Jp Crypto Tax Rules

io.github.kodandy由 GitHub 帳號 kodandy 發布v0.1.0更新於 Oct 24, 2026

Machine-readable Japanese crypto-asset tax rules for AI agents: rules-as-code with citations, x402.

已驗證Streamable HTTP可網頁執行金融知識與記憶

概覽

AI 產生的概覽

遠端 MCP 伺服器，為助理提供結構化、附法條引用的日本加密資產稅務規則、參數與情境規則包。

可以做什麼
  • 依類別、納稅人身分與課稅年度瀏覽並篩選日本加密資產稅務規則目錄
  • 讀取單一規則的完整內容，包括規則陳述、例外、狀態、生效日期與法定引用
  • 取得稅率參數，例如所得稅累進級距、居民稅與復興附加稅數字、2028 年改革稅率及申報門檻
  • 取得依情境整理的規則包，涵蓋 DeFi 質押、海外交易所、法人持有與 2028 年過渡
適用情境
當助理需要回答日本加密資產稅務問題，並希望以附法條引用的結構化規則為依據（包含現行制度與待生效的 2028 年改革）時適用。
執行需求
需要遠端 Streamable HTTP 端點；無需 API 金鑰，也無需 initialize 握手。付費規則包工具需透過 x402 以 Base 上的 USDC 付款（目前封測期間為測試網）。
安裝前請注意
付費規則包每次呼叫收費 0.05 USDC，會完成真實的 x402 付款。內容為一般性稅制資訊，並非稅務建議，也不針對個人情況；應核對原始資料。伺服器處於封閉封測階段，規則、範圍與定價可能變動。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Jp Crypto Tax Rules，將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Web executable，透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式，或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南，先向你展示發布者、端點和登入方式，經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/io.github.kodandy%2Fjp-crypto-tax-rules/install.md，並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前，先告訴我它的發布者、端點和登入方式，等我確認。不要把 API 金鑰寫進命令或我會提交的檔案；問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "jp-crypto-tax-rules": {
      "type": "http",
      "url": "https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp"
    }
  }
}

README

JP Crypto Tax Rules — MCP Server

Remote MCP server exposing machine-readable rules-as-code for Japanese crypto-asset taxation to AI agents — structured rules with statutory citations, tax parameters, and the current-vs-2028-reform transition logic. Built from public sources only.

Not tax advice. This is general tax-system information served as structured rules with citations. It does not respond to individual circumstances and is not a substitute for advice from a licensed tax professional (税理士). Always verify against primary sources.

ToolPricingReturns
list_tax_rulesFreeRule catalog, filterable by category / taxpayer / tax_year (resolves the applicable epoch)
get_tax_ruleFreeOne rule in full: statement, exceptions, statutory citations, sources
get_tax_parametersFreeTax-rate tables and thresholds with sources (income brackets, 20.315% breakdown, filing threshold)
get_rule_pack0.05 USDC (x402)Scenario-curated bundle: defi_staking, overseas_exchange, corporate_holding, transition_2028

The paid tool genuinely fulfills: a settled x402 payment returns the rule pack itself, not a placeholder.

Connect

bash
claude mcp add --transport http jp-crypto-tax https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp
json
{  "mcpServers": {    "jp-crypto-tax": {      "type": "streamable-http",      "url": "https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp"    }  }}

No API key and no initialize handshake required. USDC on Base (testnet during the current private beta).

Scope & sources

  • Epochs: current regime (miscellaneous income, total-average / moving-average cost basis, through FY2027 returns) and the FY2026 reform (20.315% separate taxation, 3-year loss carryforward) marked enacted_pending until the enforcement date is fixed.
  • Sources: 国税庁 暗号資産FAQ (令和7年12月版), the relevant 所得税法 / 法人税法 / 消費税法 provisions via e-Gov, and the 令和8年度税制改正大綱. Every rule carries its own citations.
  • Status: closed private beta. Rules, scope and pricing may change. Source of the gateway lives in a private repository; this repo hosts the public MCP documentation and registry manifest.

License

MIT

來源：README.md，提交 1b0e7bf

工具

4

list_tax_rules

List structured Japanese crypto tax rules

FREE — returns structured rules. Catalog of machine-readable Japanese crypto-asset tax rules (rules-as-code): titles, status (current / enacted_pending), effective dates and statutory citations, filterable by category, taxpayer and tax_year. tax_year resolves the current-vs-2028-reform epoch per rule (applies / pending_enforcement). Sources are public only (NTA FAQ, e-Gov statutes, MOF documents); not tax advice. 一般的な税制情報の提供であり、個別の税務判断は税理士にご相談ください。

輸入參數categorytax_yeartaxpayer

get_tax_rule

Full structured rule record (rule_id lookup)

FREE — returns one full structured rule: statement, exceptions, status, effective dates, machine tags and statutory citations (sources), served verbatim from the versioned rules corpus. Not tax advice. 一般的な税制情報の提供であり、個別の税務判断は税理士にご相談ください。

輸入參數rule_id必填

get_tax_parameters

Japanese tax parameters (brackets, rates, thresholds)

FREE — returns structured tax parameters with per-value sources: progressive income tax brackets, resident tax and reconstruction surtax figures, the 2028-reform separate-taxation rate and loss-carryforward years, and the salary-filer filing threshold. Approximate reference values from public sources; not tax advice. 一般的な税制情報の提供であり、個別の税務判断は税理士にご相談ください。

輸入參數tax_year

get_rule_pack

Curated scenario rule pack (x402 metered)

Scenario-curated bundle of full structured rules (statements, citations, parameters) for one use case: defi_staking | overseas_exchange | corporate_holding | transition_2028. Paid via x402: each call costs 0.05 USDC. This tool returns the HTTP 402 payment challenge (spec-conformant accepts list) for the pack resource. The 402 is real: settle it against /v1/packs/{scenario} with an X-PAYMENT header and the 200 response delivers the full pack body ({status:"settled", settlement, pack}) — payment buys the actual structured rules, not a receipt. Not tax advice. 一般的な税制情報の提供であり、個別の税務判断は税理士にご相談ください。

輸入參數scenario必填

版本歷史

1
  1. v0.1.0最新Sep 16, 2026

評分

已滿足適用檢查項的 100%

該評分衡量此收錄條目的完整程度，依據註冊中心條目、端點與公開來源計算得出。它不是對伺服器本身的評價，也不表示伺服器安全或目前可用：可連通性是帶日期的檢查結果，評分也不包含安裝量或使用者評價。

  • 近 30 天內可連通必需25 分
  • 已宣告認證方式必需10 分
  • 已列出工具必需15 分
  • 描述必需15 分
  • 圖示10 分
  • 文件15 分
  • 授權條款10 分