Kaizen #103 - Bulk Write API using PHP SDK (v5) - Part I

Kaizen #103 - Bulk Write API using PHP SDK (v5) - Part I

Hi everyone and welcome to another amazing Kaizen week!

This week, we will discuss and explore Bulk Write API in detail, and how to implement the same using Zoho CRM PHP SDK. Please note that the information in the article holds true for Zoho CRM PHP SDK supporting version 5 of Zoho CRM APIs.

What is Bulk Write API?

The Bulk Write API enables you to efficiently insert, update, or upsert a large dataset into your CRM account. As this is an asynchronous API, the records will not be added immediately, instead a job will be scheduled to do so. You will receive a notification at the specified callback URL or you can periodically check the job status.

The Bulk Write API allows you to insert, update, or upsert up to 25,000 records in a single API call. This is much more than the maximum of 100 records that you can insert, update, or upsert using the Insert, Update, and Upsert Records API. 

When to use Bulk Write API?

  • When you want to schedule a job to import a huge volume of data in your CRM account.
  • When you want to insert, update, or upsert more than 100 records in a single API call. 
  • When you want to perform background processes like migration and initial data sync between Zoho CRM and external services.

However, the Bulk Write API consumes 500 credits per job, while the Insert, Update, and Upsert records API consumes 1 credit per 10 records. So, if you only need to insert, update, or upsert a small number of records (5,000 or less), it is economical to use the Records API as it will consume fewer credits.

Here are the major differences between Record APIs and Bulk Write API.

Insert, Update, Upsert Records API
Bulk Write API
You can insert, update, or upsert only up to 100 records per API call.
You can insert, update, or upsert 25000 records per API call.
The response is available instantly.
The response to the Bulk Write API request will not be available immediately. You can check the status of the job by polling for it, or you can wait for the status to be available in the callback URL after the job has completed.
The API consumes 1 credit per 10 records.
Bulk Write API consumes 500 credits per API call. 

Bulk Write API 

To insert, update, or upsert records in bulk, follow the below steps:
  1. Prepare your CSV file
  2. Upload your file in zip format
  3. Create a bulk write job
  4. Check the job status
  5. Download the result

1. Prepare the CSV file

To use the Bulk Write API, you must first create a CSV file containing the data you want to import to Zoho CRM. The first row of the CSV file must contain the field API names, and each subsequent row must contain the data. You can insert, update, or upsert records in a single module using one Bulk Write API call.

Input format for each data type:

Datatype
Description
Single Line
Accepts up to 255 characters.
Accepts alphanumeric and special characters.
Ex: Mike O'Leary
Multi-Line
Small - accepts up to 2000 characters.
Large - accepts up to 32000 characters.
Ex: This is a sample description.
Email
Accepts valid email IDs.
Phone
Accepts up to 30 characters. This limit may vary based on the value configured in 'Number of characters allowed' in the properties pop-up of the field, in UI.

Accepts only numeric characters and '+' (to add extensions). 
Ex: 9800000099
Picklist
You can pass an existing pick list value. If you give a new one, it is automatically added to the pick list set.
The pick list value accepts all alphanumeric and special characters.
Ex: auto mobile
Multiselect Picklist
You can either pass the existing pick list values separated by a semicolon(;) or add a new one.
The pick list value accepts all alphanumeric and special characters.
Ex: Analytics;Bigdata
Date
Accepts date in different formats as mentioned here.
Ex: 2023-05-03
DateTime
Accepts date in different formats as mentioned here.
Ex: 2023-05-03T20:39:19+05:30
Number
Accepts numbers up to 9 digits. This limit may vary based on the value configured in 'Maximum digits allowed' in the properties pop-up of the field, in UI. The accepted formats are mentioned here.
Accepts numeric values.
Ex1: 350
Ex2: 123,344
Currency
Before decimal point - accepts numbers up to 16 digits.  This limit may vary based on the value configured in 'Maximum digits allowed' in the properties pop-up of the field, in UI.
After decimal point - accepts precision up to 9 digits. This limit may vary based on the value configured in 'Number of decimal paces' in the properties pop-up of the field, in UI.
Please note that comma separated digits are accepted.
Ex1: 250000.90
Ex2: 123,456.657483
Decimal
Before the decimal point - accepts numbers up to 16 digits. This limit may vary based on the value configured in 'Maximum digits allowed' in the properties pop-up of the field, in UI.
After the decimal point - accepts precision up to 9 digits. This limit may vary based on the value configured in 'Number of decimal places' in the properties pop-up of the field, in UI.
Accepts comma separated numeric values.
Ex1: 250000.50
Ex2: 123,235.345
Percent
Accepts numbers up to 5 digits.
Accepts only numeric values.
Ex: 25
Long Integer
Accepts numbers up to 18 digits. This limit may vary based on the value configured in 'Maximum digits allowed' in the properties pop-up of the field, in UI.
Accepts only numeric values.
Ex: 0012345600012
Checkbox
Accepts only Boolean values(true,false).
Ex: true
URL
Accepts valid URLs.
Lookup
Accepts the unique ID of the record, which you can get through the get records API.
Use the dot(.) operator to link the record. For instance, if there is an account lookup in the Contacts module, you can give the column name as - Account.id
Ex: Account.id : 4150868000001136302
User
This is a default look-up field for users in Zoho CRM. Accepts the unique ID of the user, which you can get through the get users API.
Ex: User.id

Note:
  • To give multiple values for a multi-select pick list field, enclose them in double quotes("") and separate each value with the semicolon(;).
  • If your multi-line field has more than one line, input them directly by enclosing them in double quotes("").
  • You can only zip one CSV file to upload for bulk write. Adding more than one CSV file into the zip file will result in an error.
  • You can specify a specific format for your number, currency, decimal, date and datetime fields using format key.

Subform Data in Bulk Write API:

The Bulk Write API allows you to import and update records with subforms. To insert or update records with subforms, you must import the parent records first with Bulk Write API, and then the subform records with another Bulk Write API. 

For example, consider an instance where you have a subform named "Contact Details" in the Account module. The subform has the following fields - Contact_Name, Contact_Email and Contact_Phone. You must first create a csv file with the parent records, compress it as a zip file, upload it, and create a bulk write job. 



This is an example csv file. Note the Field API names are in the first row, and the record data is in the subsequent rows.

Once you have imported the parent records, you can upload the subform data CSV. When you prepare the subform data CSV file, it is mandatory to have the parent record ID in the subform data file, along with the subform data. 



This is a sample CSV file for the subform data. The subform data in each row will be added to the corresponding parent record. 

Multiselect Lookup Fields in Bulk Write API

To upload records with multiselect lookup fields, you can follow the same steps as for subforms. First, import the parent records. Then, import the multiselect lookup field data. The CSV file should contain both the parent record ID and the multiselect lookup field data. Please note that this method does not work for line items.

User Lookup in Bulk Write API

To import records with user lookup fields, you can include them in the same CSV file as the parent records. Use the field API name of the user lookup field in the CSV header, and add the unique IDs of the lookup records in the data column for each record.

Once you have prepared the CSV file, compress it as a zip file to upload in the next step. We will add examples of how to add subform data, user lookup and multiselect lookup field data in subsequent sections.

2. Upload your zip file

Once you have your csv file ready and compressed into a zip file, you should upload the same using a POST request. Use the following code snippet to upload the file.


<?php
namespace bulkwrite;

use com\zoho\crm\api\bulkwrite\FileBodyWrapper;
use com\zoho\crm\api\bulkwrite\BulkWriteOperations;
use com\zoho\crm\api\util\StreamWrapper;
use com\zoho\crm\api\bulkwrite\UploadFileHeader;
use com\zoho\crm\api\HeaderMap;

require_once "vendor/autoload.php";

class UploadFile
{
  public static function initialize()
  {
      // Add init code here.
      // Refer to this post for more details
  }

  public static function uploadFile1(string $orgID, string $absoluteFilePath)
  {
    $bulkWriteOperations = new BulkWriteOperations();
    $fileBodyWrapper = new FileBodyWrapper();
    $streamWrapper = new StreamWrapper(null, null, $absoluteFilePath);
    $fileBodyWrapper->setFile($streamWrapper);
    $headerInstance = new HeaderMap();
    //To indicate that this a bulk write operation
    $headerInstance->add(UploadFileHeader::feature(), "bulk-write");
    $headerInstance->add(UploadFileHeader::XCRMORG(), $orgID);
    //Call uploadFile method that takes FileBodyWrapper instance and headerInstance as parameter
    $response = $bulkWriteOperations->uploadFile($fileBodyWrapper, $headerInstance);
    // Add your code to handle the response received in the $response.
  }
}

UploadFile::initialize();
$orgID = "add_your_org_id_here"; // add your zgid which you can obtain using Get Organization API.
$absoluteFilePath = "/Users/test/bulk-write.zip"; //add the absolute file path of your zip file here.
UploadFile::uploadFile1($orgID, $absoluteFilePath);

The uploadFile() method takes two parameters: the organization ID ($orgID) and the absolute file path ($absoluteFilePath) of the file to be uploaded. Within the uploadFile() method, an instance of BulkWriteOperations is created to call the Bulk Write API.  This API is used to upload files to the Zoho File System. The HeaderMap instance is created to hold the necessary headers for the API request. The UploadFileHeader::feature() and UploadFileHeader::XCRMORG() methods are used to set the feature and organization ID headers, respectively. These headers are required to identify the type of operation being performed and the organization that the file is being uploaded.
 The uploadFile() method is called on the BulkWriteOperations instance, passing the FileBodyWrapper and HeaderMap as parameters. The response from the API call will be stored in the $response variable, which contains the file ID as well. We will use this file ID in the next step, creating a bulk write job.

We hope you found this post on the Bulk Write API useful. In next week's post, we will cover how to create a bulk write job, including lookup and user lookup fields and subform data. We will also show you how to check the job status and download the job result.

If you have any specific questions about the Bulk Write API, please leave a comment below,  or reach out to us at support@zohocrm.com. We are happy to help!

Thank you for reading! Stay tuned for more useful posts in the series. See you all next week!

    Access your files securely from anywhere







                            Zoho Developer Community




                                                  • Desk Community Learning Series


                                                  • Digest


                                                  • Functions


                                                  • Meetups


                                                  • Kbase


                                                  • Resources


                                                  • Glossary


                                                  • Desk Marketplace


                                                  • MVP Corner


                                                  • Word of the Day


                                                  • Ask the Experts



                                                            • Sticky Posts

                                                            • 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
                                                            • 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.


                                                            Manage your brands on social media



                                                                  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

                                                                                      • CRM Community Learning Series

                                                                                        CRM Community Learning Series


                                                                                      • Kaizen

                                                                                        Kaizen

                                                                                      • Functions

                                                                                        Functions

                                                                                      • Meetups

                                                                                        Meetups

                                                                                      • Kbase

                                                                                        Kbase

                                                                                      • Resources

                                                                                        Resources

                                                                                      • Digest

                                                                                        Digest

                                                                                      • CRM Marketplace

                                                                                        CRM Marketplace

                                                                                      • MVP Corner

                                                                                        MVP Corner









                                                                                          Design. Discuss. Deliver.

                                                                                          Create visually engaging stories with Zoho Show.

                                                                                          Get Started Now


                                                                                            Zoho Show Resources

                                                                                              Zoho Writer

                                                                                              Get Started. Write Away!

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

                                                                                                Zoho CRM コンテンツ



                                                                                                  Nederlandse Hulpbronnen


                                                                                                      ご検討中の方




                                                                                                              • Recent Topics

                                                                                                              • Add Option to Mass Dispatch by User

                                                                                                                Hello! We are using the dispatch console to dispatch service appointments to our service ressources. Right now, the process is our dispatcher verifies each ressource's route for the day and dispatches it after validation. Sadly, there doesn't seem to
                                                                                                              • Zoho Projects - Email notification relabelling of modules not present on default templates

                                                                                                                Hi Projects Team, I noticed that in the default email template notification, the word "bug" was not renamed to the lable I am using in my system. As many users may used the Bugs modules for various purposes including Changes, Revisions, Issues, etc...
                                                                                                              • Include the "Added Email ID" to the Filters of a Report

                                                                                                                Hi, With a Report and lots of entries, a normal thing is to filter entries by the submitter, but that is not included in the Auto Filter of Reports and you can't add a custom filter to a Report without specifying the actual value. I would like to be able
                                                                                                              • Loops in Deluge

                                                                                                                Hi, Can someone tell me how I do a simple loop in deluge? For example, if i have a variable "X" containing a number of loops to perform, i would like to perform an action X amount of times. X = 10; do while (Y < X){       // ... do something } to further explain, the equivalent in PHP of what i am trying to acheive would be: $X = 20; for($Y = 1; $Y < $X; $Y++ ){       // ... do something } Thanks
                                                                                                              • I am facing a problem with an if-else condition

                                                                                                                If I use if, else if, and else conditions in Deluge with the same variable name, sometimes the variable causes an error because the same variable name is present in every block
                                                                                                              • Zoho Projects - Reply by email to @ mentions posted on the Feed.

                                                                                                                When mentioning someone on the Feed (Status), it would be great if that mentioned person could reply to the email notification to update the Feed thread.
                                                                                                              • Record Overseas Transactions Along with CC charges

                                                                                                                Hi All, We receive payments via stripe in multiple currencies and stripe takes around 2.5% fees. The amount is settled in INR into our local bank. What should be the currency of the income account used for Stripe payments? Here is a sample flow that we
                                                                                                              • Product Updates in Zoho Workplace applications | October 2025

                                                                                                                Hello Workplace Community, Let’s take a look at the new features and enhancements that went live across all Workplace applications this October. Zoho Mail Create Signature from Compose window You can now effortlessly create a Signature using the Create
                                                                                                              • Subform data to Sheets

                                                                                                                I have been trying to setup a Zoho Flow automation to bring any Subform input to a Zoho Sheets but it seems impossible to post the subform entries to a Zoho Sheet. Is there any way to do it via Zoho Sheet API? https://www.zoho.com/sheet/help/api/v2/#CONTENT-Insert-row-with-JSON-data
                                                                                                              • Edit Contact Roles in the Potentials Mod

                                                                                                                New to ZOHO so I need some help. I work the same people on different projects concurrency. Their contact info remains the same but their role changes from project to project. In the Potential Mod you can pick contacts and assign a Role to them. I know
                                                                                                              • Is there a way to disable the Activity Reminders Pop-Up Window every time I log in?

                                                                                                                Just wondering if there is a setting to disable the window from opening every time I open my CRM? Thanks Chris
                                                                                                              • Hide fields only for creation

                                                                                                                Hello, I'd like to hide some fields only during the creation of a contact in Zoho CRM. In fact I have some fields that are automatically calculated thanks to an automation, so when my users create a contact I don't want them to fill those fields. I know
                                                                                                              • Rich-text fields in Zoho CRM

                                                                                                                Hello everyone, We're thrilled to announce an important enhancement that will significantly enhance the readability and formatting capabilities of your information: rich text options for multi-line fields. With this update, you can now enjoy a more versatile
                                                                                                              • Font Size 11 - Zoho CRM Email Templates

                                                                                                                Our company communicates with our vendors exclusively using Calibri Font Size 11, as this is the standard formatting for professional emails. Since the CRM only allows for the selection of font sizes 10 & 12, we have been unable to utilize the CRM email
                                                                                                              • Error 400 Booking

                                                                                                                Added a custom domain to Booking. Am Getting a SSL Error that has some other domain on the SSL and giving a 400 error. Followed instructions and it stated it verified our domain.. However it is not working. Please Help!
                                                                                                              • Zoho Projects - Email Notifications for Feed Updates

                                                                                                                Hi Projects Team, I'm working with a client who wants a simple way to communicate with their customers on projects. Getting the customer to add comments to Tasks or Bug records is not ideal, as we need a way which is easy with minimal training, and has
                                                                                                              • Zoho Analytics Export API

                                                                                                                Hi Team, I’m working on some integration tasks and wanted to confirm if it’s possible to retrieve a Zoho Analytics table as JSON data using a Deluge script. I’ve already stored my custom data from multiple sources and combined it into a single source.
                                                                                                              • Request to Remove LinkedIn Verification from My Emai

                                                                                                                I would like to submit a complaint regarding my Zoho Mail account. I previously used this email address to verify a LinkedIn account, but that LinkedIn account has now been closed. I need to remove or cancel the verification associated with the closed
                                                                                                              • Introducing the all-new email parser!

                                                                                                                Greetings, We are pleased to introduce to you, a brand-new, upgraded version of the Zoho CRM Email Parser, which is packed with fresh features and has been completely redesigned to meet latest customers needs and their business requirements. On that note,
                                                                                                              • Zoho Projects - Refine Access to Collaboration Menu

                                                                                                                Hi Projects Team, I noticed that Calendar, Chat and Meeting menu options in the Collaboration section are visible to client users, even when they don't have access to the features. This could be confusing and frustrating, because if it's there you expect
                                                                                                              • Extracting Images from a Zoho Creator Report into a Pages

                                                                                                                If you’ve uploaded images in a form and can see them in your report, you might also want to display those same images inside a Page (custom HTML page). This is useful for dashboards, profile pages, or any place where images should be visible dynamically
                                                                                                              • Zoho is blocking emails I subscribe to from one sender

                                                                                                                About 4 months ago I stopped receiving newsletters that I subscribe to from @thedispatch.com. They tell me that zoho's server is blocking them. I've added them to my contacts list, but they're not even reaching my inbox. I don't know how to troubleshoot
                                                                                                              • Inactive Items - Make Less Prominent by Default

                                                                                                                Currently, when one marks an Item as "Inactive", it really doesn't do much of anything to hide it or get it out of the way. Search and reporting within Finance should, by default, hide inactive Items from standard reports, searches, etc. If one specifically
                                                                                                              • How to calculate GST based on "Ship To Address"

                                                                                                                We into the interior designing work, providing "Works Contract Services" to our clients across India. We are registered under GST in Maharashtra state. For works contract services as per the GST rule, we need to decide place of supply based on "Ship to
                                                                                                              • I NEED TO NUMBER TO TEXT NO HERE

                                                                                                                =NUMBERTEXT NEEED
                                                                                                              • Auto-fill New Row with Previous Row Values

                                                                                                                rowsize = input.Order_Items.count(); for each row1 in input.Order_Items { rowsize = rowsize - 1; if(rowsize == 1) { row.Door_Model = row1.Door_Model; row.Door_Color = row1.Door_Color; row.Materials = row1.Materials;
                                                                                                              • Python - code studio

                                                                                                                Hi, I see the code studio is "coming soon". We have some files that will require some more complex transformation, is this feature far off? It appears to have been released in Zoho Analytics already
                                                                                                              • API question - adding a thread to an existing ticket

                                                                                                                Hi Is there an API function for the customer to add to an existing ticket thread? example, customer puts in new support ticket. support replies and ask for more details. customer replies with more details -what api function is used for this (will add record append to same ticket number?) Thanks
                                                                                                              • Calendar week view: Today + 6

                                                                                                                Is there anyway to have the calendar change dynamically based on the date? Due to the amount of events, we only display a week at a time, but towards the end of the week, we can no longer see ahead to next week (without changing it manually every time).
                                                                                                              • How to restrict user/portal user change canvas view

                                                                                                                Hi , I would like to restrict user / portal user change their canvas view because I hide some sensitive field for them. I dont want my user switch the canvas view that do not belong to them But seems Zoho do not provide this setting?
                                                                                                              • How to add to Subforms via Zapier with Zoho Writer?

                                                                                                                I have the following layout for a Zoho Writer Document. As you can see there is a repeating subform taking in "Items". I am trying to make a Zapier integration with it, and I can see there is 1 field saying: "Items", but it does not specify how I'm supposed
                                                                                                              • Contrôles administratifs granulaires : un atout pour la sécurité des e-mails

                                                                                                                La moindre erreur dans votre système de messagerie peut coûter très cher à votre entreprise, tant en argent qu’en conformité et en image de marque. Pour beaucoup d’organisations, ce risque est bien réel. Les e-mails véhiculent quotidiennement des informations
                                                                                                              • Collections Management: #6 Realign Customers who gets back In-Term

                                                                                                                Arun stared at the subscription list on his dashboard. Another account had just been moved to Cancelled status after completing the whole dunning process. Nothing unusual, just that payment failures happen, retries fail, and cancellation is the expected
                                                                                                              • Zoho Mail IP Blacklist

                                                                                                                I need problems with send mails: Error: junk mail rejected - sender4-op-o10.zoho.com 136.143.188.10, is in RBL. Spamcop. Please remove FQDN for blacklist. Regards.
                                                                                                              • I can receive but not send emails

                                                                                                                Hello, I've been not able to send emails for almost a year now. I been using alternate email to do this. I want to know how to fix this so I can use my zoho account normally again.
                                                                                                              • The challenge of 24/7 connectivity: Being present and meeting customer expectations

                                                                                                                Before television entered our homes, radio was our window to the world. We had to tune carefully to catch voices from distant places. When television arrived, the world began to grow smaller. We can watch rocket launches, see the goal that wins our favorite
                                                                                                              • How to download all attachments from inbox, send, other folders in one go

                                                                                                                Hi All, Appreciate if anyone could help me with steps for below requirement. How to download all attachments from inbox, send, other folders in one go. Even mapping to new folder will help me. Thanks in advance.
                                                                                                              • Cannot connect mail accounts to Thunderbird

                                                                                                                Hi Support - I'm attempting to add my mail accounts to Thunderbird but I'm getting an unable to login to server error. I tried to use the password associated with my account I received the unable to login error. So I went into Zoho Accounts and generate
                                                                                                              • Alias Email Id already exists

                                                                                                                Hi, I just verified my domain sesque (dot) com and now I am trying to create the admin account using admin (at) sesque (dot) com, but I am getting an error saying "Alias Email Id already exists". I used to have another Zoho account with this email address,
                                                                                                              • Unable to connect to smtp server, connection timed out

                                                                                                                Hi Team, I am facing below issue, while sending out emails from thunderbird client. It used to work, facing this issue from morning. Error: Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.zoho.com
                                                                                                              • Next Page