Kaizen 200 - OAuth and Token Management using Zoho CRM Python SDK

Kaizen 200 - OAuth and Token Management using Zoho CRM Python SDK



We’re incredibly excited to bring you the 200th post in our Kaizen series!

Idea
This journey has been as much about listening as it has been about sharing. And today, we’re making both count. Over the past few weeks, we’ve collected your feedback through the Kaizen feedback form added in our earlier posts. Thank you for the time and thought you’ve put into it.

Starting today, we’ll be actively addressing your most requested topics. 

Overview – OAuth 2.0 and Zoho CRM SDKs

In this Kaizen, we’ll walk you through how OAuth 2.0 authentication is handled using the Zoho CRM Python SDK, and how the SDK simplifies token refresh, storage, and management for multiple users and organizations across multiple data centers.

Introduction:


OAuth2.0 Recap:



Token Management using Zoho CRM SDKs:


Sample Project Overview

We’ve used a fully working sample project to demonstrate the OAuth flow in action.

Frontend

A static interface built using HTML, CSS, and JavaScript.
Files include:
  • index.html – login and data input page
  • script.js – client-side login and record handling
  • redirect.html – used to capture the grant token from Zoho

Backend

A Python server using Zoho CRM SDK to:
  • Authenticate users using OAuth 2.0
  • Store and manage tokens
  • Fetch and manipulate CRM records

Note:

Before running the project, you’ll need to register your client in the Zoho API Console. Once registered, use the generated Client ID and Client Secret in your server code.
If you're planning to support users across multiple Zoho Data Centers (DCs):
  • Be sure to enable Multi-DC for your client.
  • Use the same client credentials (Client ID and Secret) for all the DCs during authentication.

Implementation Demo:

How the SDK Maps Tokens to Users

One of the key challenges in multi-user apps is ensuring that each user's tokens are stored and retrieved correctly. The Zoho CRM Python SDK handles this automatically.
As part of the OAuth flow, the SDK retrieves the user's email and organization info in the background using the scopes ZohoCRM.users.READ and ZohoCRM.org.READ. It then uses this unique user–org combination to:
  • Store access and refresh tokens separately for each user
  • Automatically update tokens when a user logs in again
  • Ensure that all API calls are authorized with the correct tokens
If you're implementing Login with Zoho using the standard OAuth redirect flow, all of this is handled internally by the SDK using the user and org information retrieved during login. There’s no need to manually pass a UserSignature in the token object.
 
If you're not implementing Login with Zoho, or if you’d prefer to explicitly associate a token with a known user, you can pass a UserSignature object during initialization:
  1. from zohocrmsdk.src.com.zoho.api.authenticator import UserSignature

    user = UserSignature(email)
    token = OAuthToken(..., user_signature=user)
    Initializer.initialize(..., user=user)
This ensures the SDK can correctly identify the token's owner and separate tokens for different users or orgs in a multi-user application.

Multi-User & Multi-DC Token Management


Authentication can often be one of the trickiest parts of any integration, especially when you're dealing with multiple users, environments, and token refresh cycles. With the Zoho CRM SDKs, much of that complexity is handled for you, from generating and persisting tokens, to refreshing them silently when they expire, and managing user-org mappings behind the scenes.

We hope this Kaizen gave you a clearer picture of how to use our SDKs confidently in your apps. Try out the project, play around, and see how it all works in real time. 

If you have any queries, let us know the comments below, or send an email to support@zohocrm.com. We'd love to hear from you.




      • Sticky Posts

      • Kaizen #197: Frequently Asked Questions on GraphQL APIs

        🎊 Nearing 200th Kaizen Post – We want to hear from you! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.

      • Kaizen #198: Using Client Script for Custom Validation in Blueprint

        Nearing 200th Kaizen Post – 1 More to the Big Two-Oh-Oh! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.

      • Celebrating 200 posts of Kaizen! Share your ideas for the milestone post

        Hello Developers, We launched the Kaizen series in 2019 to share helpful content to support your Zoho CRM development journey. Staying true to its spirit—Kaizen Series: Continuous Improvement for Developer Experience—we've shared everything from FAQs

      • Kaizen #193: Creating different fields in Zoho CRM through API

        🎊 Nearing 200th Kaizen Post – We want to hear from you! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.

      • Client Script | Update - Introducing Commands in Client Script!

        Have you ever wished you could trigger Client Script from contexts other than just the supported pages and events? Have you ever wanted to leverage the advantage of Client Script at your finger tip? Discover the power of Client Script - Commands! Commands

        • Recent Topics

        • Marketing Automation List Entry Criteria is no longer an option

          For a couple of years now we have used the "List Entry Criteria" option to filter our Journey recipient list. All of a suddent the option no longer exists for New Lists and I can only delete the option from existing lists but can no longer edit it. Anyone

        • GCLID arrives not in CRM with iframe integrated ZOHO Form

          Hello amazing community, I enabled Adwords integration in ZOHO CRM. I have a ZOHO Form integrated in a wordpress. I tested iframe and Javascript. I enabled the "handover" GCLID in the ZOHO Form. When I add a GLID with http://www.example.com/?gclid=TeSter-123.

        • 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

        • Add Webhook Response Module to Zoho Flow

          Hi Zoho Flow Team, We’d like to request a Webhook Response capability for Zoho Flow that can return a dynamic, computed reply to the original webhook caller after / during the flow runs. What exists today Zoho Flow’s webhook trigger can send custom acknowledgements

        • Bidirectional sync between Zoho Bookings and Zoho CRM - Part 1

          Hey, community members! The default integration between Zoho CRM and Zoho Bookings is unidirectional, which means that any appointments booked, rescheduled, or deleted in Zoho Bookings will be reflected in Zoho CRM. However, any modifications made to

        • Is it possible to edit placeholder text?

          In the master slides I want to make sure my templates have more meaning for the users and want to replace the standard placeholder text with something more instructional. Instead of "Click to edit Mast subtitle styles" I want to have "Click to enter reporting

        • Delay function execute

          I've got a workflow which uses a webhook to send information to Flow, which in return updates a record in Creator. Problem is, by the time this has executed, the rest of my script has run and can't find the (yet to be) updated info in the record. Is there

        • How to allow download of a file AFTER information is collected?

          I can't find this anywhere. Can someone help with what seems to be a pretty basic web function today? - File is stored in Workdrive - Prospect goes to a URL where the file is located - System requests prospect to enter "Name" and "Email" - An email is

        • Add Baseline methods to API

          There are no API methods for creating or querying baselines,  Use case: Customer is notified of the current project start date according to plan via another product/integration. We would like to auto create a baseline (Automated via API) at the point

        • Bulk Fill In & Edit PO/Bill/SO/Invoice

          Hello, I am adding stock in bulk on a PO, the system is automatically populating the Rate (price) and Tax from the item data. Problem is that the bill rate is different from the rate on the item data, so I have to manually erase each and enter the price.

        • Fixed Assets beg balance

          Hello, I trust you are well I'm a new zoho books user and I find it difficult to plug in the fixed assets balance and here's what I have done: 1- I imported the fixed assets data into the fixed assets module as per the instructions 2- the import process

        • Syncing with Google calendar, Tasks and Events

          Is it possible to sync Zoho CRM calendar, task and events with Google Calendar's tasks and events. With the increasing adoption by many major tool suppliers to sync seamlessly with Google's offerings (for instance I use the excellent Any.do task planning

        • CRM Deluge how can link attach file with workdrive file.

          Hi, We have create file at workdrive and would like to link to attachment at crm module by deluge. Right now can only upload it to attachment but can not link the file from workdrive. Thank you

        • Feature announcement: AI-powered document generator in Zoho Sign

          Hi there! We recently announced manual document creation by offering an editor within Zoho Sign. Today, we are excited to announce AI-powered document generation to help you draft agreements, purchase orders, and other important business documents in

        • Permanently deleted files

          Is there a way to get back permanently deleted files from your account if they were accidentally deleted and no longer recoverable from the recycling bin? I know I am probably screwed but I just figured I would ask.

        • Shared Mailbox in iOS app

          Hi, On the desktop I am using a Shared mailbox for our company's general mailbox that somebody else should be able to view. In the iOS app however I can't find it? Old sources on the internet says this isn't possible but that can't be right? Somebody

        • Tip #41- Simplify Compliance and Efficiency with Zoho Assist’s Data Cleanup Feature- 'Insider Insights'

          Managing device data efficiently is just as important as securing remote access. With Zoho Assist’s Data Cleanup feature, admins can easily remove outdated or unnecessary device records, keeping the console organized and secure. This action is carried

        • Revenue Management: #6 Revenue Recognition in Professional Services Industry

          If you run a consulting firm, agency, or any service-based business, you have a situation where you have signed the contract, maybe even sent the invoice, and have received some initial payments. So, can you consider this as revenue? What if the project

        • Zoho fsm scheduled maintenance dispatch

          Hi, I'm reaching out regarding an issue I'm encountering with the Scheduled Maintenance feature in Zoho FSM. I’m trying to configure it so that it automatically dispatches all maintenance jobs scheduled within the next 150 days, starting from today. However,

        • Template modifiactions

          Hello, I am struggling with the templates in ZOHO Books. Especially with the placement of some items, like company address, ship to, bill to etc.  For example: One item I like from template X (placement of ship to and bill to next to each other in the

        • zoho.inventory.getRecords returns no records

          I running a custom function (Deluge) in Zoho Flow with a connection to Zoho Inventory. To debug the problem, I created the test function below. It returns "Number of contacts fetched: 0". This confirms that there's no issue with the org ID or connection

        • Zoho Campaigns Event timestamps do not propagate to Zoho CRM

          We have integrated Zoho CRM and Zoho Campaigns. But when looking at Contact records, the Campaign event data is missing the actual timestamps: especially when a particular email was sent. They're not in the Campaigns related list, and the cannot be found

        • Feature announcement - Simplifying document creation with Zoho Sign

          Hi there, We are pleased to announce the release of our document creation feature, enabling you to create, edit, and finalize documents like agreements, purchase orders, and contracts without relying on external tools or applications. <br> This

        • Integrating File Attachments in Zoho Flow Email Notifications

          Hi, I would like to be able to send an email once an entry is made in a form, and in this email, I would like to attach a file that has been added to the form using the ImageUpload (or FileUpload) widget. So, I started by creating a flow that will trigger

        • Zoho Mail SMTP IP addresses

          We are using Zoho Mail and needs to whitelist IP for some redirections from your service to another e-mails. You can provide IP address list for Zohomail SMTP servers?

        • Zoho project purchases

          Hi Folks, I think having a purchase module in projects will help in putting together a project p and L. Project wise purchases and expenses.  Do let me know your thoughts.

        • Create Tasklist with Tasklist Template using API v3

          In the old API, we could mention the parameter 'task_template_id' when creating a tasklist via API to apply a tasklist template: https://www.zoho.com/projects/help/rest-api/tasklists-api.html#create-tasklist In API v3 there does not seem to be a way to

        • How can I restore all the deleted Time entries of a Task in Zoho Projects

          How can I restore all the deleted Time entries of a Task in Zoho Projects? Query: In Zoho Projects, I cloned a task and deleted the time entries from the cloned task. However, this also deleted the time entries from the original task. How can I restore

        • Is there a way to make an account inactive in ZoHo Desk

          We have a few Clients "Accounts" that we no longer do business with. It would be beneficial for them to not show up in lists. However, we want to go back and view tickets, time, etc.

        • How to set the value of the Phone field importing contacts in Zoho Desk

          Hi everyone, i'm new in Zoho Desk, we're setting up the environment and i'm importing contacts from another CRM using a file CSV and i'm getting a problem with phone numbers (italian): the leading zero is cut away, also if the value is inside double quotes.

        • Set Custom Icon for Custom Modules in new Zoho CRM UI

        • Deprecation Notice: OpenAI Assistants API will be shut down on August 26, 2026

          I recieved this email from openAI what does it means for us that are using the integration and what should we do? Earlier this year, we shared our plan to deprecate the Assistants API once the Responses API reached feature parity. With the launch of Conversations,

        • How to center a field inside a section?

          I’ve been trying to center a field inside a section in Zoho Canvas. When I align it visually, it looks centered in the editor, but after clicking Save, the field appears misaligned on the actual canvas. I also tried setting the field to full width, but

        • Kaizen #192 - Implementing Custom Token Persistence in Python SDK

          Welcome back to another week of Kaizen! Last week, we discussed how to implement Login with Zoho using OAuth 2.0 and saw how to bring it to life in a real-world application with the Zoho CRM Python SDK. We also discussed how Zylker Academy built a custom

        • Showing the map along with mileage expense

          When you use the GPS to track mileage, it shows you the map of the actual path travelled. It would be very useful and practical to save that map with the mileage expense, so that when the report is created, it provides a map of each mileage expense associated

        • Enable Validation Rule for Multi-Select Picklist Field

          Zoho, Please allow validation rules for multi-select fields.

        • File Upload field not showing in workflow

          Hi, I have added a field on Zoho CRM. I want to use it in a workflow where that particular field is updated based on another field, however it is not showing up in the field list to select it in the workflow. Why is this please?

        • CRM Custom function updating a module record shows the Super Admin user as the record modifier

          Dear Zoho CRM Team, Is there any way to update this so that when a custom function has updated a record the Super Admin user doesn't become the modifier? This happens on the record as a modifier and shows up in the audit logs. It would be more useful

        • Best practice importing items and matching assemblies

          Hi, I was wondering what would be the best practice to import items and composite items (assemblies) From my backup, what should I import first? The items or the composite items? I am on Zoho one, using inventory and books. Kind regards, Sabine

        • Best way to fetch employee names from Zoho People into Zoho Creator Inventory Stock Form field Employee Name Lookup

          Hi Team, I have a requirement in my Zoho Creator application (Inventory Stock Adjustment) where I need to fetch employee names from Zoho People and use them as a lookup in a form. Currently, I am considering using an integration field to fetch this data

        • Next Page