Paragon MLS

Fetch real estate listings from Paragon MLS (paragonrels.com / fnimls.com) APIs and perform four-square rental property analysis. Use when: (1) looking up MLS property details by MLS number or listing ID, (2) analyzing rental properties for cash flow and cash-on-cash return, (3) comparing multiple investment properties, (4) extracting structured data from Paragon MLS listings. Supports any Paragon-backed MLS region (globalmls, imls, hudson, gamls, triangle, etc.).

Fetch real estate listings from Paragon MLS APIs and analyze rental investment properties.

Quick Start

1. Build and configure the MCP server once:

bash

cd paragon-mls-mcp && npm install && npm run build

2. Add to mcporter config (or your MCP client config):

bash

mcporter config add paragon-mls --command "node /home/umbrel/.openclaw/workspace/deal-analyst/paragon-mls-mcp/dist/index.js" --transport stdio

3. Use the tools:

bash

# Fetch all listings from a shared MLS link
mcporter call paragon-mls.fetch_listings mlsId="6d70b762-36a4-4ac0-bedd-d0dae2920867" systemId="globalmls"

# Fetch a single property by MLS number
mcporter call paragon-mls.fetch_property mlsNumber="201918514" systemId="globalmls"

# Analyze a deal with the spreadsheet-compatible Four-Square model
mcporter call paragon-mls.analyze_deal mlsNumbers="201918514" systemId="globalmls" holdingPeriodYears:5 downPaymentPct:0.25

# Analyze multiple properties with custom assumptions
mcporter call paragon-mls.analyze_deal mlsNumbers="201918514,202012345" systemId="globalmls" downPaymentPct:0.25 interestRate:0.065 monthlyInsurance:250 repairBudget:10000 landValue:35000

# Compare velocity banking strategies for a deal
mcporter call paragon-mls.vb_calc debtBalance:350000 interestRate:0.05 loanTermYears:30 monthlyIncome:8000 monthlyExpenses:4878.875681 extraPayment:1000

# Get raw JSON data
mcporter call paragon-mls.raw_listings mlsNumbers="201918514" systemId="globalmls"

Tools

fetch_listings

Fetch all property listings from a Paragon MLS listing GUID. Returns parsed property data for all active listings.

• mlsId (required): Paragon MLS listing GUID from the URL
• systemId (default: globalmls): MLS region ID (subdomain of paragonrels.com)

fetch_property

Fetch a single property by its MLS number. Returns structured property data.

• mlsNumber (required): MLS number for the property
• systemId (default: globalmls): MLS region ID
• mlsId (optional): Listing GUID for link generation

analyze_deal

Perform a spreadsheet-compatible Four-Square analysis on one or more properties. Returns the major columns from the Google Sheet, including NOI, DSCR, principal paydown, appreciation, depreciation, ROI, ROE, and IRR.

Key inputs:

• mlsNumbers (required): Comma-separated MLS numbers
• systemId (default: globalmls): MLS region ID
• holdingPeriodYears (default: 5)
• offerPricePct (default: 1)
• downPaymentPct (default: 0.20)
• interestRate (default: 0.07)
• loanTermYears (default: 30)
• vacancyRate / repairsPct / capexPct / mgmtPct for recurring expense assumptions
• closingCosts / repairBudget / reservePrepaid / privateMoneyLender / landValue for capital stack and tax assumptions
• monthlyPropertyTaxes / monthlySchoolTaxes / monthlyInsurance / monthlyWater / monthlySewer / monthlyGarbage / monthlyElectric / monthlyGas / monthlyHoa / monthlyLawnSnow / monthlyLegalAccounting for direct spreadsheet column overrides
• unitRent1..unitRent7 / laundryIncome / storageIncome / miscIncome for income overrides

vb_calc

Compare amortized debt, extra payments, chunking/basic acceleration, and advanced velocity banking.

• debtBalance (required)
• interestRate (required)
• loanTermYears (default: 30)
• extraPayment (default: 0)
• monthlyIncome (required)
• monthlyExpenses (required)
• helocRate (default: 0.2399)
• advancedRate (default: 0.08)
• helocLimit (default: 20000)
• chunkMonths (default: 6)

raw_listings

Fetch raw JSON data from the Paragon API for custom analysis. Returns unprocessed listing data.

• mlsNumbers (required): Comma-separated MLS numbers
• systemId (default: globalmls): MLS region ID

System IDs

Common Paragon MLS system IDs (the subdomain before .paragonrels.com):

Region	System ID
Eastern NY / Southern Adirondack	globalmls
InterMountain (Idaho)	imls
SW Colorado	cren
Hudson County, NJ	hudson
Georgia	gamls
Triangle Region, NC	triangle

Check your local MLS website URL to find the correct system ID.

How It Works

The server calls Paragon's public CollabLink API endpoints:

1. CreateGuid — generates a session GUID for API calls
2. GetNotificationAppData — resolves a listing GUID into MLS numbers
3. GetListingDetails — fetches property data for each MLS number

Property data is parsed from Paragon's nested JSON structure, handling both the "new" format (section-based DetailOptions) and "old" format (array-based).

Limitations

• Paragon's API is public but unofficial; it may change without notice
• Each MLS region may format listing data differently; the parser handles common formats but edge cases may require custom handling
• No authentication is required for public listing data
• The API returns data over HTTP (not HTTPS) for some regions
• Rate limiting may apply; the server processes listings sequentially with no intentional delay