Factline
Use when a tenant asks if their Dutch rent is too high or what the maximum rent is: estimated rent points (WWS) from floor area, energy label and neighbourhood WOZ, the likely segment (social up to 143 points, middle 144-186, free 187+) and the approximate maximum basic rent (2026 limits). An estimate with a link to the official check. Input: postcode + house number.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": "/llms.txt",
"error": "payment_required",
"message": "This costs 0.01 USDC via x402. Payment details are in the PAYMENT-REQUIRED header.",
"preview": "https://factline.dev/v1/rent-check/preview",
"price_usdc": "0.01",
"preview_hint": "Free: call the preview with the same query parameters to check your input and see what the paid answer contains before paying."
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.01 USDC on Base to 0xb58d…b2075. The signed payment is good for 2 minutes.
- Paid to
- 0xb58d…b2075
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 10000 smallest units
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- fyqifu…inMTK
- Token contract
- EPjFWd…TDt1v
- Payment window
- 2 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb58dd178abac67f6d4894437a7fc725cbddb2075",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"payTo": "fyqifu7otDYanhqr84B9YzZfA5LwRTJ1uFLqDJinMTK",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"postcode": "2517AS",
"house_number": 100
}
},
"output": {
"type": "json",
"example": {
"points": {
"low": 140,
"high": 179
},
"address": {
"city": "'s-Gravenhage",
"label": "Laan van Meerdervoort 100, 2517AS 's-Gravenhage",
"postcode": "2517AS",
"house_number": 100
},
"segment": {
"certain": false,
"explained": "Middle rent (middenhuur): 144 to 186 points.",
"most_likely": "middle",
"low_estimate": "social",
"high_estimate": "middle"
},
"summary": "Estimated 140 to 179 rent points: on the border between social rent and middle rent (most likely middle rent). The exact kitchen, bathroom and outdoor space decide it.",
"breakdown": {
"heating": {
"low": 6,
"high": 10
},
"kitchen": {
"low": 4,
"high": 7
},
"sanitary": {
"low": 8,
"high": 11
},
"woz_value": {
"low": 25.75,
"high": 38.5,
"basis": "estimated WOZ EUR 237,000 to 355,000 from the neighbourhood average",
"capped_at_33_percent": false
},
"floor_area": {
"low": 71.25,
"high": 74,
"basis": "75 m2 usable floor area (BAG)"
},
"energy_label": {
"low": 30,
"high": 30,
"basis": "label B, multi-family table"
},
"outdoor_space": {
"low": -5,
"high": 8
}
},
"official_check": "https://www.huurcommissie.nl/huurprijscheck",
"thresholds_2026": {
"middle_max_points": 186,
"social_max_points": 143,
"middle_max_rent_eur": 1228.07,
"social_max_rent_eur": 932.93
},
"max_rent_eur_per_month": {
"low": 912.34,
"high": 1178.31,
"note": "Maximum basic rent (kale huur) for the points, excluding service costs."
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"q": {
"type": "string",
"description": "Alternative to postcode: free-text address, e.g. 'Visschersplein 1 Utrecht'"
},
"addition": {
"type": "string",
"description": "Optional house number addition, e.g. 2 or BIS"
},
"postcode": {
"type": "string",
"pattern": "^[1-9][0-9]{3} ?[A-Za-z]{2}$",
"description": "Dutch postcode, 4 digits + 2 letters, e.g. 3511LX"
},
"house_letter": {
"type": "string",
"description": "Optional house letter, e.g. A"
},
"house_number": {
"type": "integer",
"minimum": 1,
"description": "House number, e.g. 1"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-12 00:49Z
- Last indexed by Roundhouse
- 2026-10-26 20:10Z
- Last enriched (probe, favicon, geo)
- 2026-10-11 01:46Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Factline and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Factline' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://factline.dev/v1/rent-check, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.