Kaizen #137 - Lead Conversion using Zoho CRM APIs

Kaizen #137 - Lead Conversion using Zoho CRM APIs

Leads represent potential sales opportunities sourced from various channels like trade shows, seminars, and marketing campaigns. When a Lead shows promise, you can convert them into Accounts, Contacts, and Deals.

Imagine you have a Lead named Pat Boyle with her email address as pat.boyle@zylker.com. You want to convert her into a Contact, but what if a Contact with the same email already exists? Converting the lead would create a duplicate record, making it harder to track your interactions with the lead.

The Lead Conversion Options API acts as your safety net before Lead Conversion.  This API assists in identifying matching records from the Accounts, and Contacts module, ensuring data integrity and preventing duplication during the conversion process.

Step 1 : Identify matching records using Lead Conversion Options API

Consider the following lead generated through a marketing campaign for a software company. 

Name : Pat Boyle
Company : Zylker Biotech
Phone : 9844444444

As the sales team progresses with Pat Boyle and decides to convert her into an Account or a Contact, they must be cautious about potential duplicates in their CRM. For instance, if there is already an Account named Zylker Biotech or a Contact named Pat Boyle, converting the lead to create a new Contact could create duplicate records. The Lead Conversion Options API response provides details of potential matches, including existing Accounts or Contacts, along with matching field details.

Matching Criteria:

The matching process relies on unique fields in the Contacts and Accounts modules. In cases where there are no unique fields in these modules, or when there are no matches found based on the unique fields, the matching is performed based on the Email field in the Contacts module, the Account_Name field in the Accounts module with the Company field of the fields module, or the Lead name with the Contact name.

Here is the order of preference for finding the matching records:

In the presence of unique fields in Contacts and/or Accounts module:
  • Contacts module  : Unique Field 1 > Unique Field 2 > Email
  • Accounts module : Unique Field 1 > Unique Field 2 > Account name
In the absence of unique fields:
  • Lead Email checked against the Email fields in the Contacts module.
  • Lead Company checked against the account names (Account_Name) in the Accounts module.
  • The lead's name checked against the Contacts' names in the Contacts module.
In our scenario, let us assume that the Phone in Contacts module is a unique field.

Request method : GET
Sample Response :
{
    "__conversion_options": {
        "module_preference": {
            "api_name": "Contacts",
            "id": "4876876000000002179"
        },
        "Cont​acts": [
            {
                "Full_Name": "Boyle",
                "Email": "pat.boyle@zylker.com",
                "Phone": null,
                "Locked__s": false,
                "Account_Name": null,
                "$editable": true,
                "id": "4876876000007437017",
                "$approval_state": "approved",
                "Data_Processing_Basis": "null"
            },
            {
                "Full_Name": "Pat Boyle",
                "Email": null,
                "Phone": "9844444444",
                "Locked__s": false,
                "Account_Name": {
                    "name": "Zylker Biotech",
                    "Locked__s": false,
                    "id": "4876876000007421010"
                },
                "$editable": true,
                "id": "4876876000007421001",
                "$approval_state": "approved",
                "Data_Processing_Basis": "null"
            }
        ],
        "preference_field_matched_value": {
            "Contacts": [
                {
                    "field": {
                        "api_name": "Phone",
                        "id": "4876876000000002503"
                    },
                    "matched_lead_value": "9844444444"
                },
                {
                    "field": {
                        "api_name": "Email",
                        "id": "4876876000000002497"
                    },
                    "matched_lead_value": "pat.boyle@zylker.com"
                }
            ],
            "Accounts": [
                {
                    "field": {
                        "api_name": "Account_Name",
                        "id": "4876876000000002425"
                    },
                    "matched_lead_value": "Zylker Biotech"
                },
                {
                    "field": {
                        "api_name": "Phone",
                        "id": "4876876000000002427"
                    },
                    "matched_lead_value": "9844444444"
                }
            ]
        },
        "Accounts": [
            {
                "Layout": {
                    "name": "Standard",
                    "id": "4876876000000091029"
                },
                "Phone": null,
                "Account_Type": null,
                "Locked__s": false,
                "Website": null,
                "Account_Name": "Zylker Biotech",
                "$editable": true,
                "id": "4876876000007421010",
                "$approval_state": "approved"
            }
        ],
        "modules_with_multiple_layouts": [ //
            {
                "api_name": "Accounts",
                "id": "4876876000000002177"
            }
        ]
    }
}


The preference_field_matched_value object in the response contains the details such as the field and the value of the Contact and Account that matches with the lead. The Contacts and Accounts JSON objects contain the details of the matching records. As per the response, there are two Contacts and one Account with similar details to our Lead.
  • A Contact (Pat Boyle) has the same Phone 9844444444 (matching field) as the Lead
  • A Contact (Boyle) with the same Email pat.boyle@zylker.com (matching field) as the Lead
  • An Account with the same Account_Name Zylker Biotech as the Company of the Lead.

Step 2 : Perform Lead Conversion using Convert Lead API

You can convert a Lead into a Contact, Account, and a Deal using this API. From the Lead conversion options API, we have the matching Contacts and Accounts for the specific deal. Based on the Lead Conversion Options API's response, you can choose to create a new record in the Contacts or Accounts module, or move the Lead record to existing matching records in these modules during Lead Conversion.
During Lead conversion, the Lead's field values are mapped to the corresponding Accounts, Contacts, and Deals records. By default, Zoho CRM automatically maps standard Lead fields to their corresponding fields in Accounts, Contacts, and Deals. The lead mapping tool allows for customization, enabling you to map any additional fields specific to your sales process. 

Request method: POST
Input JSON keys:

Input JSON key
Description
overwrite
Boolean, optional
Represents whether to overwrite the account name in the contact if the account name and company in the lead mismatch. Ignored when the Lead has no value for the Company field.
true: Overwrites the Contact's Account name with the Lead's company name. false: Leaves the existing Account name unchanged, potentially causing inconsistencies.
Default value : false
notify_lead_owner
Boolean, optional
Specifies whether the lead owner should be notified about the lead conversion via email.
Default value : false
notify_new_entity_owner Boolean, optional
Specifies whether the owner of the newly created Contact or Account receives an email notification
Default value : false
move_attachments_to
JSON object, optional
Specify the module (Contacts, Deals, or Accounts) where you want to move the Lead's attachments after conversion.
Default value : Contacts
Accounts
JSON object, optional
Specify the account with which the lead being converted should be merged. Pass the valid account ID.
Contacts
JSON object, optional
Specify the contact with which the lead being converted should be merged. Pass the valid contact ID.
assign_to
JSON object, optional
The user to which the converted record should be assigned. Pass the valid user ID.
Deals
JSON object, optional
Create a new Deal associated with the converted Lead. Requires details like Deal_Name, Closing_Date, Pipeline, and Stage. You can also assign a Contact_Role by providing the unique contact role ID.
carry_over_tags
JSON object, optional
Carries over tags of the lead to contact, account, and deal. 

Case I : Convert Lead to merge with existing records:

In this case, you can merge the lead record with existing records in the Accounts and/or Contacts module to avoid duplication. You can also create a Deal record providing the necessary details like Deal_Name, Closing_Date, Pipeline, and Stage.

Sample Input: 
{
  "data": [
    {
      "overwrite": true,
      "notify_lead_owner": true,
      "notify_new_entity_owner": true,
      "Accounts": {
        "id": "4876876000007421010"
      },
      "Contacts": {
        "id": "4876876000007421001"
      },
      "Deals": {
        "Deal_Name": "Zylker Deal",
        "Closing_Date": "2024-10-20",
        "Stage": "Negotiation/Review",
        "Amount": 20000000,
        "Pipeline": "Standard (Standard)"
      }
    }
  ]
}

Sample Response:

{
  "data": [
    {
      "code": "SUCCESS",
      "details": {
        "Contacts": {
          "name": "Pat Boyle",
          "id": "4876876000007421001"
        },
        "Deals": {
          "name": "Zylker Deal",
          "id": "4876876000007459060"
        },
        "Accounts": {
          "name": "Zylker Biotech",
          "id": "4876876000007421010"
        }
      },
      "message": "The record has been converted successfully",
      "status": "success"
    }
  ]
}

Points to Note:
  • If the record data doesn't match perfectly with the Lead data, an INVALID_DATA error will be thrown. For example,If you try to merge the Lead with a Contact or Account not found in the Lead Conversion Options API response, you will encounter this error if the data doesn't match.
  • During lead conversion, you can transfer the lead to a contact, an account, or both. If you transfer to a contact that is already linked to an account, the lead will automatically be converted and associated with that account as well.
  • To successfully merge a Lead record with an existing Contact and Account record, the Contact should be associated with the specified Account. If not, you will get an INVALID_DATA error.
  • If the Lead record's Company field is empty, and no account is specified in the JSON input, an account will not be automatically created. However, even if you omit the account in the input JSON, a new account will be created if there is Company name associated with the Lead.
  • Unless specified, a deal record will not be created.

Case II : Convert Lead and create new records:

If the Accounts and Contacts records are not specified during the Lead conversion, new Contact and Account records will be created from the converted Lead, mapping the field values according to the field mapping

Points to Note :
  • If there already exists a record in the Accounts or Contacts module with the same value for a unique field as the lead being converted, a DUPLICATE_DATA error will be thrown, with details about the existing record found in the Accounts or Contacts module.
  • Unless specified, a deal record will not be created.
Sample Input:

{
  "data": [
    {
      "overwrite": true,
      "notify_lead_owner": true,
      "notify_new_entity_owner": true
    }
  ]
}

Sample Response:
{
  "data": [
    {
      "code": "SUCCESS",
      "details": {
        "Contacts": {
          "name": "Pat Boyle",
          "id": "4876876000007482059"
        },
        "Deals": null,
        "Accounts": {
          "name": "Zylker Biotech",
          "id": "4876876000007482056"
        }
      },
      "message": "The record has been converted successfully",
      "status": "success"
    }
  ]
}

Important Points : 

  • If the Contacts module is removed from organize modules, lead conversion is not allowed. In such cases, the Lead Conversion Options API will return a 204 response.
  • If the Accounts module is removed from organize modules, the Lead Conversion Options API will not consider Accounts for matching. Only Contacts-related matching options will be listed.
  • If the Company field is removed from the Leads module, Account-related matching will be skipped, and only contact-related options will be listed.
  • You cannot convert Leads that are locked or have not been approved yet.
  • Associating Leads with locked Contacts or Accounts is not possible.
  • If the Lead you are trying to convert has already been converted, the ID_ALREADY_CONVERTED error will be thrown.
  • To convert leads in bulk, use the Mass Convert Lead API, using which you can convert up to 50 leads in a single API call. The Mass Convert Lead API schedules a conversion job for the specified leads. You can then retrieve the details of the conversion job using the Mass Convert Lead Status API.
We hope that you found this post on Lead Conversion useful. If you have any queries or need further assistance, please feel free to comment below or email us at support@zohocrm.com. We are here to help!




Recommended Reads:



Previous Post : Zoho CRM Widgets using ReactJS | Kaizen Collection : Home
Join us for our upcoming Zoho CRM Developer Series: Zoho CRM APIs, where you can explore more about Zoho CRM APIs. Register Now!  

    • 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

    • Rename Record Summary PDF in SendMail task

      So I've been tasked with renaming a record summary PDF to be sent as part of a sendmail task. Normally I would offer the manual solution, a user exports the PDF and uploads it to a file upload field, however this is not acceptable to the client in this
    • in zoho creator Sales Returns form has sub form Line Items return quantity when i upate the or enter any values in the sub form that want to reflect in the Sales Order form item deail sub form field Q

      in zoho creator Sales Returns form has sub form Line Items return quantity when i upate the or enter any values in the sub form that want to reflect in the Sales Order form item deail sub form field Quantity Returned\ pls check the recording fetch_salesorder
    • Estimates with options and sub-totals

      Hi It seems it would be great to be able to show multiple options in an estimate. For instance I have a core product to which I can add options, and maybe sub-options... It would be great to have subtotals and isolate the core from the not compulsory items. Thanks
    • Optional Items Estimate

      How do you handle optional items within an estimate? In our case we have only options to choose with. (Like your software pricing, ...standard, professional, enterprise) How can we disable the total price? Working with Qty = 0 is unprofessional....
    • Important Update : Zendesk Sell announced End of Life

      Hello Zendesk users, Zendesk has officially announced that Zendesk Sell will reach its End of Life (EOL) on August 31, 2027 (Learn more). In line with this deprecation, Zoho Analytics will retire its native Zendesk Sell connector effective October 1,
    • Zoho Sheets

      Hi, I am trying to transition into Zoho sheets, I have attached the issues encountered. Server issues, file trying to upload for more than 30 mins, even once uploaded my data aren't loaded. Simple calculations are not working I have attached the sample.
    • Zoho CRM + Zoho FSM : alignez vos équipes commerciales et techniques

      La vente est finalisée, mais le parcours client ne fait que commencer ! Dans les entreprises orientées service, conclure une vente représente seulement la première étape. Ce qui suit — installation, réparation ou maintenance régulière — influence grandement
    • Top Bar Shifting issue still not fixed yet

      I mentioned in a previous ticket that on Android, the top bar shifts up when you view collections or when you're in the settings. That issue still hasn't been fixed yet. I don't wanna have to reinstall the app as I've noticed for some reason, reinstalling
    • Power of Automation:: Automate the process of updating project status based on a specific task status.

      Hello Everyone, Today, I am pleased to showcase the capabilities of a custom function that is available in our Gallery. To explore the custom functions within the Gallery, please follow the steps below. Click Setup in the top right corner > Developer
    • ZOHO SHEETS

      Where can I access desktop version of zoho sheets? It is important to do basic work If it is available, please guide me to the same
    • Attention API Users: Upcoming Support for Renaming System Fields

      Hello all! We are excited to announce an upcoming enhancement in Zoho CRM: support for renaming system-defined fields! Current Behavior Currently, system-defined fields returned by the GET - Fields Metadata API have display_label and field_label properties
    • Billing Management: #3 Billing Unbilled Charges Periodically

      We had a smooth sail into Prorated Billing, a practice that ensures fairness when customers join, upgrade, or downgrade a service at any point during the billing cycle. But what happens when a customer requests additional limits or features during the
    • No bank feeds from First National Bank South Africa since 12 September

      I do not know how Zoho Books expects its customers to run a business like this. I have contacted Zoho books numerous times about this and the say it is solved - on email NO ONE ANSWERS THE SOUTH AFRICAN HELP LINE Come on Zoho Books, you cannot expect
    • Citation Problem

      I had an previous ticket (#116148702) on this subject. The basic problem is this; the "Fetch Details" feature works fine on the first attempt but fails on every subsequent attempt, Back in July after having submitted information electronically and was
    • Open Sans Font in Zoho Books is not Open Sans.

      Font choice in customising PDF Templates is very limited, we cannot upload custom fonts, and to make things worse, the font names are not accurate. I selected Open Sans, and thought the system was bugging, but no, Open Sans is not Open Sans. The real
    • Failing to generate Access and Refresh Token

      Hello.  I have two problems: First one when generating Access and Refresh Token I get this response:  As per the guide here : https://www.zoho.com/books/api/v3/#oauth (using server based application) I'm following all the steps. I have managed to get
    • Zeptomail 136.143.188.150 blocked by SpamCop

      Hi - it looks like this IP is being blocked, resulting in hard bounces unfortunately :( "Reason: uncategorized-bounceMessage: 5.7.1 Service unavailable; Client host [136.143.188.150] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?136.143.188.150
    • Apply transaction rules to multiple banks

      Is there any way to make transaction rules for one bank apply to other banks? It seems cumbersome to have to re-enter the same date for every account.
    • How to bulk update records with Data Enrichment by Zia

      Hi, I want to bulk update my records with Data Enrichment by Zia. How can I do this?
    • Need Guidance on SPF Flattening for Zoho Mail Configuration

      Hi everyone, I'm hoping to get some advice on optimizing my SPF record for a Zoho Mail setup. I use Zoho Mail along with several other Zoho services, and as a result, my current SPF record has grown to include multiple include mechanisms. My Cloudflare
    • How do I split a large CSV file into smaller parts for import into Zoho?

      Hi everyone, I’m trying to upload a CSV file into Zoho, but the file is very large (millions of rows), and Zoho keeps giving me errors or takes forever to process. I think the file size is too big for a single import. Manually breaking the CSV into smaller
    • Client Script Payload Size Bug

      var createParams = { "data": [{ "Name": "PS for PR 4050082000024714556", "Price_Request": { "id": "4050082000024714556" }, "Account": { "id": "4050082000021345001" }, "Deal": { "id": "4050082000023972001" }, "Owner": { "id": "4050082000007223004" }, "Approval_Status":
    • Sync Issue Between Zoho Notebook Web App on Firefox (PC) and Android App

      Hi Zoho Notebook Community, I'm facing a sync problem with Zoho Notebook. When I use the web version on Mozilla Firefox browser on my PC, I create and save new notes, and I've synced them successfully. However, these new notes aren't showing up in my
    • Messages not displayed from personal LinkedIn profile

      Hello. I connected both our company profile and my personal profile to Zoho social. I do see all messages from our company page but none from my private page. not even the profile is being added on top to to switch between company or private profile,
    • lead convert between modules

      Hello, The workflow we set up to automatically transfer leads registered via Zapier into the Patients module to the Leads module started to malfunction unexpectedly on September 25, 2025, at 11:00 AM. Under normal circumstances, all fields filled in the
    • Flow Task Limits - How to Monitor, Understand Consumption?

      So, I got an email last night saying that I've exhausted 70% of my tasks for this month, and encouraging me to buy more tasks. I started to dig into this, and I cannot for the life of me figure out where to find any useful information for understanding,
    • Cross References Do Not Update Correctly

      I am using cross references to reference Figures and current am just using the label and number, i.e. Figure #. As seen here: When I need to update the field, I use the update field button. But it will change the cross reference to no longer only including
    • Manage control over Microsoft Office 365 integrations with profile-based sync permissions

      Greetings all, Previously, all users in Zoho CRM had access to enable Microsoft integrations (Calendar, Contacts, and Tasks) in their accounts, regardless of their profile type. Users with administrator profiles can now manage profile-based permissions
    • How to Track and Manage Schedule Changes in Zoho Projects

      Keeping projects on track requires meticulous planning. However, unforeseen circumstances can cause changes to schedules, leading to delays. It becomes important to capture the reason for such changes to avoid them in the future. Zoho Projects acknowledges
    • Is there a notification API when a new note is addeding

      Trying to push to Cliq, or email notification when there's a new note added in module. How to implement this?
    • Zoho Sheet - Desktop App or Offline

      Since Zoho Docs is now available as a desktop app and offline, when is a realistic ETA for Sheet to have the same functionality?I am surprised this was not laucned at the same time as Docs.
    • Collaborate Feature doesn't work

      Hello Team. It seems that the collaborate section is broken? I can post something but it all appears in "Discussions". In there is no way how I would mark something as Draft, Approval, post or any of the other filter categories? Also if I draft a post
    • Edit Permission during and after approval?

      When a record is sent for approval Can a user request for edit permission from the approver? We don't want to give edit permissions for all the records under approval Only on a case-by-case basis How can we achieve this?
    • Zoho web and mobile application not workingn

      Both zoho forms web and mobile application aren't working. I have checked my network connections and they are fine.
    • Introducing the revamped What's New page

      Hello everyone! We're happy to announce that Zoho Campaigns' What's New page has undergone a complete revamp. We've bid the old page adieu after a long time and have introduced a new, sleeker-looking page. Without further ado, let's dive into the main
    • Prevent stripping of custom CSS when creating an email template?

      Anyone have a workaround for this? Zoho really needs to hire new designers - templates are terrible. A custom template has been created, but every time we try to use it, it strips out all the CSS from the head.  IE, we'll define the styles right in the <head> (simple example below) and everything gets stripped (initially, it saves fine, but when you browse away and come back to the template, all the custom css is removed). <style type="text/css"> .footerContent a{display:block !important;} </style>
    • Bulk Moving Images into Folders in the Library

      I can't seem to select multiple images to move into a folder in order to clean up my image library and organize it. Instead, I have to move each individual image into the folder and sometimes it takes MULTIPLE tries to get it to go in there. Am I missing
    • 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?
    • Next Page