Developer API & Widget

Cost Segregation Estimator API

Add a cost segregation savings calculator to your website in under 2 minutes. Give your clients instant estimates — powered by SegFlow AI.

See Live Demo View Documentation

Try It Live

This is exactly what the widget looks like when embedded on your website. Enter a property and see the estimated savings.

API Response

// Submit the form to see the live API response here

Add to Your Website

Paste this into any HTML page, WordPress site, Squarespace site, or web app. The widget handles everything — no API keys required.

<div id="costseg-estimator"></div>
<script src="https://segflowai.com/widget/costseg-estimator.js" async></script>

Customize the Widget

Configure the widget using data attributes on the container element.

Attribute	Default	Description
data-accent-color	#2563EB	Primary button and highlight color (hex)
data-cta-text	"Get Your Free Cost Segregation Quote →"	Call-to-action button text
data-cta-url	#	Where the CTA button links (e.g., your contact page)
data-show-branding	true	Show/hide "Powered by SegFlow AI" footer

Customized Example

<div id="costseg-estimator"
  data-accent-color="#16A34A"
  data-cta-text="Schedule a Free Consultation"
  data-cta-url="https://your-firm.com/contact">
</div>
<script src="https://segflowai.com/widget/costseg-estimator.js" async></script>

API Reference

For developers who want to integrate directly rather than using the widget.

Endpoint

POSThttps://segflowai.com/api/estimate

Content-Type: application/json

Request Body

Field	Type	Required	Validation
purchase_price	number	Yes	Min: $50,000. Max: $50,000,000. Integer.
property_type	string (enum)	Yes	Must be one of the values in the Property Type table below
square_footage	number	No	Min: 200. Max: 2,000,000. Integer. Not used in calculation.
zillow_url	string	No	Must be a valid Zillow URL if provided. Lead context only.

Property Type Enum

Enum Value	Display Label
multi_family_apartment	Multi-Family (Apartment)
short_term_rental	Short-Term Rental (STR / Airbnb)
single_family_residential	Single Family Residential
condo_townhome	Condo / Townhome
medical_dental_office	Medical / Dental Office
retail_shopping_center	Retail / Shopping Center
warehouse_industrial	Warehouse / Industrial
general_office	General Office
hotel_hospitality	Hotel / Hospitality
restaurant_bar	Restaurant / Bar

Example Request

curl -X POST https://segflowai.com/api/estimate \
  -H "Content-Type: application/json" \
  -d '{
    "purchase_price": 1250000,
    "property_type": "multi_family_apartment"
  }'

Example Response

{
  "property_type": "multi_family_apartment",
  "property_type_label": "Multi-Family (Apartment)",
  "purchase_price": 1250000,
  "reclassifiable_percentage_range": {
    "low": 0.2,
    "high": 0.3
  },
  "accelerated_depreciation_range": {
    "low": 250000,
    "high": 375000
  },
  "estimated_tax_savings_range": {
    "low": 92500,
    "high": 138750
  },
  "assumptions": {
    "tax_rate": 0.37,
    "method": "rule_of_thumb",
    "disclaimer": "This is a preliminary estimate..."
  }
}

Error Responses

400Validation Error

{
  "error": "validation_error",
  "message": "purchase_price must be at least $50,000",
  "field": "purchase_price"
}

429Rate Limit

{
  "error": "rate_limit",
  "message": "Rate limit exceeded. Try again in 60 seconds."
}

Rate Limits

60 requests per minute per IP address. If you exceed this limit, you'll receive a 429 response. Wait 60 seconds before retrying.

Ready to Offer Cost Segregation to Your Clients?

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