How to Integrate Buildium with V0

Open V0 at v0.dev and describe the property management interface you want to build. Buildium integrations typically center around a dashboard that shows property portfolio metrics, a tenant table, or a maintenance request board. Being specific about the data fields you want to display helps V0 generate components that match Buildium's actual API response shapes, reducing the amount of manual adjustment needed later. For a property portfolio dashboard, describe the card or table layout, the key metrics to show (occupancy, rent totals, unit counts), and any filtering or search functionality. For a tenant directory, describe the table columns, status badges, and any expandable detail panels. V0 generates React components with Tailwind CSS and shadcn/ui components like Card, Table, Badge, and Progress — these map well to property management UIs. Tell V0 which API route paths you plan to use (e.g., /api/buildium/properties, /api/buildium/tenants) so the generated components call the right endpoints. After V0 generates the UI, use the Git panel to push it to your GitHub repository and continue to the next step. You can also use V0's preview to verify the layout looks right with placeholder data before wiring up real API calls.

Buildium's API uses OAuth2 client credentials flow — your app sends its Client ID and Client Secret to Buildium's token endpoint to receive a short-lived access token. This token is then included as a Bearer token in all subsequent API requests. Since Buildium access tokens expire after a set period, your API route should implement simple in-memory token caching to avoid re-authenticating on every request. In a serverless environment like Vercel, module-level variables persist within a single function instance but reset between cold starts — this is acceptable for token caching since expired tokens simply trigger a fresh authentication on the next request. Create a helper module for the Buildium authentication logic and a main API route for fetching properties. The Buildium API base URL is https://api.buildium.com/api/v1. Key endpoints include GET /rentals for residential properties, GET /rentals/{id}/units for units within a property, GET /rentals/tenants for tenant listing, GET /rentals/leases for lease data, and GET /maintenance/requests for maintenance tickets. Buildium returns paginated results using pagesize and pageNumber query parameters, with a total count in response headers. Your API route should pass through pagination parameters from the frontend query string so the dashboard can implement infinite scroll or page navigation.

1// app/api/buildium/properties/route.ts
2import { NextRequest, NextResponse } from 'next/server';
3
4const BUILDIUM_API_BASE = 'https://api.buildium.com/api/v1';
5const BUILDIUM_TOKEN_URL = 'https://api.buildium.com/api/v1/oauth/token';
6
7interface BuildiumToken {
8  access_token: string;
9  expires_at: number;
10}
11
12// Module-level token cache — persists within a serverless function instance
13let cachedToken: BuildiumToken | null = null;
14
15async function getBuildiumToken(): Promise<string> {
16  // Return cached token if still valid (with 60s buffer)
17  if (cachedToken && cachedToken.expires_at > Date.now() + 60_000) {
18    return cachedToken.access_token;
19  }
20
21  const clientId = process.env.BUILDIUM_CLIENT_ID;
22  const clientSecret = process.env.BUILDIUM_CLIENT_SECRET;
23
24  if (!clientId || !clientSecret) {
25    throw new Error('BUILDIUM_CLIENT_ID and BUILDIUM_CLIENT_SECRET must be set');
26  }
27
28  const response = await fetch(BUILDIUM_TOKEN_URL, {
29    method: 'POST',
30    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
31    body: new URLSearchParams({
32      grant_type: 'client_credentials',
33      client_id: clientId,
34      client_secret: clientSecret,
35    }),
36  });
37
38  if (!response.ok) {
39    throw new Error(`Buildium auth failed: ${response.status} ${response.statusText}`);
40  }
41
42  const data = await response.json();
43  cachedToken = {
44    access_token: data.access_token,
45    expires_at: Date.now() + data.expires_in * 1000,
46  };
47
48  return cachedToken.access_token;
49}
50
51export async function GET(request: NextRequest) {
52  try {
53    const token = await getBuildiumToken();
54    const { searchParams } = new URL(request.url);
55    const pageSize = searchParams.get('pagesize') || '50';
56    const pageNumber = searchParams.get('pageNumber') || '1';
57
58    const response = await fetch(
59      `${BUILDIUM_API_BASE}/rentals?pagesize=${pageSize}&pageNumber=${pageNumber}`,
60      {
61        headers: {
62          Authorization: `Bearer ${token}`,
63          'Content-Type': 'application/json',
64        },
65      }
66    );
67
68    if (!response.ok) {
69      throw new Error(`Buildium API error: ${response.status}`);
70    }
71
72    const properties = await response.json();
73    const totalCount = response.headers.get('X-Total-Count');
74
75    return NextResponse.json({ properties, totalCount: Number(totalCount) || 0 });
76  } catch (error) {
77    const message = error instanceof Error ? error.message : 'Unknown error';
78    console.error('Buildium properties fetch failed:', message);
79    return NextResponse.json({ error: message }, { status: 500 });
80  }
81}

With the authentication pattern established, extend the integration by adding API routes for tenant data and maintenance requests. These routes follow the same structure as the properties route — obtain a Buildium token, make an authenticated GET request to the appropriate Buildium endpoint, and return the normalized data to the frontend. For tenants, use the /rentals/tenants endpoint which returns current tenants with their associated lease and unit information. The response includes the tenant's name, email, phone, and the leaseId linking to their rental agreement. For lease details including start date, end date, and monthly rent, make a separate request to /rentals/leases with the leaseId. For maintenance requests, use the /maintenance/requests endpoint which returns requests with status (New, InProgress, Completed), priority level, description, property, unit, and assigned vendor information. Add query parameter pass-through for filtering by status or property ID so the frontend maintenance board can filter without fetching all records. Create each route as a separate file under app/api/buildium/ to keep the code organized. If your dashboard needs aggregated data (like combining property, unit, and occupancy data in a single request to minimize frontend round trips), create a dedicated /api/buildium/summary route that makes multiple Buildium API calls server-side and combines the results before returning.

1// app/api/buildium/tenants/route.ts
2import { NextRequest, NextResponse } from 'next/server';
3
4const BUILDIUM_API_BASE = 'https://api.buildium.com/api/v1';
5
6// Import shared auth from your lib/buildium.ts
7async function getBuildiumToken(): Promise<string> {
8  const clientId = process.env.BUILDIUM_CLIENT_ID!;
9  const clientSecret = process.env.BUILDIUM_CLIENT_SECRET!;
10  const response = await fetch('https://api.buildium.com/api/v1/oauth/token', {
11    method: 'POST',
12    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
13    body: new URLSearchParams({
14      grant_type: 'client_credentials',
15      client_id: clientId,
16      client_secret: clientSecret,
17    }),
18  });
19  const data = await response.json();
20  return data.access_token;
21}
22
23export async function GET(request: NextRequest) {
24  try {
25    const token = await getBuildiumToken();
26    const { searchParams } = new URL(request.url);
27    const propertyId = searchParams.get('propertyId');
28    const pageSize = searchParams.get('pagesize') || '100';
29
30    const url = new URL(`${BUILDIUM_API_BASE}/rentals/tenants`);
31    url.searchParams.set('pagesize', pageSize);
32    if (propertyId) url.searchParams.set('propertyIds', propertyId);
33
34    const response = await fetch(url.toString(), {
35      headers: { Authorization: `Bearer ${token}` },
36    });
37
38    if (!response.ok) {
39      throw new Error(`Buildium tenants error: ${response.status}`);
40    }
41
42    const tenants = await response.json();
43    return NextResponse.json({ tenants });
44  } catch (error) {
45    const message = error instanceof Error ? error.message : 'Unknown error';
46    return NextResponse.json({ error: message }, { status: 500 });
47  }
48}

Push your code to GitHub and configure Buildium credentials in Vercel before deploying. Open the Vercel Dashboard, select your project, and navigate to Settings → Environment Variables. Add BUILDIUM_CLIENT_ID with your Buildium API Client ID — this is found in your Buildium account under Settings → API → API Keys. Add BUILDIUM_CLIENT_SECRET with the corresponding client secret. Neither variable should use the NEXT_PUBLIC_ prefix since both are server-only secrets that must never reach the browser. If your dashboard is tenant-facing or owner-facing and needs to scope data to specific properties, you can add a BUILDIUM_DEFAULT_PROPERTY_ID variable to filter results by default. Set all variables for Production, Preview, and Development environments, then save and trigger a redeployment. For local testing, add the same variables to .env.local in your project root — Next.js reads this file automatically during npm run dev. After deploying, open your live Vercel URL and verify that the property cards populate with real Buildium data. If you encounter CORS errors, they indicate your frontend is calling Buildium directly instead of through your API route — all Buildium API calls must go through server-side routes. For complex multi-property setups or white-labeled property portals, RapidDev's team can help architect the multi-tenant data isolation layer.