Resideline Real Estate Data API
Power your applications with property valuations, rental analysis, and market data. Built for developers and higher volume workflows.
Why Choose Resideline API?
Real estate data for applications and workflows.
Structured responses
Return property data and valuation results through documented JSON endpoints.
Broad market coverage
Rental analysis can run in all 50 states. Sale valuations depend on property and market data availability.
Market Intelligence
Comparable sale analysis and market trends.
Scalable
From single queries to enterprise-level integrations
How Our Multi-Family Valuation Model Works
Value duplexes, triplexes, and apartment buildings with a transparent, data driven GRM methodology.
Income-Based Valuation
Unlike single-family homes valued on sales comps, multi-family properties are valued based on their income potential using Gross Rent Multiplier (GRM) methodology.
Dual Valuation Approach
Get both "As-Is" value based on current rents and "Potential Value" assuming market-rate rents, perfect for identifying value-add opportunities.
Accuracy You Can Audit
Our public scoreboard tracks 3.37% median error across 17,929+ graded closings in 37 states, published daily at resideline.com/accuracy.
The GRM Formula
How we calculate multi-family property values
Property Value = Monthly Gross Rent × 12 × GRM
Where GRM = Market-derived Gross Rent Multiplier for the area
Example: 4-Unit Property
- • Current rent: $1,200/unit × 4 = $4,800/mo
- • Market GRM: 12.5
- • As-Is Value: $4,800 × 12 × 12.5 = $720,000
Value-Add Opportunity
- • Market rent: $1,500/unit × 4 = $6,000/mo
- • Market GRM: 12.5
- • Potential Value: $6,000 × 12 × 12.5 = $900,000
Quick Start
Get started with the Resideline API in minutes
Base URL
https://resideline.com:2087Authentication
All API requests require authentication. Include these headers with every request:
API-Key: your_api_keyContent-Type: application/jsonExample Request
curl -X POST "https://resideline.com:2087/v1/api/property_details" \
-H "API-Key: your_api_key" \
-H "Content-Type: application/json" \
-d '{"address": "123 Main St, Miami, FL 33101"}'Getting Your API Key
Create an account, then click "Reveal Key" on your profile dashboard to get your API key.
Rate Limits
Free Plan
10 req/min
100 requests/day
Business plan
60 req/min
1,000 requests/day
Custom Volume
300 req/min
10,000 requests/day
Our Advanced Comp Algorithm
Comparable sale analysis with configurable matching.
Smart Radius Expansion
Starts with a tight radius and automatically expands until it finds relevant matches, prioritizing relevant comparables while keeping the selected set visible for review.
Apples-to-Apples Matching
Comps are scored by similarity including property type, size, bedrooms, bathrooms, and other key characteristics for accurate comparisons.
Recent sale data
Comp selection prioritizes recent, nearby sales and can expand time and distance when a local sample is too thin. The response exposes the selected comps so callers can inspect recency and distance.
Algorithm Details
Scoring Methodology
- • Property Similarity: Matches by property type, square footage, bedrooms, bathrooms
- • Distance Weight: Closer properties receive higher scores
- • Freshness Factor: More recent sales are weighted higher
- • Market Conditions: Adjusts for seasonal and market trends
Quality Filters
- • Recent sales, with broader lookbacks when the local sample is too thin
- • Properties within 1 mile radius (expands if needed)
- • Excludes distressed sales and foreclosures
- • Minimum of 3 comparable properties when available
API Endpoints
Credit Usage per Endpoint
property_details
1 credit
property_report
10 credits
rent
2 credits
strlyzer
5 credits
property_value
2 credits
POST/v1/api/property_details
1 creditRetrieve detailed property information including beds, baths, square footage, year built, images, and location data. Use this endpoint first to gather property details before running analysis.
Request Body (JSON)
addressrequiredstringFull property address including city, state, and ZIP code
Example: "123 Main St, Miami, FL 33101"
cURL Example
curl -X POST "https://resideline.com:2087/v1/api/property_details" \
-H "API-Key: your_api_key" \
-H "Content-Type: application/json" \
-d '{
"address": "123 Main St, Miami, FL 33101"
}'Response Example
{
"address": "123 Main St, Miami, FL 33101",
"lat": 25.7617,
"lng": -80.1918,
"property_info": {
"beds": 3,
"baths": 2,
"sqft_size": 1850,
"subject_year_built": "1995",
"property_type": "Single-family",
"images": ["https://..."]
}
}Error Handling
The API uses standard HTTP status codes to indicate success or failure.
HTTP Status Codes
200Success - Request completed successfully400Bad Request - Invalid parameters or missing required fields401Unauthorized - Invalid or missing API key403Forbidden - Insufficient credits or permissions404Not Found - Property or resource not found429Rate Limited - Too many requests, slow down500Server Error - Something went wrong on our endError Response Format
Documented error responses include a descriptive message and suggestion for resolution:
{
"detail": "Invalid API key provided",
"code": "INVALID_API_KEY",
"suggestion": "Check that your API-Key header is correct"
}detailHuman-readable error messagecodeMachine-readable error codesuggestionRecommended action to resolve the issuePricing & Credits
Each API endpoint consumes credits based on the complexity of the data returned.
Credit Usage per Endpoint
/v1/api/property_details1 creditBasic property information
/v2/api/property_report10 creditsFull valuation with comps
/v2/api/rent2 creditsRental analysis
/v2/api/strlyzer5 creditsShort term rental analysis
/v2/api/property_value2 creditsQuick valuation
| Endpoint | Description | Credits |
|---|---|---|
| /v1/api/property_details | Basic property information | 1 |
| /v2/api/property_report | Full valuation with comps | 10 |
| /v2/api/rent | Rental analysis | 2 |
| /v2/api/strlyzer | Short-term rental analysis | 5 |
| /v2/api/property_value | Quick valuation | 2 |
Get Your API Key
Real Estate Data API FAQ
What data does the Resideline API return?
Endpoints cover property details, full property reports with ARV and sold comparables, market rent estimates, short-term rental projections, fast point valuations, and zip-level market statistics. Successful property report and property value responses expose the comparable sale evidence and confidence fields returned by the valuation engine.
What coverage does the property data API have?
Resideline can run rental estimates, sale valuations and ARV analysis nationwide. Comparable availability and result quality vary by property and market, especially where recorded sale prices are limited. Public grading against closing prices depends on recorded closing data availability and is strongest in disclosure states. Accuracy is graded in public: the live scoreboard shows 3.37% median error across 17,929+ graded closings.
How much does API access cost?
API access comes with the Business plan at $249 per month, which includes 500 reports per month, bulk analysis, and 3 seats. Credit packs start at $15 for 100 credits when you need more volume, and custom pricing is available for high-volume use.
How do I get an API key?
Sign up for the Business plan and your API key is available from the dashboard. The quick start section above shows a working request you can copy. For integration help or volume questions, contact [email protected].
Need white label reports, portfolio scoring, or custom volume? See our enterprise options.