Roundhouse

TariffMonkee

Small, single-purpose web data APIs that AI agents pay for per call in USDC over the x402 protocol (HTTP 402). No accounts, no API keys, no subscriptions.

OtherLiveeip155:8453Exactvia cdp
https://tariffmonkee.com/paid/tw-business-day-check
TaiwanHolidaysBusiness-daysCalendar
Calls · 30d
3
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far.
$8.72
Verified settled volume
186 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-24 22:08Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x0FAD15c9f4C38f439fd56C4d4e4Bc8fC71c42767

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.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x0FAD15c9f4C38f439fd56C4d4e4Bc8fC71c42767",
      "amount": "5000",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://tariffmonkee.com/paid/tw-business-day-check",
      "description": "Taiwan business day check from the ROC government office calendar (via the TaiwanCalendar project): whether a date is a business day, with weekends and public holidays counted as non-business days, and optionally the business-day count across a range. Covers about 2017 onward; dates outside coverage return a clear not-found error.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "EjwKsavtpL4MeboquZgFerQy6voUbKqJv5TyukEH8vPN",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana-mainnet",
      "mimeType": "application/json",
      "resource": "https://tariffmonkee.com/paid/tw-business-day-check",
      "description": "Taiwan business day check from the ROC government office calendar (via the TaiwanCalendar project): whether a date is a business day, with weekends and public holidays counted as non-business days, and optionally the business-day count across a range. Covers about 2017 onward; dates outside coverage return a clear not-found error.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x0FAD…42767. The signed payment is good for 5 minutes.

Paid to
0x0FAD…42767
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
5000units
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
EjwKsa…H8vPN
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x0FAD15c9f4C38f439fd56C4d4e4Bc8fC71c42767",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
    },
    "payTo": "EjwKsavtpL4MeboquZgFerQy6voUbKqJv5TyukEH8vPN",
    "amount": "5000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "date": "2026-10-10"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "date": {
            "date": "2026-10-10",
            "week": "六",
            "is_holiday": true,
            "description": "國慶日",
            "is_business_day": false
          },
          "range": null,
          "sources": [
            {
              "url": "https://github.com/ruyut/TaiwanCalendar",
              "name": "TaiwanCalendar (ruyut/TaiwanCalendar)"
            },
            {
              "url": "https://data.gov.tw/dataset/14718",
              "name": "政府資料開放平台 -- 中華民國政府行政機關辦公日曆表"
            }
          ],
          "data_note": "Only 'is_holiday' (and the derived 'is_business_day') should be used for logic. 'description' is passed through as-is from the source dataset and is known to be worded inconsistently across years (e.g. adjusted-workday entries read '調整上班' for 2017-2020 but '補行上班' from 2021 onward) -- do not pattern-match on it.",
          "disclaimer": "Informational only, not an official determination. Where this disagrees with a government announcement, the announcement is authoritative -- holiday schedules can change after this dataset is published.",
          "attribution": "Data via the TaiwanCalendar open-source project (github.com/ruyut/TaiwanCalendar), itself republishing 政府資料開放平台 (data.gov.tw)'s official 中華民國政府行政機關辦公日曆表. Licensed CC BY 4.0 / Government Open Data License v1.",
          "verified_on": "2026-10-18"
        }
      }
    },
    "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": [
                "date"
              ],
              "properties": {
                "date": {
                  "type": "string",
                  "description": "Date to check, format YYYY-MM-DD."
                },
                "range_end": {
                  "type": "string",
                  "description": "If provided, also returns a business-day count and holiday list for the range from 'date' to this date, inclusive. Must span at most 2 calendar years."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "date",
                "data_note",
                "attribution",
                "disclaimer",
                "sources",
                "verified_on"
              ],
              "properties": {
                "date": {
                  "type": "object",
                  "required": [
                    "date",
                    "week",
                    "is_holiday",
                    "is_business_day",
                    "description"
                  ],
                  "properties": {
                    "date": {
                      "type": "string"
                    },
                    "week": {
                      "type": "string"
                    },
                    "is_holiday": {
                      "type": "boolean"
                    },
                    "description": {
                      "type": "string"
                    },
                    "is_business_day": {
                      "type": "boolean"
                    }
                  }
                },
                "range": {},
                "sources": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "name",
                      "url"
                    ],
                    "properties": {
                      "url": {
                        "type": "string"
                      },
                      "name": {
                        "type": "string"
                      }
                    }
                  }
                },
                "data_note": {
                  "type": "string"
                },
                "disclaimer": {
                  "type": "string"
                },
                "attribution": {
                  "type": "string"
                },
                "verified_on": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Provenance

Seen in the source catalog
2026-10-24 22:08Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-18 08:15Z
x402 version
2
Max timeout
300s
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. 12 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 TariffMonkee 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=TariffMonkee'
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://tariffmonkee.com/paid/tw-business-day-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.