Roundhouse

Factline

Use when the user asks if a Dutch address can flood: annual flood probability (any water, over 20, 50 and 200 cm) from Rijkswaterstaat LIWO, 2050 and 2100 climate scenarios, worst-case water depth and ground height vs sea level (AHN). Input: postcode + house number.

OtherLiveeip155:8453Exactvia cdp
https://factline.dev/v1/flood-risk
NetherlandsEuropeFlood-riskClimate-riskInsurance
Calls · 30d
5→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 26 snapshots so far.
$2.11
Verified settled volume
203 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0040
Listed price
As published in the catalog. Always read the live 402 before paying.
5
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-12 00:48Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb58dd178abac67f6d4894437a7fc725cbddb2075

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

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 0.004 USDC via x402. Payment details are in the PAYMENT-REQUIRED header.",
  "preview": "https://factline.dev/v1/flood-risk/preview",
  "price_usdc": "0.004",
  "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.

0.004USDC≈ $0.004 USD
on Base · exact scheme

Pay 0.004 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
4000 smallest units
4000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

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": "4000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "fyqifu7otDYanhqr84B9YzZfA5LwRTJ1uFLqDJinMTK",
    "amount": "4000",
    "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": {
          "source": "Rijkswaterstaat LIWO (basisinformatie-overstromingen.nl), AHN via PDOK",
          "address": {
            "lat": 52.08359668,
            "lon": 4.29193161,
            "city": "'s-Gravenhage",
            "label": "Laan van Meerdervoort 100, 2517AS 's-Gravenhage",
            "postcode": "2517AS",
            "house_number": 100
          },
          "summary": "Chance of flooding deeper than 50 cm: less than 1 in 30,000 per year (extremely small). Worst modelled water depth: 1.44 m.",
          "ground_height": {
            "metres_nap": 1.44,
            "below_sea_level": false
          },
          "flood_probability_today": {
            "any_water": {
              "class": 1,
              "label": "extremely small",
              "annual": "less than 1 in 30,000 per year"
            },
            "over_20_cm": {
              "class": 1,
              "label": "extremely small",
              "annual": "less than 1 in 30,000 per year"
            },
            "over_50_cm": {
              "class": 1,
              "label": "extremely small",
              "annual": "less than 1 in 30,000 per year"
            },
            "over_200_cm": {
              "class": 0,
              "label": "not exposed",
              "annual": "none modelled"
            }
          },
          "worst_case_max_water_depth_m": 1.44,
          "flood_probability_over_50_cm_future": {
            "2050": {
              "class": 2,
              "label": "very small",
              "annual": "1 in 3,000 to 1 in 30,000 per year"
            },
            "2100": {
              "class": 2,
              "label": "very small",
              "annual": "1 in 3,000 to 1 in 30,000 per year"
            }
          }
        }
      }
    },
    "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 00:48Z
Last indexed by Roundhouse
2026-10-26 15:00Z
Last enriched (probe, favicon, geo)
2026-10-08 04:16Z
x402 version
2
Max timeout
120s
Liveness probe
HTTP 402
Report

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. 26 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show 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/flood-risk, 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.