# FHFA House Price Index by Geography

> FHFA House Price Index by Geography is a paid API for AI agents from webtools402.176-109-107-191.sslip.io, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-14).

Returns the FHFA House Price Index for a US geography, including current index level, year-over-year, quarter-over-quarter, and 5-year growth rates, momentum flags, and recent history.

## Facts

- Endpoint: GET https://webtools402.176-109-107-191.sslip.io/realestate/prices
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fhfa-house-price-index-by-geography-e9f59de0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DXqwM4VVRKAGA5P8nw8vC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fhfa-house-price-index-by-geography-e9f59de0
```

Example prompt: What's the current FHFA house price index for the Austin-Round Rock metro area, including year-over-year and 5-year growth, and can you show me the last 8 quarters of history?

## When to prefer this

Use this endpoint when you need official US housing price index data from the FHFA, including growth rates and momentum at the state or metro CBSA level. Prefer this over proprietary or estimated HPI sources when government-sourced, public domain data is required. Ideal for real estate market analysis, mortgage underwriting research, or economic trend monitoring across US geographies.

## Known failure modes

- Invalid or unrecognized geo input returns an error or empty result
- Non-US geographies are not supported
- County FIPS and ZIP codes resolve to state-level only, not local precision
- Range parameter out of bounds (must be 1–40) returns a validation error
- Ambiguous geo string without a type hint may resolve to unexpected geography

## How this service works

The FHFA House Price Index for a geography: the current index level plus year over year, quarter over quarter and five year growth, with momentum flags and a short history. State and metro CBSA levels are covered directly; county and ZIP resolve to the state level index. Public domain, US only.

## Output

Returns the current FHFA HPI index level for the requested geography, plus year-over-year, quarter-over-quarter, and 5-year percentage growth figures, momentum flags indicating direction, and a short time series of recent index observations. County and ZIP inputs resolve to state-level data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "geo"
     ],
     "properties": {
      "geo": {
       "type": "string",
       "description": "A state, metro CBSA code, county FIPS, ZIP, or address"
      },
      "type": {
       "enum": [
        "auto",
        "state",
        "county",
        "cbsa",
        "zip",
        "address"
       ],
       "type": "string",
       "description": "How to read geo (auto reads a 5-digit number as a ZIP)"
      },
      "range": {
       "type": "integer",
       "maximum": 40,
       "minimum": 1,
       "description": "Most recent N index observations of history"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhfa-house-price-index-by-geography-e9f59de0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from webtools402.176-109-107-191.sslip.io](https://www.zero.xyz/host/webtools402.176-109-107-191.sslip.io/llms.txt)