United States House Price Index
Long-run US home price trends for the nation, states and metro areas.
The government house price index from the Federal Housing Finance Agency, tracking repeat-sale home price changes back to the 1970s at national, census division, state and metro level, with seasonally adjusted and unadjusted values. Proptech, mortgage, real-estate investment and AI research agents use it to benchmark home values.
Source: Federal Housing Finance Agency - House Price Index Master File · Public Domain (U.S. Government Work) · Source: U.S. Federal Housing Finance Agency, House Price Index.
Endpoints
Every request is authenticated with your X-API-Key and counted against your plan.
- GET /v1/data/united-states-house-price-index
- GET /v1/data/united-states-house-price-index/search?q=...
- GET /v1/data/united-states-house-price-index/{key}
Base path /v1/data/united-states-house-price-index · full reference in the interactive docs. Also exposed as an MCP tool for AI agents.
Fields
| Field | Type | Description |
|---|---|---|
| hpi_type | str | Index type (e.g. traditional, distress-free) |
| hpi_flavor | str | Purchase-only, all-transactions, expanded-data |
| frequency | str | monthly or quarterly |
| level | str | Geography level (USA, State, MSA, Census Division) |
| place_name | str | Geography name |
| place_id | str | Geography code |
| year | int | Year |
| period | int | Month or quarter number |
| index_nsa | float | Index, not seasonally adjusted |
| index_sa | float | Index, seasonally adjusted |
What you get
FAQ
- Is this an actual price in dollars?
- No. It is an index of repeat-sale price changes; compare values over time to get percentage changes.
- How often is it updated?
- Monthly series update monthly and quarterly series update quarterly.
Pricing
Simple, transparent pricing
Start free, upgrade when you need more. All plans include full API access.
Free
Get started and explore the API
- 100 API requests per day
- All endpoints included
- Community support
Pro
For production apps and AI agents
- 10,000 API requests per day
- All endpoints included
- Priority support
- Usage dashboard
Enterprise
Unlimited access for high-volume use
- Unlimited API requests
- All endpoints included
- Priority support
- Usage dashboard
- Dedicated support channel
Getting Started
Start building in minutes
Register for a free API key, make your first request, and upgrade when you're ready.
Register
Create an account to get your API key. It's free — no credit card required.
curl -X POST https://api.aristocles.com.au/v1/auth/register \
-H "Content-Type: application/json" \
-d '{"email": "you@example.com", "name": "Your Name"}'Make a request
Use your API key in the X-API-Key header to authenticate requests.
curl https://api.aristocles.com.au/v1/data/asx \
-H "X-API-Key: your_api_key_here"Upgrade
Need more requests? Upgrade to Pro or Enterprise — you'll be redirected to Stripe Checkout.
curl -X POST "https://api.aristocles.com.au/v1/billing/checkout?tier=pro" \
-H "X-API-Key: your_api_key_here"Check usage
Monitor your daily request count and remaining quota at any time.
curl https://api.aristocles.com.au/v1/usage \
-H "X-API-Key: your_api_key_here"