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

    • Make Packages from multiple sales order of a single customer

      Our customers sends orders to us very frequently, some times what customer wants is to ship items from 5 to 6 sales orders in a single shipment. it will be very nice if, zoho can implement this function, in which we can select items from other sales orders of the customer.

    • Webhooks and Integration

      Hey, I was looking to create automation using webhooks or something equivalent of a trigger based mechanism, to connect it as an integration. But I don't find any relevant APIs to setup these webhooks/notifcations for the "Zoho Books". Can anyone please

    • Zoho Books X Zoho Expense

      Hello there, Please can you tell me if it is possible to sync from Books to Expense? I much prefer the Expense reports to that of Books and the Credit Card feeds work via expense and not Books for me. However I find books is much better to deal with the

    • ABILITY TO LOG INTO CUSTOMER PORTAL

      I think it would be very helpful to have a button in Zoho Books to be able to see the customer portal so we can see what they see to help them navigate through the portal. Many times, the customer will call about the portal, but without visibility into

    • Sort, filter & save views for BOOKS PROJECTS

      Thanks for all the updates. Our firm uses the module for simple internal project accountancy. This means we do everything from the Projects Section but this isn't user friendly at all. You can't do anything with customized your own fields which basically

    • edit input format in custom field - sales order

      hi, I want to integrate a custom field (multi line text box) in our sales order. It needs to show upper case and lower case letters, numbers, spaces, hyphens and "/". What do I need to put in the custom format to configure these signs? Thanks, Tina

    • This transaction type cannot be matched with a line on the statement.

      When using the books API https://www.zohoapis.com/books/v3/banktransactions/uncategorized/${transaction.transaction_id}/match I get this error "This transaction type cannot be matched with a line on the statement." What I'm doing is for the uncategorized

    • Full Text Customization & Translation in SalesIQ Chat Widget Settings

      Dear Zoho SalesIQ Team, Greetings, We would like to request an important enhancement to the chat widget customization options in Zoho SalesIQ. Current Limitation: At the moment, only some of the text shown in the chat widget is editable or translatable

    • Power of Automation :: Quick way to associate your Projects with Zoho CRM

      A custom function is a software code that can be used to automate a process and this allows you to automate a notification, call a webhook, or perform logic immediately after a workflow rule is triggered. This feature helps to automate complex tasks and

    • Timesheets

      I wanted to create the timesheets remainder for our team mates who miss out the weekly timesheet entries. While creating the email templates, I couldn't see anything related to timesheets. Since it shows projects Can you help me find and build a one

    • Can we embed a Kanban Type of report using iframe too?

      I tried embedding a report as iFrame but it only appear as List View. It would be helpful if can also embed a Kanban Type of report.

    • Weekly Tips : Save Time with Saved Search

      Let's assume your work requires you to regularly check emails from important clients that have attachments and were sent within a specific time period. Instead of entering the same conditions every time—like sender, date range, and attachments included—you

    • Big Things Just Dropped in the SalesIQ Universe: Top Upgrades You’ll Love in Nova’25

      Nova'25 has landed, and it’s packed with meaningful upgrades to help you engage smarter, work faster, and scale with ease. Whether you're into proactive messaging, smarter automation, or better admin control, there's something here for everyone. Here's

    • Hidden Fields with Data Pre-Population and Notification Integration in Zoho Bookings Forms

      Dear Zoho Bookings Support Team, We'd like to propose a feature enhancement for Zoho Bookings forms that would improve data management and workflow efficiency: the ability to create hidden fields with pre-populated data. Current Functionality: Zoho Bookings

    • Tip #37 – How to ensure compliance and accountability using Advanced Session Audit – ‘Insider Insights’

      Hello Zoho Assist Community! This week we will be discussing how to strengthen your remote support operations with better visibility and control. Let’s say your support team handles a growing number of remote sessions each day. At the end of the week,

    • Replace an existing zoho show file with an uploaded one.

      For Zoho WorkDrive Upload API method, I have override-name-exist option, which I can use like this: curl https://www.zohoapis.eu/workdrive/api/v1/upload \ -F "filename=mypres.pptx" \ -F "parent_id=j3tzq1ae09c0cd91540df8d01670af05b657e" \ -F "override-name-exist=true"

    • Tip of the Week #66– Use internal comments to collaborate and resolve issues faster!

      Ever found yourself stuck on a customer query because you needed inputs from your teammate? Or sent a reply too soon and realized later that someone else on your team had a better context? When you rely on back-and-forth messages in external chats or

    • Using Zoho One to manage two (or more) businesses

      We are one company that operates two business, a scenario that Zoho One doesn't really seem to handle very well, and one which I can't imagine is at all unique to us! (It is basically designed to facilitate branding and use for one business only per subscription).

    • Skip order confirmation step in commerce?

      We have a store to sell products that are not shipped to a customer. Right now, when the order is placed, we have to manually 'confirm' the order so the sales order can convert to an invoice and charge the customer.  Is there a way to skip the manual

    • Free Shipping Coupon - Zoho Commerce

      I love the Zoho platform. Zoho Commerce is no exception; however, I'm struggling with a few common features I cannot find or are missing that I hope someone can help me with. Is there a way to create a coupon code for free shipping?

    • Is there a way to link an item to a liability account?

      I collect customer deposits for certain services and hold them in a liability account. However, Zoho Books doesn't let you create an item and assign it to a liability account so how do I create an invoice with an item that records it as a deposit into

    • Select a balance sheet account when creating an invoice

      Hi, it would be very helpfull to be able to select a balance sheet account when invoicing clients. We bill 30% of the job at signing and we would like to add to deferred revenues.  I have to create a transit revenue account and then tranfer to the right

    • How to work out commission in zoho commerce based on coupons

      HI There Is there any way to produce report based on coupon name in zoho commerce We need to pay commission to various channels who are helping us to increase the online sales so we have number dedicated coupons assigned to the above mentioned channels

    • Request for Subform Styling Feature in Zoho CRM Canvas

      Dear Zoho CRM Team, We have observed that in the Zoho CRM Canvas view, it is currently not possible to set presets or manage the styles of subform fields. Additionally, the ability to edit subform data directly within the Canvas view appears to be limited

    • How to Delete Old Tasks/Streams Assigned by Deactivated Users? 'Operation Not Permitted' Error

      Hello, I’m using Zoho Mail and have several old tasks assigned to me in Tasks and Streams. These tasks were created by former employees whose accounts are now deactivated. When I try to delete these tasks, I get an "Operation Not Permitted" error. These

    • Zoho Books - Sales Person Contact Details on Quotes

      Hi Zoho Books Team, I've had various clients ask me about showing the phone number and email of the sales person on Quotes to help eliminate any barriers to closing sales. When I tell them that it is not possible they are always surprised and say something

    • Related products category instead recommended products.

      Hi there, It is possible to show related products of the same category (as it works in the rest of the ecommerce) instead of showing recommended products.

    • Uploading PDF files

      How do I upload a PDF file to my ZOHO site?

    • How to send invoices to 2 emails?

      Hi! We are sending invoices to the "Customer email" field that is defined Zoho Books and is obtained/synced from a custom email field in Zoho CRM. But in some clientes, the invoices have to be sent to 2 emails and we are wondering how this could be accomplished.

    • It returns 1 record

      Var1= Tools_Request[Liability_Receipt == input.Liability_No]; for each rec in Var1.Tool_Request_Description { Var2= (ET_Inventory[SKU == rec.Tools_SKU].SKU).getAll(); } info call for Var2 It only fetch 1 record On record file

    • Narrative 5: The essential role of SLAs

      Behind the scenes of a successful ticketing system - BTS Series Narrative 5: The essential role of SLAs Every organization that interacts with customers establishes a timeframe within which agents should respond to queries as part of a service level agreement

    • Nextdoor Integration

      Does Zoho social work with Nextdoor? www.nextdoor.com? Are there any plans for an integration?

    • My email sending has beed blocked due to high bounce rate. NEED HELP

      User ID: 886739811 Dear Zoho Team, I hope this message finds you well. My account (User ID: 886739811) was blocked from sending emails last week due to an unusually high bounce rate. This spike was caused by a bot attack on our platform, which led to

    • Can Zoho CRM Emails be used in Zoho Analytics in any capacity?

      We're wanting to display details about Lead Activity in regular reports through Zoho Analytics but we're having difficulty integrating Emails at all. We'd like to be able to note when an email is received and when it is sent somewhere other than just

    • WorkDrive Just Got Smarter: Introducing Zoho AI in WorkDrive!

      We're all looking for ways to work smarter, not harder, right? If you've been dabbling in the Zoho ecosystem, chances are you've bumped into Zia, Zoho's intelligent assistant that's quietly revolutionizing how we tackle our daily tasks. Meet Zia: Zoho’s

    • IF Statement in Zoho CRM Formula Field

      Hi, I am attempting to write a formula field that will give me one result if one statement AND another statement are true, then a different value if the first statement AND a different statement are true, else 0. Stated differently: if account = destination

    • Scheduled Maintenances

      Hi, Why is adding scheduled maintenance so arduous. It should be a simple process and take very little time for basically a recurring job. Creating 3 records with similar data seems crazy to me. Is there a easy way to do this? I have to create hundreds

    • Subform Fields for Form Rules & Subform Fields as a Condition with Form Fields as the Action

      Hi, The Subform in Field Rules is great, but it is missing completley from Form Rules and it lacks being able to have Subform Fields in the Condition while having Form Fields in the Action, it works the other way around. Thanks Dan

    • Power of Automation :: Implementing Deadline-Based Task Scoring with Custom Fields

      Hello Everyone, A custom function is a software code that can be used to automate a process and this allows you to automate a notification, call a webhook, or perform logic immediately after a workflow rule is triggered. This feature helps to automate

    • Zoho Forms - Subform Integration with Zoho CRM?

      I created a form in Zoho Forms that includes a sub-form for information that I want to integrate with the CONTACTS module. I am unable to find a way integrate/map the fields in the sub-form with the Contacts module in Zoho CRM. Is there a way to do this

    • Next Page