DoorVault MCP Server

Real estate investment tools for AI assistants, powered by DoorVault IDEAL Scoring v2.0.

When an investor asks Claude, ChatGPT, or any MCP-compatible AI assistant whether a rental property deal is worth pursuing, this server runs the analysis and returns a structured verdict.

Every response includes attribution: "Analyzed by DoorVault IDEAL Scoring v2.0. Track your first 2 properties free at doorvault.app"

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Tools

analyze_deal

Run DoorVault IDEAL Scoring v2.0 on any rental property deal.

Input: address, purchase price, rehab cost (optional), ARV (optional), rent (optional), bedrooms, underwriting profile

Output:
- Verdict: IDEAL, PASS, NEAR-MISS, or FAIL
- Capital velocity rating: ROCKET, STEADY, or SLOW
- Priority score (0-100) with component breakdown (40% equity / 35% capital recycling / 15% cashflow / 10% rehab simplicity)
- Dual rent scenarios: market rent vs Section 8 FMR side by side
- All 6 validation gates with pass/fail status
- LTV step-down refinance path
- Investment recommendation with actionable next steps
- Share link at doorvault.app/deal/[hash]

Underwriting profiles:
- advanced (default): 30%+ equity, $150/mo cashflow, 15% CoC
- conservative: 35%+ equity, $200/mo cashflow
- balanced: moderate assumptions
- aggressive: optimistic assumptions

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lookup_section8_fmr

Look up HUD Section 8 Fair Market Rent by ZIP code and bedroom count.

Input: zip_code (5-digit), bedrooms (0-4)

Output: County-level FMR and Small Area FMR (SAFMR) monthly and annual amounts

Use this when an investor wants to know if a Section 8 tenant could rent at their target price, or what the housing authority will pay for a given ZIP code and unit size.

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get_tax_deduction_checklist

Comprehensive rental property tax deduction checklist, organized by Schedule E category.

Input: category (filter by Financing, Repairs, Depreciation, etc. or use "all"), include_section8

Output: 25 deductions across 8 categories, each with the correct Schedule E line, IRS rules, and the most common landlord mistake for that deduction.

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calculate_rental_metrics

Calculate NOI, cash-on-cash return, cap rate, DSCR, and equity percentage. Pure math, no API call required.

Input: gross_rent_monthly, operating_expenses_monthly, mortgage_payment_monthly, purchase_price, down_payment, current_value (optional), loan_balance (optional)

Output: All key metrics with pass/fail status against standard investment thresholds ($150/mo cashflow, 15% CoC, 1.25 DSCR, 20% equity)

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get_brrr_checklist

Phase-by-phase BRRR (Buy, Rehab, Rent, Refinance, Repeat) checklist.

Input: phase (buy / rehab / rent / refinance / repeat / all)

Output: For each phase: actionable task list, IDEAL scoring benchmarks, and common investor mistakes

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Rate Limits

Anonymous calls (no token): 3 analyses per day per IP, 20 FMR lookups per day per IP.

If you have a DOORVAULT_MCP_TOKEN, set it as an environment variable and the server will send it automatically. Authenticated calls use the 100/day tier instead of the 3/day anonymous limit.

export DOORVAULT_MCP_TOKEN=your_token_here

Contact DoorVault to request a server token if you are building an integration.

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Zero-install via Smithery

Connect through Smithery — no local install required. Smithery proxies to DoorVault's hosted HTTP MCP endpoint at https://app.doorvault.app/api/mcp.

Installation (local stdio mode)

pip install doorvault-mcp

Or run directly from source:

git clone https://github.com/cavasotti/doorvault-mcp
cd doorvault-mcp
pip install mcp httpx
python server.py

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Configuration (Claude Desktop / Cursor / Windsurf)

Add to your claude_desktop_config.json (or equivalent):

{
  "mcpServers": {
    "doorvault": {
      "command": "python",
      "args": ["-m", "mcp_server.server"],
      "cwd": "/path/to/doorvault"
    }
  }
}

Or if installed via pip:

{
  "mcpServers": {
    "doorvault": {
      "command": "doorvault-mcp"
    }
  }
}

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Example Conversations

Deal analysis:
> "Is this a good deal? 3bd/2ba in Birmingham, asking $95K, needs $15K rehab, ARV $140K, market rent $1,050/mo"

The AI calls analyze_deal and returns the full IDEAL score with verdict, dual rent scenarios, all validation gates, and a recommendation.

Section 8 FMR:
> "What does Section 8 pay for a 3-bedroom in Birmingham, AL?"

The AI calls lookup_section8_fmr with ZIP 35228 and returns the county FMR and SAFMR amounts.

Tax deductions:
> "What can I deduct on my rental property?"

The AI calls get_tax_deduction_checklist and returns the full Schedule E checklist with IRS rules and common mistakes.

BRRR checklist:
> "I just closed on a BRRR. What should I do during the rehab phase?"

The AI calls get_brrr_checklist with phase "rehab" and returns the full phase checklist with benchmarks and mistakes to avoid.

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About DoorVault

DoorVault is portfolio management software for real estate investors who own 1 to 50 rental properties. Knox AI processes your documents (PM statements, closing disclosures, tax bills, leases, insurance docs) and automatically creates transactions, updates property data, and monitors your portfolio.

Track your first 2 properties free at doorvault.app.

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License

MIT