Estimate the market value of a French property from its address and surface area
Estimate the market value of a French property from its address and surface area, using actual recorded sale prices from the DVF open dataset rather than asking-price listings. Returns an estimated value, the local median price per square metre and the sample size behind it, so an agent can judge how reliable the figure is.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
267 msmedian answer time
$0.05listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.x-402.online/v1/fr/estimation-immo
| Category | Market data |
|---|---|
| Provider host | api.x-402.online |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 267 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"adresse": "10 rue de Rivoli Paris",
"surface": "50",
"type": "appartement"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}