Kaizen #4 - Troubleshooting OAuth2.0

Kaizen #4 - Troubleshooting OAuth2.0

Hello everyone!

Welcome back to yet another post in Kaizen! Earlier in this series, we discussed OAuth2.0 and Self Client. In continuation of that, we will now discuss the various errors that you may face while using OAuth2.0 and how you can handle them.

For better understanding, we have grouped the errors based on the OAuth2.0 flow itself.
You may face errors while
  1. Registering a client
  2. Generating the authorization code (grant token)
    a. For web-based applications
    b. For self client applications
  3. Generating access and refresh tokens from the grant token
1. Registering a Client
You can register a client in Zoho Developer Console either as a web application or a self client as displayed in the below image.

The below table explains the errors you may face while registering your client, and how you can handle them.

Error
Reason
Resolution
Enter a valid client name
The client name has a special character.
The client name must not contain any special characters except "_" and "&".
Enter a valid JavaScript Domain URI
The JavaScript domain is incorrect.
Specify valid JavaScript domains, separated by commas, and they must start with 'http'.
Enter a valid redirect URI
The redirect URI is incorrect.
Specify a valid redirect URI in the format "https://www.your-domain.com/callback".
Enter a valid homepage URL
The homepage URL is invalid.
Specify a valid homepage URL in the format "https://www.yourdomain.com".

The following images will give you an idea of these errors.



On a side note, the following are the mandatory entries for different client types. You will see an error when you do not specify any of these mandatory entries.


Client Type
Client Name
Homepage URL
Redirect URIs
JS Domains
Java Script
Y
Y
Y
Y
Web-based
Y
Y
Y
NA
Mobile
Y
Y
Y
NA
Self Client
N
N
N
NA
Device
Y
Y
N
NA

2. Generating the Authorization Code (Grant token)
As you already know, there are two ways in which you can generate the grant token based on the client type.

a. Web-based redirection
In this authorization flow,
  1. The web application redirects the user to the Zoho OAuth server with the required scope in the Accounts URL.
    "https://accounts.zoho.com/oauth/v2/auth?scope=ZohoCRM.users.ALL&client_id={client_id}&response_type=code&access_type={"offline"or"online"}&redirect_uri={redirect_uri}".
  2. As you can see, the request URL has the parameters "scope", "response_type", and "redirect_uri".
  3. The user sees the authorization prompt and approves the app's request as shown in the below image.

  4. The user is redirected back to the application with an authorization code in the query string.

  5. The application exchanges the authorization code for an access token.
The user may face one of the below errors when the application makes an authorization request with one or many incorrect parameters mentioned in step 1.

Error
Reason
Resolution
ERROR_invalid_response_type
a) The value of the "response_type" key is not "code".
b) You have not passed the mandatory keys in the request.
a) The value of the "response_type" key must be "code".
b) Pass all the mandatory keys in the request to generate the grant token.

ERROR_invalid_client
The client ID is wrong or empty.
Pass the right client ID. You can check your client ID from the developer console.
ERROR_invalid_redirect_uri
The redirect URI value passed, and the one registered in the developer console mismatches. 
Pass the right redirect URI.
ERROR_invalid_scope 
The scope is invalid.
Pass valid scopes. You can refer to the list of scopes here.


As you can see, the scope ZohoCRM.user.ALL is incorrect and hence, the system throws the error.
The application must again make the authorization request with proper scopes.

b. Self Clients
After registering your application as a self client, you must provide the necessary scopes in the UI under the Generate Code tab.
The system throws an error when you enter one or more incorrect scopes.

Enter valid scopes and click Generate to generate the code as shown below.


3. Generating Access and Refresh Tokens from the Grant Token
To generate the access and refresh tokens,
  1. Make a POST API call with the URL "{{accounts-domain}}/oauth/v2/token".
  2. In the request body, pass the values of the following parameters.
    a. client_id
    b. client_secret
    c. redirect_uri
    d. code(this is the generated grant token)
    e. grant_type
You may face errors when one or more of the above parameters have a wrong value as shown in the below image.


Error
Reason
Resolution
invalid_client
a) You have passed an invalid Client ID or secret.
b) Domain mismatch. You have registered the client and generated the grant token in a certain domain (US), but generating the tokens from a different domain (EU).
c) You have passed the wrong client secret when multi-DC is enabled.
a) Specify the correct client ID and secret.
b) Ensure that you generate the grant, access, and refresh tokens from the same domain using the same domain URL
(or)
Enable Multi-DC for your client to generate tokens from any domain.
c) Each DC holds a unique client secret. Ensure to pass the right client secret for that DC.
invalid_code
a) The grant token has expired.
b) You have already used the grant token.
c) The refresh token to generate a new access token is wrong or revoked.
a) The grant token is valid only for one minute in the redirection-based flow. Generate the access and refresh tokens before the grant token expires.
b) You can use the grant token only once.
c) Specify the correct refresh token value while refreshing an access token.
invalid_redirect_uri
The redirect URI in the request mismatches the one registered in the developer console.
Specify the correct redirect URI in the request.

Points to note

  1. For redirection-based authorization, the grant token is valid only for a minute.
  2. For self client apps, the grant token is valid for the time you selected while authorizing your application.
  3. If the generation of access and refresh tokens from the grant token fails, the grant token becomes invalidated. You must generate another grant token.
  4. You can generate a grant token only up to five times in a minute.
  5. The access token is valid only for an hour. You must use the refresh token to generate new access tokens.
  6. The refresh token does not expire. It is invalidated only when you revoke the refresh token.
  7. Each user in an organization can have a maximum of 20 refresh tokens. Also, each refresh token can have a maximum of 30 active access tokens.
  8. When a user creates the 31st access token, the system deletes the first created access token. Similarly, when the user creates the 21st refresh token, the system deletes the first created refresh token.

We hope you found this post useful. Keep a tab on this series for more exciting topics!

Reach out to us at support@zohocrm.com if you have any questions, or let us know in the comment section.


Cheers!



      Zoho Campaigns Resources


        • Desk Community Learning Series


        • Digest


        • Functions


        • Meetups


        • Kbase


        • Resources


        • Glossary


        • Desk Marketplace


        • MVP Corner


        • Word of the Day


        • Ask the Experts


          • Sticky Posts

          • 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.
          • Kaizen #210 - Answering your Questions | Event Management System using ZDK CLI

            Hello Everyone, Welcome back to yet another post in the Kaizen Series! As you already may know, for the Kaizen #200 milestone, we asked for your feedback and many of you suggested topics for us to discuss. We have been writing on these topics over the

          Zoho CRM Plus Resources

            Zoho Books Resources


              Zoho Subscriptions Resources

                Zoho Projects Resources


                  Zoho Sprints Resources


                    Zoho Orchestly Resources


                      Zoho Creator Resources


                        Zoho WorkDrive Resources



                          Zoho CRM Resources

                          • CRM Community Learning Series

                            CRM Community Learning Series


                          • Tips

                            Tips

                          • Functions

                            Functions

                          • Meetups

                            Meetups

                          • Kbase

                            Kbase

                          • Resources

                            Resources

                          • Digest

                            Digest

                          • CRM Marketplace

                            CRM Marketplace

                          • MVP Corner

                            MVP Corner




                            Zoho Writer Writer

                            Get Started. Write Away!

                            Writer is a powerful online word processor, designed for collaborative work.

                              Zoho CRM コンテンツ



                                ご検討中の方

                                  • Recent Topics

                                  • [Free Webinar] Product Updates: Quick Catch-Up Session - Part II - Creator Tech Connect

                                    Hello Everyone! We welcome you all to the upcoming free webinar on the Creator Tech Connect Series. The Creator Tech Connect series is a free monthly webinar featuring deep-dive technical sessions designed for developers, administrators, and app builders.
                                  • Introducing Liquid Glass UI on the Zoho Mail iOS app

                                    Hello everyone! We're excited to announce that the Zoho Mail app is now fully optimised for iOS 26's Liquid Glass design on both iPhone and iPad! The updated interface features transparent layers, smooth animations, and refined visual elements that enhance
                                  • Plan change from Zoho One to Zoho Workplace

                                    Hello Zoho, Following the recent pricing update for Zoho One, we are interested in transitioning to Zoho Workplace products. Please inform us about the necessary steps for this process so we can proceed promptly. Kind regards,
                                  • Partner with HDFC And Sbi Bank.

                                    Hdfc and sbi both are very popular bank if zoho books become partner with this banks then many of the zoho books users will benefit premium features of partnered banks.
                                  • Links in Instagram

                                    Hi there, I have been using Later for a while now but keen to come back to Zoho Social as Later doesn't offer tagging of pages on Facebook but they offer something Zoho doesn't. You can add a link to your bio which opens up your profile feed where images
                                  • Spotlight #7 - Automatic Transitions in Blueprint

                                    Previously, records could not be moved from one state to another without user intervention. With automatic transitions, move records from one state to another automatically, when it elapses its pre-defined time. This Spotlight discusses how automatic
                                  • Sub Folders

                                    It would be great if there could be sub-folders in reports. We have a ton of individual reports and folders that would be easier to navigate this way 
                                  • Zoho CRM Community Digest - November 2025 | Part 2

                                    Hello Everyone! Second half of November brought several exciting updates, especially around Zia, making AI assistance smarter, faster, and more context-aware. We also feature engaging community snippets highlighting members who went the extra mile to
                                  • Zoho CRM - Writing Assistant Tone

                                    Hi Zoho CRM Team, Text in my emails often gets underlined in yellow because I tend to use a more informal tone with my client's, like using "I'm" instead of "I am". Is there some way for me to tell the system that this is my preferred writing tone, so
                                  • Hide Contact Number for Field Users & Agents

                                    Is it possible to hide the contact number in both the Service Appointment and Work Order modules for field users and agents? The agents are using the Zoho FSM mobile app, and we want to restrict them from viewing the contact number.
                                  • 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
                                  • Form Submission Emails

                                    Is there a current delay with submission emails being sent? We've had 10-20 forms completed today but only a handful of emails.
                                  • How to update Multi File upload field

                                    Assume that i have a multi file upload field,how can i update the same field again?
                                  • What is the simplest way to import PST to Yahoo Mail?

                                    The simplest way to import PST file into Yahoo Mail is to use a third-party tool that supports direct PST-to-Yahoo migration. Software like Aryson PST Converter lets you upload emails, contacts, attachments, and folders from a PST file straight into your
                                  • Subform edits don't appear in parent record timeline?

                                    Is it possible to have subform edits (like add row/delete row) appear in the Timeline for parent records? A user can edit a record, only edit the subform, and it doesn't appear in the timeline. Is there a workaround or way that we can show when a user
                                  • 【Zoho CRM for Everyone】設定画面のアップデート

                                    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。 今回は「Zoho CRM アップデート情報」の中から、Zoho CRM for Everyone の設定画面のアップデート情報をご紹介します。 目次 設定ホーム画面の追加 設定画面での検索結果の表示形式の変更 設定画面でのよく使用する機能の表示 設定メニューの展開/折りたたみ状態の保持 1. 設定ホーム画面の追加 ホーム画面の設定項目は、直感的に分類できるように"カテゴリごと"で分けられています。 このような一元化された表示により、各ツールが1つの画面に集約され、必要な機能をより簡単に見つけられるようになりました。
                                  • What's New - November 2025 | Zoho Backstage

                                    A new month, a new set of updates. With a mix of new features and thoughtful improvements, you get smoother workflows and better control across registrations, exhibitors, and communications. Let's take a look at what's new and enhanced in Zoho Backstage
                                  • Zoho Checkout - Duplicate Customer record created for each payment received

                                    Hi All. We are using Zoho Checkout to capture online payments for a club membership form (in Zoho Forms). We've noticed that each new payment seems to create a new customer record, regardless of whether the customer already exists in the Zoho Finance
                                  • Zoho public comments are confusing and unnecessary

                                    Hi, we use zoho desk and have issues with public comments. We started using them because the "Reply" option just seemed very clumsy because of the following reasons: - the top "Reply" button starts what seems to be a regular email, showing the entire
                                  • Templates for Zoho Desk - Knowledge Base

                                    We are looking at migrating our Knowledge base into Zoho Desk. Is there a way of creating templates for article in Knowledge base. We want to be able to set templates for certain types of content. Is this possible
                                  • Import KB template OR Export template for zoho desk?

                                    Greetings. Can you tell me if there is a way to get an EXPORT of my KB articles? OR is there a template you supply for importing KB articles into my zoho desk? I am looking for a method of understanding what fields can be imported, and what their possible
                                  • What KPIs Do You Use to Measure Your Support Team’s Performance in Zoho Desk?

                                    Hi everyone, We hope you’re all doing well. We are trying to improve how we measure the performance and effectiveness of our support department, and we would really appreciate learning from the community. We assume there are several common and widely-used
                                  • Backorder quantity change

                                    New Purchase Order × Almost there, but... Quantity of items in this purchase order is greater than the quantity that can be backordered from that sales order. Why can't I change the quantity of a backorder purchase? It looks like a normal order form and I would like to use it as one because I increased the amount and added some items. 
                                  • How to Associate multiple contacts with deal in Sales Inbox

                                    Hello, I have many deals that have multiple potential customers associated with a single deal, for example an engineer and a manager. The manager is the Deal's primary contact in CRM and the Engineer is added to the deal in the "Contact Roles" Associated
                                  • Adding Taxes to paid consultations in Zoho Bookings

                                    I created a 'paid' consultation under Zoho Booking and integrated it with payment gateways for online/instant payment before a booking is done. How can I add 'taxes' to the price of consultation? I can add taxes to other Zoho apps (liks Books, Checkout,
                                  • WorkDrive and CRM not in sync

                                    1/ There is a CRM file upload field with WorkDrive file set as the source: 2/ Then the file is renamed in WorkDrive (outside CRM): 3/ The File in CRM is not synced after the change in WorkDrive; the file name (reference) in CRM record is not updated (here
                                  • "code": "500","description": "Account not exists", mail api

                                    I have been through all the steps and have a functioning Oath access_token etc etc... I then GET https://mail.zoho.com/api/organization And get my zoid then GET http://mail.zoho.com/api/organization/<hidden>/accounts and get the account details, which
                                  • RTL Support for Webforms in Zoho CRM

                                    Dear Zoho CRM Support Team, We are writing to request an enhancement to the webform builder functionality within Zoho CRM. Currently, to create a webform in a right-to-left (RTL) language, the entire CRM instance must be set to RTL, which can be inconvenient
                                  • Imported contacts succesful but contacts do not show up in Contacts

                                    I imported +300 contacts. I can see them in import history. When clicking on a contact in import history I see all the imported contact details for any given contact. So import seems to be successful.   However the imported contacts do not show up in the contacts tab. Not in All contacts, and not in a filtered view where they absolutely should show up. The search function also does not find any imported contact.   Help?
                                  • Update on V2 API End-of-Life Timeline

                                    Dear Users, Earlier this year, we shared the launch of the V3 APIs and requested users to migrate from the older V2 APIs by December 2025. We have received valuable feedback from our users and partners regarding their migration timelines. We are happy
                                  • Rich Text For Notes in Zoho CRM

                                    Hello everyone, As you know, notes are essential for recording information and ensuring smooth communication across your records. With our latest update, you can now use Rich Text formatting to organize and structure your notes more efficiently. By using
                                  • Saving sent email campaign as PDF

                                    I'm looking to add all campaigns sent to an archive folder in sharepoint. Is there anyway to accomplish this in Zoho Flow ? I'm falling at the first hurdle ... can I automatically save a sent campaign as a PDF to a folder location ?
                                  • Zoho Voice lance BYOC (Bring Your Own Carrier) : intégrez votre opérateur

                                    Pour accompagner sa croissance, une entreprise a besoin d’une infrastructure téléphonique flexible et évolutive. Les solutions de téléphonie s’adaptent aux exigences du centre de contact, tout en intégrant aisément les opérateurs locaux de votre choix.
                                  • Digest Novembre - Un résumé de ce qui s'est passé le mois dernier sur Community

                                    Bonjour chers utilisateurs, Avec l'arrivée du dernier mois de l'année, il est temps de résumer les activités de novembre dans la communauté Zoho France. Ce mois-ci, Zoho Webinar se dote de deux nouvelles intégrations ! La première est avec Zapier : connectez
                                  • How do I create an update to the Cost Price from landed costs?

                                    Hi fellow Zoho Inventory battlers, I am new to Zoho inventory and was completely baffled to find that the cost price of products does not update when a new purchase order is received. The cost price is just made up numbers I start with when the product
                                  • Export Invoices to XML file

                                    Namaste! ZOHO suite of Apps is awesome and we as Partner, would like to use and implement the app´s from the Financial suite like ZOHO Invoice, but, in Portugal, we can only use certified Invoice Software and for this reason, we need to develop/customize on top of ZOHO Invoice to create an XML file with specific information and after this, go to the government and certified the software. As soon as we have for example, ZOHO CRM integrated with ZOHO Invoice up and running, our business opportunities
                                  • E-Invoicing in Belgium with Zoho Books

                                    Starting January 1, 2026, Belgium is introducing mandatory electronic invoices (e-invoicing) for all B2B transactions between VAT-registered businesses. This means that invoices and credits notes must be exchanged in a prescribed digital format. How E-Invoicing
                                  • 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
                                  • Announcing new features in Trident for Mac (1.30.0)

                                    Hello everyone! We’re excited to introduce the latest updates to Trident, bringing you a more seamless, intuitive, and secure communication experience. Let’s take a quick look at what’s new. Work with PST/EML files more efficiently. You can now do more
                                  • Open Form in Same window as Page from embedded Report

                                    I have a page that has an embedded report, as shown below. When I click the + sign to add a new record, the form shows up inside the page where the report was embedded. I know that I can add a custom action to the report grid or report detail view and
                                  • Next Page