# Spain House Price Index by Region API

> Spain House Price Index by Region API is a paid API for AI agents from rent-check-production.up.railway.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-19).

Returns Spanish residential property price index data (level, quarterly change, annual change) by national or autonomous community region, sourced from INE.

## Facts

- Endpoint: GET https://rent-check-production.up.railway.app/v1/es-house-prices?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spain-house-price-index-by-region-api-072a87df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NLPa5od6Am95fZgc7yzud

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 spain-house-price-index-by-region-api-072a87df
```

Example prompt: What's the current house price index for Madrid, including the latest quarterly and annual percentage changes?

## When to prefer this

Use this endpoint when you need official Spanish residential property price index data from INE, broken down by autonomous community or nationally, with quarterly and multi-year trend percentages. Prefer this over general real estate listing APIs when you need macroeconomic benchmark data rather than individual property prices.

## Known failure modes

- Invalid or misspelled region name returns empty or null region data
- Data may lag by one quarter if INE has not yet published the latest release
- National-only data returned if region parameter is omitted
- Service downtime on Railway hosting may cause 5xx errors

## How this service works

What is the average rent in an Irish area? What is the rent increase limit? What are house prices in a county? Pay-per-call Irish rent and property price data for agents and developers. x402 and MPP, MCP server, no API keys.

## Output

A JSON object containing the country code (ES), a breakdown by region (Nacional or named autonomous community), and for each region: the house price index level, the percentage change over the last 4 quarters, the percentage change over the last 12 quarters, and the latest quarter covered. Also includes an INE attribution string.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "region": {
       "type": "string",
       "description": "Optional: national or an autonomous community, e.g. madrid"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "country": "ES",
  "regions": {
   "Nacional": {
    "general": {
     "index": 186.75,
     "change_4q_pct": 12.9,
     "change_12q_pct": 36.1,
     "latest_quarter": "2025Q4"
    }
   }
  },
  "latest_quarter": "2025Q4",
  "attribution_raw": "Fuente: Sitio web del INE: www.ine.es"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/spain-house-price-index-by-region-api-072a87df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rent-check-production.up.railway.app](https://www.zero.xyz/host/rent-check-production.up.railway.app/llms.txt)