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

    • Zoho email

      I cannot send email to mail.ru

    • 【参加無料】東京 Zoho ユーザ交流会 NEXUS ー CRMで始めるマーケティング事例 / AI活用法(Zia Agents)

      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。 3月27日(金)に東京、新橋で東京 Zoho ユーザー交流会 NEXUS を開催します！ 昨年度までより、さらにパワーアップして戻ってきました！ ユーザー活用事例は、2人のユーザーさんからお話しいただきます。Zoho サービスの活用の幅を広げたい方や、他のユーザーの利用法を気軽に知りたい方など、多くの方にとって学びのあるセッションになること間違いなしです✨ また今年は、これまで以上に、AI機能にも焦点を当てて行く予定です。 初回として、Zoho社員からZoho

    • Issue Exporting Data – CSRF Token Invalid Error

      Dear Zoho Team, We are experiencing an issue when exporting data from our Analytics workspace. Whenever we attempt to export data from our analytical pool, the system displays the following alert message: Alert Message: The CSRF token is invalid. It could

    • Deluge Learning Series – Client functions in Deluge | January 2026

      We’re excited to kick-start the first session of the 2026 Deluge Learning Series (DLS) with Client functions in Deluge. For those who are new to DLS, here’s a quick overview of what the series is all about: The Deluge Learning Series takes place on the

    • Zoho Mail 505 error I can not send email

      Hi, I’m having issues sending emails from my custom domain email address. When I send emails to Outlook addresses, I receive an “Undeliverable 505” error. However, emails send and receive correctly when I use Gmail. This is important for my business,

    • Multiple MFA Methods

      With SMS-based MFA methods being discontinued, there is now no way to have mutliple MFA methods. I'd like to add my zoho account on two seperate phones using the Google Authenticator app. In the https://accounts.zoho.com/home#multiTFA/modes you can only

    • Reuse Standalone Function

      I noticed that there's a missing information in documentation to reuse a standalone function and it is because the parameters require an argument. Here is my code and it is working. response = invokeurl [ url: "https://people.zoho.com/api/v3/function/sample/execute"

    • Domain renewals

      Need to know how hoe to renew the domain

    • MX shopify problem

      hello, i added all MX values in my shopify DNS - it shows those values on the shopify panel + your toolkit. I tried to send some email and it works, however on my gmail it says they cant verify this email. When i try to answer into my domain's email -

    • Best Way to Manage Email Notifications While Running a Strategy Website

      I am currently managing a content-based website, and I use Zoho Mail for handling contact forms, user queries, and collaboration emails. One challenge I am facing is organizing incoming emails efficiently, especially when messages come from different

    • What is the maximum email domains ?

      I help manage about 20 associations and I'm looking for a way to centralize them in one place. Does Zoho Mail pro or enterprise support 20-30 domains for 3-5 users each?

    • Add to Workdrive filter

      I'm trying to create a filter that will upload attachments in emails and the e-mail body to a folder in workdrive. I am able to do one or the other (attachment, or e-mail content), but not both. I first tried it using the "Email (EML) + attachment" option.

    • Forgot my admin Panel Id and password

      Sir, I have an account , where a domain mycityestate.in is added for Zoho email , now it is hard for me to manage email because i have forgotten the Email account and password registered with Admin Panel of Zoho. Just need email name which is registered

    • MCP no longer works with Claude

      Anyone else notice Zoho MCP no longer works with Claude? I'm unable to turn this on in the claude chat. When I try to toggle it on, it just does nothing at all. I've tried in incognito, new browsers, etc. - nothing seems to work.

    • Image Compression Options

      Much better if we have level of options to compress the image [20%, 40%...] We are dealing with service reports daily that has before and after photos (image field)- the file size too large and one thing, the current limit is 10mb or 15mb for report

    • Blocklist candidates in Zoho Recruit

      We’re introducing Block Candidate, which helps recruiters to permanently restrict a candidate from applying to current/future job openings. Once the candidate is blocked, they will no longer be able to participate in the recruitment process. This will

    • Pass shipping info to payment gateway Zoho Books to Authorize.net

      For some reason the integration from Zoho books to Authorize.net does not pass the shipping address. Authorize.net is ready to receive it, but zoho books does not send it

    • Knowledgebase SEO

      We have a custom-domain mapped help center that is not restricted via login. I have some questions: a) will a robots.txt file still allow us to control indexing? b) do we have the ability to edit the sitemap? c) do category URLs get indexed by search

    • Problem with CRM Connection not Refreshing Token

      I've setup a connection with Zoom in the CRM. I'm using this connection to automate some registrations, so my team doesn't have to manually create them in both the CRM and Zoom. Connection works great in my function until the token expires. It does not refresh and I have to manually revoke the connection and connect it again. I've chatted with Zoho about this and after emailing me that it couldn't be done I asked for specifics on why and they responded. "The connection is CRM is not a feature to

    • New Features: Repeat Last Action, Insert Cut/Copied Rows/Columns and Hyperlink

      You might have noticed the constant updates to Zoho Sheet of late. Here are 3 more features that have been added to Zoho Sheet recently: F4 - Repeat Last Action Insert Cut/Copied Rows and Columns Insert Hyperlink Here is a screen cast demonstrating each of these features. Read further below to learn more about these new features. F4 - Repeat Last Action: You can now repeat the last action you made on your spreadsheet by using the keyboard shortcut, F4. It is quite handy and helps you get your work

    • Need help getting my mail on iPhone and Tablet

      I need to access my Zoho mail via the iPhone Mail app. I have entered the login name, password and the incoming and outgoing servers, which my Mail Settings page says are imappro.zoho.com and smtppro.zoho.com. The iPhone keeps saying it cannot authenticate.

    • Add an background image to an email template in CRM

      Hi all, We wants to put an background image behind all our email templates. Is there a way to import this thru html. If i put the option background image in <body style="background-image:...</body> and i look to the preview it shows our background, but

    • 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

    • How do I bulk archive my projects in ZOHO projects

      Hi, I want to archive 50 Projects in one go. Can you please help me out , How can I do this? Thanks kapil

    • Copy contents of File Upload Field into Workdrive

      Hello, I have set up our CRM so that a Workdrive folder is automatically created for each Deal via workflow, this adds the id of the folder into a dedicated field. We also have a field on each Deal called 'Approved Layout', which is a file upload field.

    • Deleting a memorized email address

      How can I delete a memorized email address? Even though the address has been deleted from Contacts, Zoho mail still auto suggests the address when typing it into the TO field. Thanks!

    • 553 Relaying disallowed. Invalid Domain - gzkcompany.ro

      Hi there, Can you please assist me in getting the right domain settings? I just renewed my domain subscription, after expired and i got error: 553 Relaying disallowed. Invalid Domain - gzkcompany.ro Zoho mail can receive emails, but its impossible to

    • Not able to receive emails for a while

      I am not able to receive emails for a while now.

    • Confirmation requested: eligibility and process to downgrade to Forever Free — tenant bigbanghawking.com

      Thank you for your reply. I am testing Zoho Mail from Brazil with the tenant bigbanghawking.com (endpoint: mail.zoho.com) and we are currently on the Premium trial that expires 21/01/2026. Before deciding whether to pay or cancel, I need written confirmation

    • 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

    • Zoho API v2.0 - get ALL users from ALL projects

      Hello,        I've been trying to work on an automatization project lately and I find it difficult to work with this strict structure. To be more explicit, if i would like to get all users participating in a project i would need to get all projects first.       Same thing with projects. If i want to get all projects, I would need to get all portals first.        The problem with this aproach is that it consumes a lot of time and resources.             I want to ask if there is another way of getting

    • الموقع لا يقوم بالسداد

      السلام عليكم ورحمة الله وبركاته وبعد من أمس وانا احاول السداد للدومين YELLOWLIGHT ولا اتمكن من السداد اقوم بتعبئة جميع البيانات ولكن دون جدوى يطلع لى حدث خطأ ما

    • New in Office Integrator: Enhanced document navigation with captions and cross references

      Hi users, We're pleased to introduce captions, table of tables and figures, and cross-references in the document editor in Zoho Office Integrator. This allows you to structure documents efficiently and simplify document navigation for your readers from

    • Where Do I set 24h time format in Cliq?

      Where Do I set 24h time format? Thanks

    • 🎉 ¡Seguimos trayendo novedades a Español Zoho Community! 🎉 Confirmada la agenda y ubicación para los Workshops Certificados

      Si todavía no te has hecho con tu entrada para nuestros Workshops Certificados del próximo 26 y 27 de marzo o, por el contrario, estabas esperando que confirmáramos dónde los celebraremos, ¡este post es para ti! 📍¿Dónde nos vemos?📍 Nuestros Workshops

    • User is already present in another account error in assigning users to marketing automation

      Hello everyone Greeting, I had a problem in assigning user in marketing automation, when I try to add it I see this error: (User is already present in another account error) what should I do?

    • How do I get complete email addresses to show?

      I opened a free personal Zoho email account and am concerned that when I enter an email address in the "To", "CC", fields, it changes to a simple first name. This might work well for most people however I do need to see the actual email addresses showing

    • What's New in Zoho POS - January 2026

      Hello everyone, Welcome to Zoho POS’s monthly updates, where we share our latest feature updates, enhancements, events, and more. Let’s take a look at how January went. Sort and resolve conflicts Conflicts are issues that may arise when registers and

    • Outlook is blocking incoming mail

      Outlook is blocking all emails sent from the Zoho server. ERROR CODE :550 - 5.7.1 Unfortunately, messages from [136.143.169.51] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). It looks

    • Not receiving email from customers and suppliers

      I am getting error . most of the customers tell me not able to send me email please check i have attached screenshot

    • Next Page