Kaizen #122 - Data Synchronization using Bulk Read and Notification APIs

Kaizen #122 - Data Synchronization using Bulk Read and Notification APIs

Hello everyone!
Welcome back to yet another insightful post in our Kaizen series.

Consider that your organization is involved in selling laptops. Your sales team uses Zoho CRM for their daily activities, managing Leads, Deals, and inventory modules, whereas your Accounts team relies on a legacy application. It is important to maintain data synchronization from Zoho CRM to the legacy system to ensure that the Accounts team always works with the latest information.
To ensure that this synchronization happens in near real-time, the legacy application uses Zoho CRM's Bulk Read API and Notification API.

In this article, we'll discuss how one-way data sync will be achieved for the "Leads" module.

Bulk Read API 

This asynchronous API facilitates the export of up to 200,000 records from a module in a single job. If there are more than 200,000 records, additional API calls are required to fetch all the records.

Notification API

This API allows you to subscribe to events such as creating, updating, and deleting a record in a module through a webhook URL. Each of these actions triggers a corresponding HTTP request to your webhook.

Flow Diagram

The above diagram represents the initial sync on how the legacy application syncs data from Zoho CRM.

Step 1: Sync Start

This is the starting point of the code for the data sync from Zoho CRM to the legacy application and keeping the data updated in near real-time.

Step 2: Subscribe to the channel via Notification API

First, subscribe to events (create, update, and delete) occurring in the Leads module through a channel created via the Notification API, and then trigger the Bulk Read API (Step 3) to synchronize the entire data in Zoho CRM.

Reason:

During the asynchronous execution of the Bulk Read API job, all records from the specific module are saved to a CSV file. Let's consider a scenario where a record that has already undergone processing by the Bulk Read API is updated through the web UI or any other source. This means that the data in the Bulk Read CSV may become outdated by the time the job concludes.

To address this issue, you can leverage the Notification API. You subscribe to a channel, actively monitoring any actions performed on records in that module. When an action occurs, you will receive a notification through the configured URL. Subsequently, upon receiving this notification, you can store the updated data in the legacy database, including the modified time. This ensures that only the most recent data is stored in the database.

Sample Request URL: {{api-domain}}/crm/v6/actions/watch
Request Method: POST

Sample Input
{
    "watch": [
        {
            "channel_id": "10000",
            "events": [
                "Leads.create",
                "Leads.edit",
                "Leads.delete"
            ],
            "channel_expiry": "2024-01-21T00:13:59-08:00",
            "token": "leads.all.notif",
        }
    ]
}

Sample Response
{
    "watch": [
        {
            "code": "SUCCESS",
            "details": {
                "events": [
                    {
                        "channel_expiry": "2024-01-21T00:13:59-08:00",
                        "resource_uri": "https://www.zohoapis.com/crm/v6/Leads",
                        "resource_id": "5725767000000002175",
                        "resource_name": "Leads",
                        "channel_id": "10000"
                    }
                ]
            },
            "message": "Successfully subscribed for actions-watch of the given module",
            "status": "success"
        }
    ]
}

The response confirms a successful subscription for actions-watch on the "Leads" module. For more information about the Notification API, refer to this Kaizen post on the Notification API.

Step 2.1: On each notification, update that record in DB along with the modified time

If a record gets updated or a new record is created, or a record is deleted in the Leads module, you are notified about the change in data via the subscribed notification channel and stored in the legacy database along with the modified time.

Sample JSON Notification Response 

Note: The primary purpose of subscribing to the channel via notification is not to miss any data that has been modified or created during the data backup.

Step 3: Bulk Read Initialize

Initiate the data backup by using the Bulk Read API after subscribing to the channel via Notification API.  As the API is an asynchronous one, a bulk read job is scheduled. After the job is completed on the Zoho CRM end, a notification will be sent via the callback URL. Also, the application can periodically check the job status using the Get the Status of the Bulk Read Job API. 
Note: For the Bulk Read API, the records will be sorted based on the id field in ascending order.

Sample Request for Initial Bulk Read

Request URL:  {{api-domain}}/crm/bulk/v6/read
Request Method:  POST

Sample Input
{
    "callback": {
        "url": "https://www.xyz.com/callback",
        "method": "post"
    },
    "query": {
        "module": {
            "api_name": "Leads",
            "page" : 1
        }
    }
}

Sample Response
{
    "data": [
        {
            "status": "success",
            "code": "ADDED_SUCCESSFULLY",
            "message": "Added successfully",
            "details": {
                "id": "5725767000002002008", //job_id
                "operation": "read",
                "state": "ADDED",
                "created_by": {
                    "id": "5725767000000411001",
                    "name": "Patricia Boyle"
                },
                "created_time": "2024-01-20T04:01:48-08:00"
            }
        }
    ],
    "info": {}
}
For more details and examples, refer to the Create Bulk Read Job API help document. 

Get the Status of Scheduled Bulk Read Job

Check the status of the scheduled bulk read job using the job_id you received.
Request URL: {{api-domain}}/crm/bulk/v6/read/{job_id}
Request Method: GET

Sample Response
{
    "data": [
        {
            "id": "5725767000002025007",
            "operation": "read",
            "state": "COMPLETED",
            "result": {
                "page": 1,
                "per_page": 200000,
                "count": 142,
                "download_url": "/crm/bulk/v6/read/5725767000002025007/result",
                "more_records": false
            },
            "query": {
                "module": {
                    "id": "5725767000000002175",
                    "api_name": "Leads"
                },
                "page": 1
            },
            "created_by": {
                "id": "5725767000000411001",
                "name": "Patricia Boyle"
            },
            "created_time": "2024-01-24T21:35:11-08:00",
            "file_type": "csv"
        }
    ]
}

The above response contains the status of the scheduled job as either ADDED, IN PROGRESS, or COMPLETED.
When the job is complete, the response contains the result JSON object with the keys page, count, more_records, and download_url. The download_url in the callback response from which you can download the zip file containing the CSV file.

Step 4: Sync the Bulk Read data with the legacy DB, if it has a more recent modified time

Once the bulk-read data CSV is available, the data will be updated in the database. If any record's modified time in the CSV file is less than the modified time already present in the database, then it's an outdated record and need not be updated in the legacy's database, as it has already been handled via the Notification API's subscribed channel.

If the CSV contains exactly 200,000 records, there is a possibility of having more records. In the response of the Status of the Bulk Read Job API, if the more_records key is true, it indicates additional records to be exported. To retrieve them, simply update the value of the page key in the POST request and schedule another bulk read job to fetch the next set of records. By default, you can fetch up to 200,000 records in a single API call. Repeat this process until all the records are fetched from the CRM side. For more details on how to download, refer to this Kaizen post about the Bulk Read API.

Channel Resubscription

The channel subscription will remain active for a maximum of one day. After this period, it needs to be re-subscribed using the Enable Notification API to continue receiving notifications for create/update/delete actions in the Leads module. It is recommended to perform the re-subscription every 23 hours and 55 minutes, just short of 24 hours. Note that if the expiry time is not specified during the subscription, it will expire within one hour.

Troubleshooting

There are some scenarios where data synchronization may fail. 
For instance,
1. Unreachable Webhook URL: If the webhook URL is down, Zoho CRM cannot notify data updates through it.
2. Notification Expiry : If the notification expires before resubscribing to the channel, there is a risk of losing newly registered leads in between.
3. The code logic in the Webhook URL may break due to unforeseen reasons.
To handle such scenarios, store the last successful data sync time. Use this stored time as the modified time criteria in the bulk-read API to fetch any missed data and update the database.

We trust that this post meets your needs and is helpful. Let us know your thoughts in the comment section or reach out to us at support@zohocrm.com
Stay tuned for more insights in our upcoming Kaizen posts!
------------------------------------------------------------------------------------------------------------------------------
Previous Kaizen Post : Kaizen #121 - Customize List Views using Client Script
-------------------------------------------------------------------------------------------------------------------------------

Related Links





    • Sticky Posts

    • Kaizen #197: Frequently Asked Questions on GraphQL APIs

      🎊 Nearing 200th Kaizen Post – We want to hear from you! 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 #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.

    • Celebrating 200 posts of Kaizen! Share your ideas for the milestone post

      Hello Developers, We launched the Kaizen series in 2019 to share helpful content to support your Zoho CRM development journey. Staying true to its spirit—Kaizen Series: Continuous Improvement for Developer Experience—we've shared everything from FAQs

    • Kaizen #193: Creating different fields in Zoho CRM through API

      🎊 Nearing 200th Kaizen Post – We want to hear from you! 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.

    • Client Script | Update - Introducing Commands in Client Script!

      Have you ever wished you could trigger Client Script from contexts other than just the supported pages and events? Have you ever wanted to leverage the advantage of Client Script at your finger tip? Discover the power of Client Script - Commands! Commands

    • Recent Topics

    • Latest updates in Zoho Meeting | Breakout rooms and End to end encryption

      Hello everyone, We’re excited to share a few updates for Zoho Meeting. Here's what we've been working on lately: Introducing Breakout Rooms for enhanced collaboration in your online meetings and End-to-end encryption to ensure that the data is encrypted

    • Systematic SPF alignment issues with Zoho subdomains

      Analysis Period: August 19 - September 1, 2025 PROBLEM SUMMARY Multiple Zoho services are causing systematic SPF authentication failures in DMARC reports from major email providers (Google, Microsoft, Zoho). While emails are successfully delivered due

    • Accidentally deleted a meeting recording -- can it be recovered?

      Hi, I accidentally deleted the recording for a meeting I had today. Is there a way I can recover it?

    • To Zoho customers and partners: how do you use Linked Workspaces?

      Hello, I'm exploring how we can set up and use Linked Workspaces and would like to hear from customers and partners about your use cases and experience with them. I have a Zoho ticket open, because my workspace creation fails. In the meantime, how is

    • How to access email templates using Desk API?

      Trying to send an email to the customer associated to the ticket for an after hours notification and can't find the API endpoint to grab the email template. Found an example stating it should be: "https://desk.zoho.com/api/v1/emailtemplates/" + templateID;

    • Update Portal User Name using Deluge?

      Hey everyone. I have a basic intake form that gathers some general information. Our team then has a consultation with the person. If the person wants to move forward, the team pushes a CRM button that adds the user to a creator portal. That process is

    • Zoho Bookings No Sync with Outlook

      Zoho Bookings appointments are showing on my Outlook Calendar but Outlook events are not showing on Zoho Bookings. How do I fix this?

    • Unable to retrieve Contact_Name field contents using Web API in javascript function

      Hello, I've added a field in the Purchase Order form to select and associate a Sales Order (Orden_de_venta, lookup field). I've also created a client script to complete some fields from the Sales Order (and the Quote), when the user specifies the related

    • Updating Woocommerce Variation Products Prices Via Zoho CRM

      I can update product prices with this flow: But I can't update variant products. I got a code from Zoho for this, but I couldn't get it to work. It needs to find the product in the CRM from the SKU field and update the variation with the price there.

    • Emails Disappearing From Inbox

      I am experiencing the unnerving problem of having some of the messages in my inbox just disappear.  It seems to happen to messages that have been in there for longer than a certain amount of time (not sure how long exactly). They are usually messages that I have flagged and know I need to act on, but have not gotten around to doing so yet.  I leave them in my inbox so I will see them and be reminded that I still need to do something about them, but at least twice now I have opened my inbox and found

    • Power of Automation :: Automatic removal of project users once the project status is changed.

      A custom function is a software code that can be used to automate a process and this allows you to automate a notification, call a webhook, or perform logic immediately after a workflow rule is triggered. This feature helps to automate complex tasks and

    • Customizing Form Questions per Recipient Group in Zoho Campaigns/Forms

      Hello everyone, I would like to ask if it’s possible in Zoho Campaigns or Zoho Forms to send out a campaign where the form questions can be customized based on the group of recipients. Use case example: I have prepared 20 questionnaire questions. For

    • Automatic category assignment

      Hi, I’d like to ask if there is a way to automatically assign an expense category based on the recognized Merchant. What would be the simplest way to set up automatic category assignment? Alternatively, is there an option to first choose the category

    • Zoho Books - France

      L’équipe de Zoho France reçoit régulièrement des questions sur la conformité de ses applications de finances (Zoho Books/ Zoho Invoice) pour le marché français. Voici quelques points pour clarifier la question : Zoho Books est un logiciel de comptabilité

    • Every time an event is updated, all participants receive an update email. How can I deactivate this?

      Every time an event is updated in Zoho CRM (e.g. change description, link to Lead) every participant of this meeting gets an update email. Another customer noticed this problem years ago in the Japanese community: https://help.zoho.com/portal/ja/community/topic/any-time-an-event-is-updated-on-zohocrm-calendar-it-sends-multiple-invites-to-the-participants-how-do-i-stop-that-from-happening

    • Having Trouble Opening The Candidate Portal

      Recently am having trouble opening the Candidate Portal. It keeps loading but cannot display any widgets. Tried Safari, Chrome and Edge. Non of them work. Please solve the problem ASAP.

    • Forms - Notification When Response Submitted

      How do I set it up to generate an email notification when a response (class request) is submitted?

    • How to disable user entry on Answer Bot in Zobot

      Hi, I have an Answer Bot in my Zobot, here is the configuration: I only want the user to choose 1 of the 4 the options I have provided: When no answer found, user chooses 'I'll rephrase the question' or 'Ask a different question When answer is found,

    • More admin control over user profiles

      It's important for our company, and I'm sure many others, to keep our users inline with our branding and professional appearance. It would be useful for administrators to have more control over profile aspects such as: Profile image User names Email signatures

    • Please Make Zoho CRM Cadences Flexible: Allow Inserting and Reordering Follow-Up Steps

      Sales processes are not static. We test, learn, and adapt as customers respond differently than expected. Right now, Zoho Cadences do not support inserting a new step between existing follow-ups or changing the type of an existing primary step. If I realize

    • Changing the Default Search Criteria for Finding Duplicates

      Hey everyone, is it possible to adjust the default search criteria for finding and merging duplicate records? Right now, CRM uses some (in my opinion nonsensical) fields as search criteria for duplicate records which do nothing except dilute the results.

    • Clear Tag & Linking Between Quotes and Sales Orders

      Hi Zoho Team, In Zoho Books, when a quote is converted into a sales order, it would be extremely useful to have: A clear tag/indicator on the quote showing that it has been converted into a sales order. A direct link in the sales order back to the originating

    • Zoho Books Sandbox environment

      Hello. Is there a free sandbox environment for the developers using Zoho Books API? I am working on the Zoho Books add-on and currently not ready to buy a premium service - maybe later when my add-on will start to bring money. Right now I just need a

    • Add Direct Ticket Link to Zoho Help Center Portal in Email Replies

      Hi Zoho Support Team, We hope you're doing well. We’d like to request a small but valuable improvement to enhance the usability of the Zoho Help Center portal (https://help.zoho.com/portal/en/myarea). Currently, when someone from Zoho replies to a support

    • [Webinar] Deluge Learning Series - AI-Powered Automation using Zoho Deluge and Gemini

      We’re excited to invite you to an exclusive 1-hour webinar where we’ll demonstrate how to bring the power of Google’s Gemini AI into your Zoho ecosystem using Deluge scripting. Whether you're looking to automate data extraction from PDFs or dynamically

    • Connecting Zoho Inventory to ShipStation

      we are looking for someone to help connect via API shipStation with Zoho inventory. Any ideas? Thanks. Uri

    • 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

    • New in Cadences: Option to Resume or Restart follow-ups when re-enrolling records into a Cadence, and specify custom un-enrollment criteria

      Managing follow-ups effectively involves understanding the appropriate timing for reaching out, as well as knowing when to take a break and resume later, or deciding if it's necessary to start the follow-up process anew. With two significant enhancements

    • Im Stuck in an EDIT ONLY WITH WIZARD issue

      So I found Wizards to be a really helpful tool in minimizing the exposure of redundant, superfluous fields to staff that would never otherwise have to edit those fields. My issue is, that when the record (in this case a lead) is created with a wizard,

    • Account upgrade

      Good evening, I upgraded my account and paid for it. From standard to professional. Unfortunately after the paiment my account was not upgraded. Please your advise. Best Regards Erik van Staverden

    • How to set ALL default dates of my organization to DD-MM-YYYY format?

      All replies to this question comes from a time where the UI was different. It's extremely frustrating not being able to find how to do this simple setting change. I want everything and everyone in my organizations to have DD-MM-YYYY date format by default.

    • How can I sync from Zoho Projects into an existing Zoho Sprints project?

      Hi I have managed to integrate Zoho Projects with Zoho Sprints and I can see that the integration works as a project was created in Zoho Sprints. But, what I would like to do is to sync into an existing Zoho Sprints project. Is there a way to make that

    • Can we generate APK and IOS app?

      Dears, I want to know the availability to develop the app on zoho and after that .. generate the APK or IOS app  and after that I added them to play store or IOS store.. Is it possible to do this .. I want not to use zoho app or let my customers use it. thanks 

    • Zoho Subform Workflows onAdd of Row

      Suppose I have a form with attached workflows onLoad. If I use the form as a subform, will it inherit the workflows or do I need to create new ones onAdd of row?

    • Session Expired

      I constantly get "Session Expired" and need to relogin or close and open the application again. This gets really frustrating during the day. Is this something that can be solved? This really makes me want to leave the app as it is no go to need to reopen

    • Super Admin removal

      I brought a sub, and I gave the Super admin rights to a person who is no longer with us, so I need to change, and I need to make myself the Super admin

    • Better Notes Commenting

      Hi, I'd like to suggest better collaboration tools for NOTES. The current notes section for Accounts, Contacts and Deals is not ideally suitable for any degree of communication or collaboration. When responding to a note, there is no ability to leave

    • Exporting Templates

      I have just spent 2 hours creating a project template for a Netsuite configuration, and want to share it with other Zoho Projects users - who have a different account. Is there any way to do this?

    • Power of Automation:: Streamline Associated Teams based on the Task Owner update.

      Hello Everyone, A Custom function is a user-written set of code to achieve a specific requirement. Set the required conditions needed as when to trigger using the Workflow rules (be it Tasks / Project) and associate the custom function to it. Requirement:

    • No Response from Zoho Support in 8 Days - Typical?

      I have a couple of issues I'm trying to work through. Initially, I was getting support from support@zohofsm.com, but I have not received a response in 8 days (11 on another question). Is this typical? Can I pay for support? For context, I am not spamming

    • Next Page