Calling Token API in Postman returning "error: invalid_client"

Hello,

I've been working on setting up an API to get data from zoho crm into a third-party application. I'm currently testing the setup in Postman, but I'm getting an error from the API to retrieve the access token. 

It keeps returning "error: invalid_client". I'm hard pressed on what the issue is since I copied the client ID directly from the Self Client application in the API console. 

Here's the API call:

I'm doing a post call to retrieve the access token from the API. As in the documentation I'm sending the grant_type, client_id, client_secret, redirect_uri, and code within the request body as form-data.

Does anybody know what's causing this issue?

Thank you,

Aaron.

• Topic Participants

• Aaron

• Anamika Prasanth

  

• Waldo Nortje

• Todd Hardin

• Shiffoni Syal

• 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 Desk - Description of slave ticket disappeared after Merge

  Dear Support, On Zoho Desk the description of a ticket disappeared after merging two ticket. The one which was the slave one completely disappeared. The problem that in this description there was an image which i had only on Desk in that ticket. Could

• How do I insert a cross-reference link to a different section within one Knowledge Base article using Zoho Desk?

  I would like to insert a link within a Knowledge Base article to a different section of that same article. The section I want to link to is formatted with the Heading 3 style and is displayed within my TOC. However, I do not see any way to add a link

• Problem Adding Facebook Account

  Hi, I'm new here, I'm having trouble setting up my Facebook account as a social channel. I think the issue is down to how my Facebook is set up, which is pretty confusing. I have a personal Facebook account (let’s called it A) which is my main Facebook

• Zoho Desk Teams App is not loading

  Hi Zoho Desk support. Need an assistance on the Zoho Desk Teams app. Once I click View Ticket, it isn't showing anything. Kindly refer to attached: ZohoDesk Teams App_View Ticket Error.jpg For our Dashboard, we are still experiencing the same issue. Kindly

• Zoho People - Retrieve the Leave Details - get("LeaveCount")

  Hi, Zoho People I need to collect all of an employee's leave requests for the calendar year and check how many half-days they have taken. If I run the script on the query he just modified, I can retrieve the information related to that query and use the

• Mapping a new Ticket in Zoho Desk to an Account or Deal in Zoho CRM manually

  Is there any way for me to map an existing ticket in Zoho desk to an account or Deal within Zoho CRM? Sometimes people use different email to put in a ticket than the one that we have in the CRM, but it's still the same person. We would like to be able

• Which WhatsApp API works seamlessly with Zoho CRM?

  I’m exploring WhatsApp API solutions that integrate seamlessly with Zoho CRM for customer communication, lead nurturing, and automation. I would love to hear insights from those who have successfully implemented WhatsApp within Zoho CRM. My Requirements:

• Allow people to sign a zoho form by using esign or scanned signature

  Allow people to sign a zoho form by using esign or scanned signature

• Button to Reapply Filters on Sheet(s)

  I wrote a macro that I attached to a button to reapply the filters on all my sheets and it says it works, but it doesn't actually do anything. What is wrong with it? Is there another way? Or even make it work for one sheet? Sub UniversalFilterRefresh()

• Integrate Multiple ZohoBooks organization with zoho projects

  We have successfully connected our Zoho Books with Zoho Projects for synronizing timesheet data. Our Business specialty is, that the staff of the Main company (A) is working on several projects, but the Clients are sometimes contracted and paying to a

• Zoho OAuth Connector Deprecation and Its Impact on Zoho Desk

  Hello everyone, Zoho believes in continuously refining its integrations to uphold the highest standards of security, reliability, and compliance. As part of this ongoing improvement, the Zoho OAuth default connector will be deprecated for all Zoho services

• Unable to Assign Multiple Categories to a Single Product in Zoho Commerce

  Hello Zoho Commerce Support Team, I am facing an issue while assigning categories to products in Zoho Commerce. I want to assign multiple categories to a single product, but in the Item edit page, the Category field allows selecting only one category

• How do I add todays date to merge field

  I don't see any selection of todays date when creating a letter. Surely the date option of printing is standard? John

• Tracking Emails sent through Outlook

  All of our sales team have their Outlook 365 accounts setup with IMAP integration. We're trying to track their email activity that occurs outside the CRM. I can see the email exchanges between the sales people and the clients in the contact module. But

• Whats that

  Price?

• The same Contact associated to multiple Companies - Deals

  Hi, I would like to know if there is an option to associate the same contact with multiple companies (two or more) deals, using the same contact details for all. This is because we have contacts who are linked to different companies or branches of the

• Portals-Adjust Column Sizes

  I am trying to adjust the column widths in Portals tabs. Columns that don't need to be wide are wide and longer ones are very short. I thought adding more to the digits box in Edit would widen them, but it doesn't. Anyone know how to adjust these?

• Add link/button to open approved record from approval list and detail views?

  Hi, How do I allow users to click on an approval record and open that submission? For example, userA submits a quotation then userB approves/rejects. They both can see the quotation on "completed task" list & detail views, but there's no way for them

• record submitted from creator and invoice is creating in books , but the workflow of books is not tiggering on create of record in books

  record submitted from creator and invoice is creating in books , but the workflow of books is not tiggering on create of record in books headermap = Map(); headermap.put("X-ZOHO-Execute-CustomFunction","true"); response_inv = invokeurl [ url :"https://www.zohoapis.com/books/v3/invoices/fromsalesorder?salesorder_id="

• Prevent editing of a record after getting approved/rejectedr

  Hi, I'd like to block any user from editing a record after it was approved or rejected, how can I do that?

• Formula Field/Campo de Fórmula

  Hello everyone, I have a purchase requisition form in which each department submits a request, and the request is automatically routed to the person responsible for that department. In this form, I have several fields with the following link names: Quantidade1,

• Formatting Problem | Export to Zoho Sheet View

  When I export data to Zoho Sheet View, ID columns are automatically formatted as scientific notation. Reformatting them to text changes the actual ID values. For example, 6557000335603071 becomes 6557000335603070. I have attached screenshots showing this

• Feature Request - The Ability to Link A Customer with a Vendor

  Hi Finance Suite Team, Many businesses buy and sell products from the same companies or individuals. For example, a car sales business may buy a car from a member of the public, and that member of the public may also buy a new car from us. This makes

• Long table name (sync from Zoho Creator)

  Dears, How can I remove the suffix in parentheses? These tables are synced from Zoho Creator and are treated as system tables, so their names cannot be changed. This issue makes the aggregation formulas look awful.

• [Free Webinar] Learning Table Series - Streamlining incident management process with Zoho Creator

  Hello everyone, We’re excited to invite you to another edition of the Learning Table Series webinar. As you may already know, we've moved to a purpose-based approach in the Learning Table Series this year. Each session now focuses on how a Zoho Creator

• Unattended - Silent

  How can I hide the tray icon / pop up window during unattended remote access for silent unattended remote access?

• Importing into Multiselect Picklist

  Hi, We just completed a trade show and one of the bits of information we collect is tool style. The application supplied by the show set this up as individual questions. For example, if the customer used Thick Turret and Trumpf style but not Thin Turret,

• Text snippet

  There is a nice feature in Zoho Desk called Text Snippet. It allows you to insert a bit of text anywhere in a reply that you are typing. That would be nice to have that option in Zoho CRM as well when we compose an email. Moderation Update: We agree that

• Marketing Tip #18: Make your online store mobile-friendly to improve traffic

  Most online shoppers browse on their phones first. If your store is hard to read, slow to load, or tricky to navigate on mobile, they’ll bounce fast. A mobile-friendly store doesn’t just look nice; it improves engagement, reduces drop-offs, and helps

• [Need help] Form closed. Please contact your form administrator for further assistance.

  https://forms.zohopublic.com/cceinfoifly1/form/CCE2025CCEFocusGroupRegistrationForm2025Fall/formperma/s_8XcLETTbFxZ_TAS4r_W6W5UBl8o5oxEnIX35IBKg4 I checked we didn't exceed the usage limit and form availability is enabled, Please help us enable this form

• Zoho People. Updating TabularData

  I am trying to update tabular data in the record. I always have the same response. I have checked many times. Section ID is correct. May be something wrong with request structure itself. Can someone help me. Body content type: form urlencoded query params

• Automatically CC an address using Zoho CRM Email Templates

  Hi all - have searched but can't see a definitive answer. We have built multiple email templates in CRM. Every time we send this we want it to CC a particular address (the same address for every email sent) so that it populates the reply back into our

• Unable to Send Different Email Templates for Different Documents in Zoho Sign

  Hello Zoho Community, I am facing a limitation with Zoho Sign regarding email notifications sent to customers when a document is sent for signing. Currently, whenever I send any template/document for signing, the email notification that goes to the customer

• Reminder needs 0 minute choice

  I most use 0 minute reminders.  Every other calender service has this choice.  If I create an event in my Android calendar with 0 minute reminder it will change to 5 minute.  Please ad 0 as a reminder choice, this should be a 5 minute fix.  Thanks.

• Customer ticket creation via Microsoft Teams

  Hi all, I'm looking to see if someone could point me in the right direction. I'd love to make it so my customers/ end users can make tickets, see responses and respond within microsoft teams. As Admin and an Agent i've installed the zoho assist app within

• 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

• How to update task start date when project start date changes?

  Hi there, When the start date of a project changes, it's important to update the start dates of the tasks associated with that project to reflect the new timeline. Is there a way to shift the start date of all project tasks when the start date of a project

• Issue with Picklist Dropdown Not Opening on Mobile

  Hello I am experiencing an issue with picklist values on mobile. While the arrow is visible, the dropdown to scroll through the available values often does not open. This issue occurs sporadically, it has worked occasionally, but it is very rare and quite

• using the client script based on the look up filed i wnat to fetch the record details like service number , service rate

  based on selected service look up field iwant to fetch the service serial number in the serice form how i achive using client script also how i get the current date in the date field in the on load of the form

• Zoho Books/Square integration, using 2 Square 'locations' with new Books 'locations'?

  Hello! I saw some old threads about this but wasn't sure if there were any updates. Is there a way to integrate the Square locations feature with the Books locations feature? As in, transactions from separate Books locations go to separate Square locations

• Next Page