Zoho Books API v3: Retrieving Detailed Contact Information

The Get a Contact API is the standard method for fetching the "Single Source of Truth" for a specific entity in your ledger. It returns a comprehensive JSON object that includes everything from basic contact info to unused credits and outstanding balances.

At Kalki LLP, we use this endpoint to power custom client portals and high-precision data validation tools for our customers.

1. The Detail Request (GET)

To retrieve a specific contact, you must append the unique contact_id to the request URL.

Endpoint: GET /contacts/{contact_id}?organization_id={organization_id}

Mandatory Headers

2. Comprehensive Data Structure

Unlike the listing API, the response for a single contact is highly detailed. Key sections include:

• Financial Summary: outstanding_receivable_amount, unused_credits_receivable_amount.

• Tax Details: gst_no, vat_treatment, tax_id.

• Contact Persons: An array of all individuals linked to the company.

• Custom Fields: All user-defined fields (e.g., cf_external_id).

• Addresses: Both billing_address and shipping_address objects.

Sample JSON Response Snippet:

{
    "code": 0,
    "message": "success",
    "contact": {
        "contact_id": "460000000026049",
        "contact_name": "Kalki LLP Solutions",
        "company_name": "Kalki Tech Global",
        "payment_terms": 30,
        "currency_code": "INR",
        "outstanding_receivable_amount": 25400.00,
        "contact_persons": [
            {
                "contact_person_id": "460000000026051",
                "first_name": "John",
                "last_name": "Doe",
                "email": "john@kalkillp.com",
                "is_primary_contact": true
            }
        ]
    }
}

3. Implementation in Deluge (Kalki LLP Use Case)

Inside Zoho Books or CRM, you can fetch this data to perform conditional logic (e.g., "If the customer has a balance > 50,000, don't allow new orders").

// Get the specific contact details
contactID = "460000000026049";
response = zoho.books.getRecordsByID("Contacts", "123456789", contactID, "kalki_connection");

if(response.get("code") == 0)
{
    contact = response.get("contact");
    balance = contact.get("outstanding_receivable_amount").toDecimal();
    
    if(balance > 50000)
    {
        info "Kalki Alert: High outstanding balance for " + contact.get("contact_name");
    }
}

4. Error Logs & Troubleshooting

5. Pro-Tip: Leveraging "Unused Credits"

When building payment integrations for kalkillp.com clients, we always fetch the unused_credits_receivable_amount using this API. This allows the system to alert the user that they have existing credit notes they can apply to a new invoice before asking for fresh payment.

Unlock the Full Potential of Your Contact Data

The "Get Contact" API provides the insights needed to make data-driven financial decisions. Kalki LLP specializes in extracting and visualizing this data to help you manage credit risk and customer relationships more effectively.