changes are the result of valuable feedback from you where we’ve focused on improving usability, providing wider screen space, and making navigation smoother so everything

    • Zobot drop down list

      Hi, I am trying to create a drop down list in Zobot by creating a plug. I think I am close but I just can't get it over the line and was hoping that someone could help me. I had a little bit of help getting the script started (hence the comments) // Deluge

    • Zoho vault instal on windows

      I am trying to use Zoho Vault Desktop for Windows, but I am unable to complete the sign-in process. Problem description After logging in to my Zoho account and clicking Accept on the authorization page, nothing happens. The application does not proceed

    • How to compare a subform lookup field that allows multiple entries when edited

      I have a form with a subform with multiple fields. One of the fields is a lookup field that allows a multi select. On edit validation, I want a workflow to execute only when the entries in that subform field has changed. The old. function is not working

    • Translation of Tooltip Messages

      The descriptive help messages should be available to provide translations for.

    • Allow all Company Users to view all projects, but only owner/admins can change projects

      I was wondering if there was a permission setting I could adjust to allow all our company users to see all projects created. Then, only the project owners and admins with the change permission. Thanks

    • Business Day Logic Update: More Accurate Scheduling for Your Workflows

      Hello everyone, We’re improving how business-day calculations work in workflows, especially when triggers happen on weekends. This update ensures that offsets like +0, +1, and +2 business days behave exactly as intended, giving you clearer and more predictable

    • Lead Blueprint transition in custom list view

      Hi, Is It possible to insert the Blueprint transition label in a custom Canvas list view? I am using Lead module. I see the status, but it would be great if our users could execute the Blueprint right from the list view without having to enter the detailed

    • Email Notifications not pushing through

      Hi, Notifications from CRM are not reaching my users as they trigger.  We have several workflow triggers set up that send emails to staff as well as the notifications users get when a task is created for them or a user is tagged in the notes.  For the past 6 days these haven't been coming through in real time, instead users are receiving 30-40 notifications in one push several hours later.  This is beginning to impact our daily usage of CRM and is having a negative effect on our productivity because

    • Data Processing Basis

      Hi, Is there a way to automate the data processing for a candidate every time an application arrives from job boards, without requiring manual intervention? That is, to automatically acquire consent for data processing. I've seen a workflow that allows

    • Internal Error When Accessing Team Inbox.

      All our users are seeing this error in teaminbox. Because its a critical tool kindly resolve this issue ASAP.

    • Zoho → ShipStation Integration – Sales Order–Driven Fulfilment Workflow

      Hello All, I’m reaching out to explore the best way to integrate a shipping tool into our inventory which will speed our process up. We are looking to integrate ShipStation into our existing order-to-fulfilment workflow, as we’re keen to standardise on

    • Is there an equivalent to the radius search in RECRUIT available in the CRM

      We have a need to find all Leads and/or Contacts within a given radius of a given location (most likely postcode) but also possibly an address. I was wondering whether anyone has found a way to achieve this in the CRM much as the radius search in RECRUIT

    • Sub-Form Padding in CSV Export

      Hi, When you use the Sub-Form, and for example you have a Date Field on the Main Page, then Option 1 and Option 2 fields on the Subform, when you export this to CSV the Date column will only have the Date in 1 row, the first row, it would be nice to pad

    • CRM gets location smart with the all new Map View: visualize records, locate records within any radius, and more

      Hello all, We've introduced a new way to work with location data in Zoho CRM: the Map View. Instead of scrolling through endless lists, your records now appear as pins on a map. Built on top of the all-new address field and powered by Mappls (MapMyIndia),

    • Allow Text within a Formula

      Hi, I would like to be able to use this for others things like taking an existing Date Field and copying its value, so by entering getDay(Date)&"-"&getMonth(Date)&"-"&getYear(Date) it results in 01-02-2026. And then when the Date is changed so is this

    • Change Number Field to Decimal Field

      Hi, It would be nice to be able to change the field type without having to delete it and create a new one, messing up the database and history. Thanks Dan

    • Pipeline.Company Name field shows up as numbers! [Bigin Developer Console > Component > URL]

      Hi there, I am setting up to invoke URL to send infromation zoho bigin > zoho forms with company name pre-fill in the form. however when I use : ${Pipelines.Company Name} field it shows up as a string of number instead of words. Help.

    • Ability to Edit YouTube Video Title, Description & Thumbnail After Publishing

      Hi Zoho Social Team, How are you? We would like to request an enhancement to Zoho Social that enables users to edit YouTube video details after the video has already been published. Your team confirmed that while Zoho Social currently allows editing the

    • 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

    • Print Sales Orders, Purchase Orders or Invoices from API

      Hello, Is it possible to use the print option that is available in Sales Orders Purchase Orders and Invoices with the API?. I don't see any information in the docs about this. Thanks

    • How to show a hided report??

      in CRM Report , I clicked Hide incidently , how to show the floder again? Nowhere I can find the hided report floder...

    • How to Move Behavior, Acquisition, Polls & Forms Data from Zoho PageSense to Zoho Analytics?

      Hi Zoho Community, I'm looking for a way to transfer data from Zoho PageSense to Zoho Analytics, specifically: Behavioral data (clicks, scrolls, heatmaps, etc.) Acquisition data (traffic sources, campaigns, etc.) Polls and forms data As far as I can tell:

    • How create a draft via workflow?

      I wish to create a workflow rule for specific emails that creates a draft response - not an automatic email reply, but just a draft with a set response ready to be verified by an agent who can then manually select recipients. Alternatively, the workflow

    • Zoho Social - Feature Request - Non-US Date Format

      Hi Social Team, I have noticed that there is no option to change the date format from US mm/dd/yyyy to others like dd/mm/yyyy. It would be great to see this added as the platform matures. Thanks for considering this feedback.

    • Google Fonts Integration in Pagesense Popup Editor

      Hello Zoho Pagesense Team, We hope you're doing well. We’d like to submit a feature request to enhance Zoho Pagesense’s popup editor with Google Fonts support. Current Limitation: Currently, Pagesense offers a limited set of default fonts. Google Fonts

    • Dependent / Dynamic DropDown in ZohoSheets

      Has anyone figured out a way to create a Dropdown, the values of which is dependent on Values entered in the other cell ?

    • In arattai received message can't be deleted

      The issue has been noticed in following: arattai app (Android) arattai app (Window) arattai web While the message posted by me may be deleted, the ones received from others can't be. The item <Delete> change to <Report> when the message is a received

    • Zoho CRM Community Digest - December 2025 | Part 1

      Hello Everyone! In the first half of December, Zoho CRM rolled out auto-invite for portals, smarter CPQ with Zia suggestions and price rules, and Query Workbench for faster query building. We also highlight other noteworthy conversations you shouldn’t

    • 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

    • Marketing Tip #15: Rank better with keyword-rich URLs for product pages

      Your product page URL is a small detail that can make a surprisingly big difference. Clean, readable URLs help in two ways: They’re easier for customers to trust and remember (no one likes clicking a link that looks messy or random). They help search

    • Zoho Flow Credits

      Hi , I would like to ask the reason why every time I added plus credit but few days later I will return back to default? (as below I add credit to 3000 but today It change back to 1000) Most important is, when the credit fully used, not any reminder to

    • Custom Module Send Email not filling To automatically after adding Email field also

      I create custom module in zohoCRM but problem is in custom module when i click send email there in popup To is filling automatic its coming empty which i need to manually add an email there. How can I fix it? I already added the Email field there, but

    • Introducing Intake Forms

      We are excited to announce the release of Intake Forms, a new feature in Zoho Contracts designed to make contract requests simple, structured, and efficient. Intake Forms allow organization members to request new contracts through a web form instead of

    • Manage control over Microsoft Office 365 integrations with profile-based sync permissions

      Greetings all, Previously, all users in Zoho CRM had access to enable Microsoft integrations (Calendar, Contacts, and Tasks) in their accounts, regardless of their profile type. Users with administrator profiles can now manage profile-based permissions

    • Date Filters in Zoho Desk Dashboard

      Hello Team, Currently, in the Zoho Desk dashboard, the date filter is available only for daily, weekly, and monthly views. Could we also add a yearly date filter to allow filtering by an entire year? Additionally, in the custom date filter, it is currently

    • eIDAS 2.0: What's changed for digital trust in Europe, and where Zoho Sign stands

      Hi there! It's that time of year when many of us get our ducks in a row. A new year often makes us reassess priorities, and for businesses in the EU, it means taking a closer look at how digital identities and electronic signatures work across borders,

    • 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

    • Next Page