Roundhouse

gapfill

Japanese business days: the date N business days from a date (with resultIsHoliday), business days between two dates, whether a date is a business day with the previous and next, or a year's holidays. National holidays by the Act on National Holidays with substitute and citizens' holidays and equinox days; options for the December 29 to January 3 break, bank holidays and Saturday as a business day. For settlement dates and deadlines in Japan. Each answer names its rule source.

OtherUnknowneip155:8453Exactvia cdp
https://jotowl.com/v1/business-days/jp
Business daysJapanJapanese holidaysWorking daysBank holidays
Settlements · 30d
17
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.07
Verified settled volume
17 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-26 10:38Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x91A71892231A256d69d4bf8a442234701a762AaF

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.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0x91A7…62AaF. The signed payment is good for 5 minutes.

Paid to
0x91A7…62AaF
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x91A71892231A256d69d4bf8a442234701a762AaF",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "add": 5,
          "from": "2026-07-17"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "from": "2026-07-17",
          "mode": "add",
          "notes": [],
          "result": "2026-07-27",
          "calendar": {
            "id": "JP",
            "name": "Japan: national holidays (国民の祝日)",
            "years": {
              "last": 2099,
              "first": 2020
            },
            "source": {
              "url": "https://www8.cao.go.jp/chosei/shukujitsu/gaiyou.html",
              "name": "Act on National Holidays (国民の祝日に関する法律); equinoxes by NAOJ's formula",
              "licence": "Computed from the rules; dates and rules are facts, not licensed material"
            },
            "weekend": [
              "Saturday",
              "Sunday"
            ]
          },
          "convention": "Counts business days after from (from itself is not counted), as spreadsheet WORKDAY does; a negative add counts back.",
          "calendarDays": 10,
          "resultWeekday": "Monday",
          "addBusinessDays": 5,
          "holidaysSkipped": [
            {
              "date": "2026-07-20",
              "name": "Marine Day",
              "weekday": "Monday",
              "localName": "海の日"
            }
          ],
          "resultIsHoliday": null,
          "fromIsBusinessDay": true
        }
      }
    },
    "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",
              "required": [],
              "properties": {
                "to": {
                  "type": "string",
                  "description": "End date YYYY-MM-DD: counts business days from from"
                },
                "tz": {
                  "type": "string",
                  "description": "IANA time zone that \"today\" is read in (default: the calendar's)"
                },
                "add": {
                  "type": "integer",
                  "description": "Business days to add to from (negative counts back)"
                },
                "date": {
                  "type": "string",
                  "description": "One date YYYY-MM-DD to check"
                },
                "from": {
                  "type": "string",
                  "description": "Start date YYYY-MM-DD, or \"today\""
                },
                "year": {
                  "type": "integer",
                  "description": "A year: lists its holidays"
                },
                "weekend": {
                  "type": "string",
                  "description": "Weekend days, comma-separated (default \"sat,sun\"; \"fri,sat\"; \"none\")"
                },
                "calendar": {
                  "enum": [
                    "JP",
                    "JP-GOV",
                    "JP-BANK"
                  ],
                  "type": "string",
                  "description": "JP (default): national holidays. JP-GOV adds December 29 to January 3; JP-BANK adds December 31, January 2 and 3"
                },
                "saturday_off": {
                  "type": "boolean",
                  "description": "false makes Saturday a business day"
                },
                "new_year_break": {
                  "type": "boolean",
                  "description": "Adds December 29 to January 3, as government offices close (JP-GOV)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "calendar",
                "mode",
                "notes"
              ],
              "properties": {
                "to": {
                  "type": "string"
                },
                "from": {
                  "type": "string"
                },
                "mode": {
                  "enum": [
                    "add",
                    "count",
                    "check",
                    "year"
                  ],
                  "type": "string"
                },
                "notes": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                },
                "result": {
                  "type": "string"
                },
                "calendar": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string"
                    },
                    "name": {
                      "type": "string"
                    },
                    "years": {
                      "type": "object"
                    },
                    "source": {
                      "type": "object"
                    },
                    "weekend": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    }
                  }
                },
                "holidays": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "date": {
                        "type": "string"
                      },
                      "name": {
                        "type": "string"
                      },
                      "weekday": {
                        "type": "string"
                      },
                      "localName": {
                        "type": "string"
                      },
                      "observedFrom": {
                        "type": "string"
                      }
                    }
                  }
                },
                "businessDays": {
                  "type": "integer"
                },
                "isBusinessDay": {
                  "type": "boolean"
                },
                "addBusinessDays": {
                  "type": "integer"
                },
                "holidaysSkipped": {
                  "type": "array"
                },
                "nextBusinessDay": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "null after the years covered"
                },
                "resultIsHoliday": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "The holiday on result (its Japanese name), or null; only add=0 can land on one"
                },
                "previousBusinessDay": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "null before the years covered"
                },
                "businessDaysInclusive": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 10:38Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
—
x402 version
2
Max timeout
300s
Liveness probe
Not probed
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 gapfill 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=gapfill'
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://jotowl.com/v1/business-days/jp, 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.