Kaizen #200 - Answering Your Questions | Authentication using Zoho CRM Python SDK

Kaizen #200 - Answering Your Questions | Authentication 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 #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.

    • Kaizen #226: Using ZRC in Client Script

      Hello everyone! Welcome to another week of Kaizen. In today's post, lets see what is ZRC (Zoho Request Client) and how we can use ZRC methods in Client Script to get inputs from a Salesperson and update the Lead status with a single button click. In this

    • 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

    • Recent Topics

    • Three Zoho Billing Limitations Blocking Standard Subscription Operations

      After working through Zoho Billing support for over a year on these three issues without resolution, we wanted to flag them to the broader community. We are curious whether other businesses are running into the same walls. 1. Cannot Prepone (Move Earlier)

    • SAP Business One(B1) integration is now live in Zoho Flow

      We’re excited to share that SAP Business One (B1) is now available in Zoho Flow! This means you can now build workflows that connect SAP B1 with other apps and automate routine processes without relying on custom code. Note: SAP Business One integration

    • [Action Required] : Update Shopify Access Scope to fetch complete order history

      Hello Shopify Users! Shopify has updated the access scope for apps under developer portal. With this change, the read_orders scope now provides access only to the last 60 days of order history. To access older historical orders, Shopify requires a separate

    • Advance Payment Record Removed When Deleting Applied Credit from Bill

      Hello, So while working with vendor advance payments, I noticed that removing the applied credit from a bill also removes the corresponding entry from the Payments Made section. What I did : Recorded an advance payment to a vendor through Payments Made.

    • How to Connect Zoho Books with e-Way Bill Portal (Step-by-Step Guide)

      Integrating Zoho Books with the e-Way Bill portal helps automate your logistics and compliance process. Follow the steps below to set it up easily: 🚀 How to Connect Zoho Books with e-Way Bill Portal (Step-by-Step Guide) Integrating Zoho Books with the

    • Is there a way to update all the start and end dates of tasks of a project after a calendar change?

      Hi! Here's my situation. I've built a complete project planning. All its tasks have start dates and due dates. After completing the planning, I've realized that the project calendar was not the right one. So I changed the project calendar. I now have

    • Lookup fields can't be used for anything important

      Hi It seems the lookup fields are mostly.... informative, you can at most link stuff between modules... You can't use lookup fields in blueprints, you can't use them in layout rules or anything... It that correct?

    • Sales Allowed Beyond Available Stock and Payment Recorded Without Restriction

      Hi, While testing in Zoho Inventory, I noticed that a sales order can be created with a quantity exceeding the available stock in the selected warehouse. In my case: Available stock: 5 units Ordered quantity: 6 units Despite this: I was able to convert

    • Zoho Writer Frequently not loading

      I've reported this as a problem already but I can't log into my email right now or get onto the main site so you're going to hear about it again here: at least once a week, Zoho Writer will just refuse to load entirely. The main page will load and load

    • Read Thread Details

      Does anyone know how to "read" the complete thread details in a ticket? I figured out how to pull a summary of the threads using a webhook, but it doesn't have all the details I want. I tried to create a loop in flow, which should have worked, but instead

    • How to Structure Data in Zoho Creator Applications

      Data structure is undoubtedly one of the most critical pillars in application development within Zoho Creator. Well-structured projects scale easily, enable more robust automations, and drastically reduce rework. Poorly modeled applications, on the other

    • Application Architecture in Zoho Creator: Why You Should Think About It from the Start

      Many companies begin using Zoho Creator by building simple forms to automate internal processes. This is natural — the platform is extremely accessible and allows applications to be built very quickly. The challenge begins to appear when the application

    • Captcha can't be enabled conditionally

      Hi Problem: captcha on a form can't be enabled conditionally. Why is this a problem: Because I use the same form on our website (public) in the portal and mobile app. In the portal it works but in the mobile app it doesn't. So there should be a way to

    • Improved RingCentral Integration

      We’d like to request an enhancement to the current RingCentral integration with Zoho. RingCentral now automatically generates call transcripts and AI-based call summaries (AI Notes) for each call, which are extremely helpful for support and sales teams.

    • WorkDrive issues with Windows Explorer Not Responding

      We are using WorkDrive to collaborate on editing video content. We have a lot of files and quite a few are a few gigs. Recently anytime I try and work with the files Explorer freezes for a couple minutes whether it's dragging the files into Premiere or

    • US State abbreviations in Address fields

      In regards to all Address fields within Zoho, Is there a way to change the State field to be the 2 letter abbreviation vs the full spelled out US State name? Example: "Washington" should be WA. I am able to type in the abbreviated state, but it's not

    • Is it possible to retrieve function (Deluge) code from Zoho CRM externally?

      Hi Everyone, Is it possible to fetch or retrieve the Deluge function code from Zoho CRM using an external method (API or any other approach)? I would like to know if there is any way to access or extract the function script outside of Zoho CRM, or if

    • Zoho CRM Integration Form + Custom Fields

      Hi! I've created an Integration Form from Zoho CRM's Vendors Module, but I can choose a few standard fields and no custom fields I've created in Zoho CRM. There is a plan to add this feature soon? Thanks in advance.

    • AI secretary

      In our company, Claude is the secretary and creates inquiries and schedules from Gmail. You no longer have to enter them yourself. The secret is that we created an MCP server that connects to CRM. https://x.com/Mac_nishio/status/1917954562566328694

    • Como estruturar dados em aplicações Zoho Creator

      A estrutura de dados é um dos pilares mais críticos no desenvolvimento de aplicações no Zoho Creator. Projetos bem estruturados escalam com facilidade, permitem automações mais robustas e reduzem drasticamente retrabalho. Já aplicações mal modeladas rapidamente

    • Creditos API

      Queria saber se alguém poderia me ajudar a resolver um problema na compra e utilização de créditos de mensagens API do WhatsApp. ja tentei todos o tutoriais porem não consegui realizar a compre, pois ao clicar no botão de comprar créditos aparece a mensagem

    • Using Zoho Forms vs Zoho Survey

      Hello - I'm looking for advice on whether to use Zoho Survey or Zoho Forms for our small non-profit. We have a Zoho One subscription, so have access to both. The main use case at the moment is application forms for our professional development programs.

    • Custom CSS for Zoho CRM Team Bookings embeded widget

      Hello, we are adding Zoho CRM Team Bookings (crm.zoho.com) in our public website. We know that we can change Theme Color, Font Color and Background Color: Zoho CRM Booking Styling But is it possible to change other CSS attributes e.g. Font Family, like

    • Dashboard target enhancements

      Often individuals in IT are creating dashboards for their sales team. The ability to create a single dashboard that can be used by multiple people is key. A components for a dashboard have the ability to filter by logged in user which is great. However

    • Enable integration of CRM CPQ functionality for ZohoOne customers using Zoho Finance application

      Hi there. I can't believe I'm needing to launch this idea as I would have thought this was a little obvious. Following a number of conversations with the technical team it's become evident that the CPQ functionality within CRM cannot integrate with Zoho

    • Zoho Certified Workshops in Berlin | 20. - 21. April

      Liebe Mitglieder der deutschen Zoho-Community! Wir freuen uns, Ihnen mitteilen zu können, dass unsere Zoho Certified Workshops am 20. und 21. April nach Deutschland zurückkehren! 📍Wo finden die Workshops statt? Die zertifizierten Workshops finden im

    • Zoho Payroll Expansion Plans

      Dear Zoho Team, I truly appreciate the continuous innovation and improvements you bring to your suite of products. However, I—and I’m sure many others—would love some clarity on your Zoho Payroll expansion roadmap. Currently, it’s only available in the

    • Is there a way to show contact emails in the Account?

      I know I can see the emails I have sent and received on a Contact detail view, but I want to be able to see all the emails that have been sent and received between all an Accounts Contacts on the Account Detail view. That way when I see the Account detail

    • Usar o Inventory ou módulo customizado no CRM para Gestão de Estoque ?

      Minha maior dor hoje em usar o zoho é a gestão do meu estoque. Sou uma empresa de varejo e essa gestão é fundamental pra mim. Obviamente preciso que esse estoque seja visível no CRM, Inicialmente fiz através de módulos personalizados no próprio Zoho CRM,

    • How do I setup the performance review module?

      I am pretty adept when it comes to learning software and I've set up quite a few Zoho Apps over the past 3 years.   But for the life of me, I can not figure out Zoho People performance reviews. I've figured out the "Organization" & LMS Modules, but the

    • Recurring Addons

      Hi, I know you can set the pricing interval for addons to weekly, monthly and yearly & set it for one off or recurring, which these are fine as a base addon item. It really would be helpful if when creating a subscription when you add on the addon item

    • Cancellation Fees

      Hi, It really would be good if Billing could take subscription management further with cancellations & being able to apply or set a cancellation fee for a plan that is either fixed or prorated. It is not uncommon in subscriptions for cancellation fees

    • Allow agents to enable or disable feed notifications from certain departments

      Hello everyone, Agents who are part of multiple departments receive feed notifications frequently from across the departments. They may not be actively involved in performing every action in all departments. For example, an agent could be a part of both

    • WorkDrive API returning empty response even after placing file in Team Folder

      Hi everyone, I am trying to fetch a file from Zoho WorkDrive using a Deluge standalone function in Zoho People. The API call executes successfully using a configured connection, but the response is coming back empty. I have verified the following: The

    • Address Typeahead Extension for Zoho Books

      I installed the Address Typeahead extension for zoho books but when I went to configure it, it said that that version was deprecated. Is there a newer version somewhere?

    • Transaction Rules & Customer Payments

      So I have a situation as follows. We have many clients who are all invoiced on the 1st of each month on a recurring invoice for 1 of 10 plans. This means that almost all payment dates are the same (some people pay late) and that a lot of the amounts are

    • Can I Integrate ADP Payroll with Zoho Books?

      Hi, I am hoping that I can integrate ADP Payroll with Zoho Books so that I do not need to manually input the payroll journal entries. Is this possible? If so, how do I do that?

    • Zoho Books | Product updates | February 2026

      Hello users, We’ve rolled out new features and enhancements in Zoho Books. From Advanced Reporting Tags to the ability to mark projects as completed, explore the latest updates designed to improve your bookkeeping experience. Introducing Advanced Reporting

    • Darshan Hiranandani : How many participants can join a Zoho Meeting at once?

      Hi everyone, I'm Darshan Hiranandani, trying to find out the maximum number of participants that can join a Zoho Meeting at once. Has anyone here used Zoho Meeting for larger groups and can share their experience or knowledge about the participant limit?

    • Ask The Expert: Deep Dive into Zoho CRM, Desk, SalesIQ, and Campaigns!

      Are you using Zoho to power your sales, support, and marketing, and have questions about configuration, automation, or best practices? We have great news: the “Ask The Expert” session is coming to the Zoho Benelux Community! This session is specifically

    • Next Page