Deprecation of C4 endpoint URLs
Note: This post is only for users who are still using the C4 endpoints.
Hello everyone,
At Zoho Creator, we're committed to continuously enhancing the security, performance, and capabilities of our platform. As part of this ongoing effort, we'll be deprecating older C4 endpoint URLs in the next few months. This transition is critical for security, as the old endpoints rely on outdated libraries, leaving it potentially vulnerable to security issues. We believe this update is a crucial step towards making the platform more secure and unified. With this post we aim to guide you through the migration process.
What are C4 endpoint URLs?
These are a legacy URL pattern that were a part of the C4 version of Zoho Creator and could be used to access data via APIs. Essentially, the C4 endpoints are the one that contains a .do action (such as restapiaction.do, getApps.do and so on).
If you built custom workflows several years ago, they might still be using these URLs. With the launch of our C5 version and REST APIs, we transitioned to a more standardized URL format. However, we continued to support requests made in the older format to prevent service disruptions.
What is changing?
We're phasing out all C4 endpoint URLs in favor of new standardized URL formats which have been in place since 2018. Going forward, all API requests, such as adding, updating, or deleting records, must be performed using the format as per our v2.1 REST APIs.
Use the table below to find examples of new endpoints that corresponds to the legacy C4 endpoint URLs. Please note that all URLs that end with .do in them needs to be replaced.
Action | C4 format | New format |
Add Record from Web Client | /addRecordValidate.do | https://creatorapp.zohopublic.<DC>/<ScopeName>/<AppLinkName>/form/<FormLinkName>/clientadd/<PublishKey> |
/getApps.do | https://www.zohoapis.com/creator/v2.1/meta/applications | |
/getallapps.do | https://www.zohoapis.com/creator/v2.1/meta/applications | |
/getformmeta.do | https://www.zoho.com/creator/help/api/v2.1/get-fields.html | |
/restapiaction.do | https://www.zohoapis.com/creator/v2.1/data/<ScopeName>/<AppLinkName>/form/<FormLinkName> -X POST | |
/restapiaction.do | https://www.zohoapis.com/creator/v2.1/data/<ScopeName>/<AppLinkName>/report/<ReportLinkName> -X PATCH | |
/restapiaction.do | https://www.zohoapis.com/creator/v2.1/data/<ScopeName>/<AppLinkName>/report/<ReportLinkName> -X DELETE | |
/postrequestadd.do | https://www.zohoapis.com/creator/v2.1/data/<ScopeName>/<AppLinkName>/form/<FormLinkName> -X POST | |
/showXml.do | https://www.zohoapis.com/creator/v2.1/data/<ScopeName>/<AppLinkName>/report/<ReportLinkName> -X GET |
What should you do?
To prevent any disruption to your applications, you'll need to update your scripts that use these old C4 endpoint URLs.
Your action plan should be:
- Identify: Review your existing workflows and third-party services for any code that calls C4 endpoints.
- Update: Make necessary changes to your scripts to make sure they align with the new standardized format.
- Test: Thoroughly test your updated scripts to ensure they function as expected.
When does this take effect?
We plan to fully deprecate C4 endpoints starting November 28, 2025. Please note that, after this date, any API call made to a C4 endpoint will fail.
We request your utmost attention to this matter and encourage you to make the necessary changes before the deadline to avoid any disruption to your workflows.
We're confident these changes will improve the security and performance of your integrations. We look forward to your cooperation in ensuring a smooth and successful migration.
If you need any assistance or have questions, please feel free to reach out to us; we're always here to help.
Regards,
The Zoho Creator team
The Zoho Creator team
Access your files securely from anywhere
New to Zoho Recruit?
Zoho Developer Community
New to Zoho LandingPage?
Zoho LandingPage Resources
New to Zoho Survey?
New to Zoho CRM Plus?
Deliver unforgettable customer experiences
New to Zoho CRM Plus?
Deliver unforgettable customer experiences
New to Zoho Marketing Plus?
Everything you need to run your marketing
New to Zoho Marketing Plus?
Everything you need to run your marketing
New to Bigin?
Topic Participants
Ashwin Vishal R
Sticky Posts
Introducing Zoho Creator's 2025 Release Projection 2
Hello Creators! I'm Prakash, from the Creator product management team, and today I'm delighted to unveil our next set of features as part of Release Projection 2 for 2025. With thoughtful analysis and planning, we've curated powerful new capabilitiesZoho Creator - 2023 Release Projection 1
Hello everyone! A very Happy New Year to you and your family. Hope you're all good and having a great time using Zoho Creator to make your lives easier and your businesses prosper. 2022 was an action-packed year for us at Creator, and we hope to continueZoho Creator User Group meetups in a city near you! - Oct - Nov, 2023
Greetings from the Zoho Creator team! We're hosting a series of Zoho Creator meetups in various cities across the globe, and we'd love to meet you there! Our meetups are a great opportunity to network with industry peers, exchange ideas and best practices,Zoho Creator - 2023 Release Projection 2
Hello everyone! Time truly flies when you're having an incredible journey, and today we mark the completion of an eventful and action-packed six months. It feels like just yesterday when we embarked on this adventure together with the launch of our newUpcoming Updates - August 2022
Hi all, Greetings from the Zoho Creator team! Today we've got news for you on some exciting updates. And rest assured— there’s more to come! In this post, we'll be going over the upcoming features and improvements for this month as mentioned below. A
New to Zoho TeamInbox?
Zoho TeamInbox Resources
Zoho CRM Plus Resources
Zoho Books Resources
Zoho Subscriptions Resources
Zoho Projects Resources
Zoho Sprints Resources
Qntrl Resources
Zoho Creator Resources
Zoho CRM Resources
Design. Discuss. Deliver.
Zoho Show Resources
Get Started. Write Away!
Writer is a powerful online word processor, designed for collaborative work.
Zoho CRM コンテンツ
-
オンラインヘルプ
-
Webセミナー
-
機能活用動画
-
よくある質問
-
Ebook
-
-
Zoho Campaigns
- Zoho サービスのWebセミナー
その他のサービス コンテンツ
Nederlandse Hulpbronnen
ご検討中の方
Recent Topics
Forwarder
Hi, I tried to add a forwarder from which emails are sent to my main zoho account email . However, it asks me for a code that should be received at the forwarder email, which is still not activated to send to my zoho emial account. So how can I get theDKIM cannot be enabled for the domain as no verified default selector present
Hi Support Team, For Domain DKIM record trying to enable status. but showing error "DKIM cannot be enabled for the domain as no verified default selector present" So, please resolve the issue. Thank you.I can't log in to my account on Thunderbird
I've just had to rebuild my PC (calamitous mess from Microsoft with Win10/Win 11 'upgrade' - they confirmed I had to start with a new build). I have used Zoho mail for years via Mozilla Thunderbird, but now I've had to download the latest version of TBird,Sorten the domain of zoho mail ids
I recently created zoho mail id and am quite excited with the features. But one issue ig nobody wanna type this big zohoaccounts.com I mean silly bold Suggestion zmail.com (sound gmail) (attraction) or some genz words looks coolWeekly Tips : Customize your Zoho Mail Notifications
In a professional context, email communication remains one of the most crucial channels for staying connected and managing workflows. Keeping track of your emails, task updates, or important announcements can be overwhelming—especially if you are jugglingHow to move emails to Shared Mailbox?
Hello, I created a Shred Mailbox instead of using a distribution group. But I cannot move previous emails to certain shared mailbox. Is it possible move some emails from inbox to shared mailbox?Email task creator when task is updated/marked complete
I am looking for a way to notify the creator of a task in zoho todo when - Task is updated Task is closed Comments entered 1 and 2 are critical, and I cannot find a zoho flow to do this. There is no way that as a manager I will know when someone has completedThe attendees will now be redirected to the landing webpage when they exit the webinar, set by the organizer.
Hello All, In the latest version of the Zoho Meeting iOS mobile app (v1.3.16), we have brought in the below enhancements: Post Webinar Re-direction Revamped exit UI for Webinar Post Webinar Re-direction: The attendees will now be redirected to theDownload API file contents from browser
Hi Team - is there something being planned to be able to trigger file downloads from the browser via a deluge script? i.e. retrieve a file via API, trigger the file download directly from the browser. Or... using the convertToPdf function (https://www.zoho.com/deluge/help/functions/file/convert-to-pdf.html)March 15, 2023: Zoho Docs is discontinued
As of today (March 15, 2023) Zoho Docs is discontinued for all users. We would like to thank our customers for trusting us for so many years! Going forward, we're confident you'll enjoy using Zoho WorkDrive for all your advanced file management and collaborationWhen using "locations" in zoho books, can you keep the two locations totally separate from each other?
I am looking to add a location but I don't want to intermingle the banking or other accounts. I want that to be like two separate independent branches that use different banking accounts, accounts payable, and accounts receivable. The people who are inAdding a Channel to SalesIQ
I have a client that currently uses Zoho CRM and Zoho Desk. They would like a live chat to place on their website that has a mobile app and chat bots (something like SalesIQ). However, they would also like to have all this work over SMS as well. Does the SalesIQ API allow this? Can I add visitors without them being a visitor on a website? Thanks! Bryan RedeagleDataPrep Bigquery Connection failed
Hello everybody, I want to create a connnection beetwen Bigquery and Dataprep but when I try to connect my project I got this error Loading tables has failed. Table list fetched from the data source expired.How Do I Refund a Customer Directly to Their Credit Card?
Hi, I use books to auto-charge my customers credit card. But when I create a credit note there doesn't seem to be a way to directly refund the amount back to their credit card. Is the only way to refund a credit note by doing it "offline" - or manually-Zoho Flow Needs to Embrace AI Agent Protocols to Stay Competitive
Zoho Flow has long been a reliable platform for automating workflows and integrating various applications. However, in the rapidly evolving landscape of AI-driven automation, it risks falling behind competitors like n8n, which are pioneering advancementsImportant Features Missing
Hey all I love linkthread, but i am missing some important features. I want to be able to include my Google Tag Manager. I have all the important stuff in my GTM Container: Facebook Pixel, LinkIn Pixel, Zoho Pagesense and so on. So i am able to do retargetingZoho SignForms: Prefill parameters with spaces render as “+” in the document (even when using %20)
Hello Zoho Sign team, we are using SignForms with prefill parameters passed via URL. Spaces in parameter values are being rendered as “+” in the finalized document—even when we URL-encode spaces as %20. This is critical for us because we prefill addressesCurrency selector (based on variable) usage in comparsion
Hi, I've developed a currency selector based on the following topic, and it's working well in pivot tables and charts: https://help.zoho.com/portal/en/community/topic/how-can-i-allow-my-users-to-choose-a-currency-for-the-dashboard I also have a comparisonCustomize Column in Projects - Default View for Template?
Is there a way to have the columns you'd like to see added to a template? I want my customized columns to show up every single time I create a project from that template. It appears I can customize them in the template but when I create the project they do not transfer over. Template: See below how the columns in order are : Task, Owner, Status, Assigned, Website URL, Blog H1..etc. When I create a project from that same template it comes out as: Task, Owner, Status, Tags, Start Date, End Date, etcAsk the Experts 24: Analytics, data administration, and mobile experience with Zoho Desk
Hello Everyone! Welcome back to the Ask the Experts(ATE) series! We were so focused on our Autumn 2025 release that we didn't host an ATE session last month. In this month's ATE, we'd like to expand our areas for discussion: we'd like to listen to yourMulti-Page Forms in Zoho Creator!
Let’s make long applications easier to handle by dividing them into pages, adding a progress bar, and guiding users step by step through complex data entry. This would be a total game-changer for the user experience and could significantly boost completionEmail login error
Login successfully but email page errorShared Mailboxes Disappeared
Zoho Mail users in our company haven't been able to see their Shared Mailboxes for the past few hours. I've checked with App and Web Access, but they can't access them. When I send emails to their addresses, I get no error messages. They're still visibleRemote Server is misconfigured
Dear Team, I am unable to use email id as remote server is misconfigured. It would be really great if you could help on this and get this resolved. Thanks & Regard Rohit Guptawhy cant i access my email account. it keeps asking me for reverifiying my account by entering my password.
I cant access my account. it keeps asking me for reverifcaton by entering my password. once its entered it asks for it over and over.Free webinar alert on October 16 - Less Complexity, More Security: Workplace + Directory
Hello Zoho Workplace Community! Security and productivity shouldn't be at odds—and with Zoho, they're not. Discover how Zoho Workplace + Directory delivers seamless collaboration with enterprise-grade security, all in one integrated ecosystem. Join ourEmail Recall Feature In Zoho Mail Which Should Also Work For Outside Organisation Members
Add a feature to recall or undo sending an email within a configurable short time window (e.g., 30 seconds to 2 minutes) after hitting send, similar to Gmail’s undo send. Currently the sent email can not be recall If the recipient is not from within yourWorkdrive and ChatGPT Team Synced Connectors
Hi, we want to be able to integrate Zoho Workdrive with OpenAI’s ChatGPT Team plan. Google Drive and OneDrive both offer this, zoho please catch up asap. We dont want to have to put our company files in google drive, we want to allow chatgpt Team editionAlias Name (on items) use case in Zoho inventory
Hey, Hope everyone is well. Wondering if anyone can shed some light on the use case of Alias Names on Products in Zoho Inventory? Cheers, ChrisUpdating an Invoice Line Item's Discount Account via API Call / Deluge Custom Function
I need help updating an invoice line item's discount account via API. Below is a screenshot of the line item field I am referring to. Now the field to the left of the highlighted field (discount account) is the sales income account. I am able to modifySend e-mail with attachments
Dear Zoho, How is that possible in Zoho Flow to send an e-mail with attachment? Just a simple example: Zoho Flow checks my Zoho mails and if the conditions starts the trigger then I would like to send an email with the original email's attachment. Any idea? BR, AdamHow to I get checkboxes on a subform to update via deluge
Hello, would someone be able to tell me what I'm doing wrong here? I am trying to take the contents of a Deals subform and add them to an invoice then update the checkbox on each row so that 'add to invoice' is unticked and 'invoiced' is ticked. The outputYour bot just got smarter: AI-Powered routing that reads between the lines
What if your bot could tell the difference? Between a visitor who just needs a quick answer, someone actively comparing options, and a frustrated customer one click away from leaving? Most bots can't. They deliver the same response to everyone, missingUrgent Security Feature Request – Add MFA to Zoho Projects Client Portal Hello Zoho Projects Team,
Hello Zoho Projects Team, We hope you are doing well. We would like to submit an urgent security enhancement request regarding the Zoho Projects Client Portal. At this time, as far as we are aware, there is no Multi-Factor Authentication (MFA) availableUnified customer portal login
As I'm a Zoho One subscriber I can provide my customers with portal access to many of the Zoho apps. However, the customer must have a separate login for each app, which may be difficult for them to manage and frustrating as all they understand is thatZoho Projects - Task Owner filter at Project level
Hi Projects Team, The feature requests I would like to raise is the ability to create a custom view at the project level for projects with tasks owned by a user or users. For example "Ashley's Projects" custom view might contain a list of project in whichCadences
I have just started using Cadences for follow-up up email pipeline. Is it just me or do you find the functionality very basic? For example, it will tell me (if I go looking for it) if someone has replied to a follow-up and been unenrolled; but it won'tZoho Books-Accounting on the Go Series!
Dear users, Continuing in the spirit of our 'Function Fridays' series, where we've been sharing custom function scripts to automate your back office operations, we're thrilled to introduce our latest initiative – the 'Zoho Books-Accounting on the Go Series'.Custom Fonts in Zoho CRM Template Builder
Hi, I am currently creating a new template for our quotes using the Zoho CRM template builder. However, I noticed that there is no option to add custom fonts to the template builder. It would greatly enhance the flexibility and branding capabilities ifWould be really awesome to have Created Time and Modified Time showing for custom functions list
It would be SO HELPFUL to be able to sort custom functions by created time/ modified time. Also seeing a created by/ modified by with the little profile picture would be supremely helpful as well. Just really hard sometimes to find a function you wereNext Page