How to Integrate Redfin with V0

Before generating your UI in V0, select the real estate data API that best fits your use case. The three most developer-friendly options for V0 Next.js projects are ATTOM, Estated, and RealtyMole (Rentcast). ATTOM Data Solutions (attomdata.com) is the most comprehensive — it has 155 million US property records covering ownership, valuation, AVM estimates, deed history, tax assessments, school ratings, and neighborhood data. ATTOM's API uses API key authentication in the apikey header. The free developer tier includes 250 API calls per day. Estated (estated.com) provides property details and transaction history with a particularly clean REST API and straightforward JSON responses. Their free tier allows 1,000 property lookups per month, which is sufficient for development. Authentication uses an API key in a query parameter. RealtyMole (now Rentcast at rentcast.io) focuses on rental market data — rental estimates, vacancy rates, and rental comparables — making it ideal if your app focuses on investment properties or rental analysis rather than for-sale listings. For active MLS listings (homes currently for sale), IDX (Internet Data Exchange) APIs like iHomeFinder, IDX Broker, or Spark API provide access to MLS data but require a real estate agent or broker affiliation. Choose your provider based on your specific data needs: property details (ATTOM or Estated), rental analysis (RealtyMole/Rentcast), or active listings (IDX provider with broker affiliation).

Open V0 at v0.dev and describe the property-focused interface you want to build. Real estate UIs require specific design patterns: address search inputs with autocomplete, property stat cards showing numerical data with icons, map views for geographic context, and price history charts for trend analysis. For a property lookup tool, describe a clean search interface with an address input field and a results section that shows the property card data. Specify the data fields you want to display — estimated value, square footage, bedrooms, bathrooms, year built, last sale date — and V0 generates the appropriate layout with proper typography for numerical data. For market analysis dashboards, describe Recharts line charts for price trends and pie/donut charts for property type breakdowns — V0 works well with Recharts components and generates the chart configuration code. Include the loading states (skeleton placeholders where the property data will appear) and empty states (when an address is not found in the data provider) in your prompt. Real estate apps typically need address autocomplete — describe a combobox or dropdown that suggests addresses as the user types, though the autocomplete data will come from the Google Places API separately. After generating, push to GitHub using V0's Git panel.

Create the Next.js API route that accepts an address query and calls your chosen real estate data API. Using Estated as the example (a clean, beginner-friendly option), the API endpoint is https://apis.estated.com/v4/property with the token and address (in URL-encoded format) as query parameters. Estated returns a response with a data object containing sections for property details (beds, baths, square footage), assessments (tax assessed value), deeds (ownership and sales history), and valuations (AVM estimates). Parse the response and return a normalized object to your frontend. The address should be passed through your API route rather than called directly from the frontend so your API token remains server-side. ATTOM's API uses the GET https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/basicprofile endpoint with the address split into address1 and zipCode parameters, authenticated via the apikey header. Normalize the response shape in your API route so your frontend is decoupled from the specific provider's field names — this makes it easier to switch providers later if needed. Add basic error handling for the common cases: address not found (return 404 with a user-friendly message), invalid address format (return 400 with format guidance), and API quota exceeded (return 429 with an explanation).

1// app/api/property/lookup/route.ts
2import { NextRequest, NextResponse } from 'next/server';
3
4// Using Estated API as example (estated.com)
5const ESTATED_API_BASE = 'https://apis.estated.com/v4';
6
7interface NormalizedProperty {
8  address: {
9    full: string;
10    city: string;
11    state: string;
12    zip: string;
13  };
14  details: {
15    bedrooms: number | null;
16    bathrooms: number | null;
17    squareFeet: number | null;
18    yearBuilt: number | null;
19    lotSizeAcres: number | null;
20    propertyType: string | null;
21  };
22  valuation: {
23    estimatedValue: number | null;
24    estimatedValueLow: number | null;
25    estimatedValueHigh: number | null;
26    lastSalePrice: number | null;
27    lastSaleDate: string | null;
28  };
29  tax: {
30    annualAmount: number | null;
31    assessedValue: number | null;
32    taxYear: number | null;
33  };
34}
35
36export async function GET(request: NextRequest) {
37  const apiToken = process.env.ESTATED_API_TOKEN;
38
39  if (!apiToken) {
40    return NextResponse.json(
41      { error: 'Property data API is not configured' },
42      { status: 500 }
43    );
44  }
45
46  const { searchParams } = new URL(request.url);
47  const address = searchParams.get('address');
48
49  if (!address) {
50    return NextResponse.json(
51      { error: 'address query parameter is required' },
52      { status: 400 }
53    );
54  }
55
56  try {
57    const url = new URL(`${ESTATED_API_BASE}/property`);
58    url.searchParams.set('token', apiToken);
59    url.searchParams.set('combined_address', address);
60
61    const response = await fetch(url.toString(), {
62      headers: { Accept: 'application/json' },
63    });
64
65    if (response.status === 404) {
66      return NextResponse.json(
67        { error: 'Property not found for this address' },
68        { status: 404 }
69      );
70    }
71
72    if (!response.ok) {
73      return NextResponse.json(
74        { error: 'Property data unavailable' },
75        { status: response.status }
76      );
77    }
78
79    const raw = await response.json();
80    const prop = raw.data;
81
82    // Normalize to a consistent shape regardless of provider
83    const normalized: NormalizedProperty = {
84      address: {
85        full: prop?.address?.formatted_street_address ?? address,
86        city: prop?.address?.city ?? '',
87        state: prop?.address?.state ?? '',
88        zip: prop?.address?.zip_code ?? '',
89      },
90      details: {
91        bedrooms: prop?.structure?.bedrooms_count ?? null,
92        bathrooms: prop?.structure?.bathrooms_count ?? null,
93        squareFeet: prop?.structure?.total_area_sq_ft ?? null,
94        yearBuilt: prop?.structure?.year_built ?? null,
95        lotSizeAcres: prop?.parcel?.area_acres ?? null,
96        propertyType: prop?.parcel?.property_type ?? null,
97      },
98      valuation: {
99        estimatedValue: prop?.valuation?.value ?? null,
100        estimatedValueLow: prop?.valuation?.low ?? null,
101        estimatedValueHigh: prop?.valuation?.high ?? null,
102        lastSalePrice: prop?.deeds?.[0]?.sale_price ?? null,
103        lastSaleDate: prop?.deeds?.[0]?.document_date ?? null,
104      },
105      tax: {
106        annualAmount: prop?.taxes?.[0]?.tax_amount ?? null,
107        assessedValue: prop?.assessments?.[0]?.total_value ?? null,
108        taxYear: prop?.assessments?.[0]?.year ?? null,
109      },
110    };
111
112    return NextResponse.json({ property: normalized });
113  } catch (error) {
114    const message = error instanceof Error ? error.message : 'Unknown error';
115    console.error('Property lookup failed:', message);
116    return NextResponse.json(
117      { error: 'Property lookup failed', details: message },
118      { status: 500 }
119    );
120  }
121}

Push your code to GitHub and configure your real estate data API credentials in Vercel. Open the Vercel Dashboard, select your project, and navigate to Settings → Environment Variables. Add the environment variable for your chosen provider — ESTATED_API_TOKEN for Estated, ATTOM_API_KEY for ATTOM, or RENTCAST_API_KEY for RealtyMole/Rentcast. Do not use the NEXT_PUBLIC_ prefix — these API keys are server-side secrets that should never reach the browser. If you use multiple providers (for example, Estated for property details and Rentcast for rental estimates), add all required keys. Set all variables for Production, Preview, and Development environments, then click Save and trigger a redeployment. After deployment, test the property lookup by entering a real US address in your deployed app and verifying the property data card populates correctly. Check Vercel function logs if the API returns errors — common causes are quota limits on the free tier, addresses outside the provider's coverage area, or environment variables not set for the correct environment scope.