Paragon MLS

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

Quick Start

1. Build and configure the MCP server once:

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

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

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

1. Use the tools:

# 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):

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