Machine-readable Japanese crypto-asset tax rules for AI agents: rules-as-code with citations, x402.
Scored across 4 tools
Each tool has a clearly distinct purpose: list_tax_rules catalogs rules, get_tax_rule retrieves a single rule, get_tax_parameters provides tax parameters, and get_rule_pack delivers scenario-based bundles. No functional overlap.
All tool names follow a consistent verb_noun pattern: list_tax_rules, get_tax_rule, get_tax_parameters, get_rule_pack. The naming convention is uniform and predictable.
With 4 tools, the server is well-scoped for its domain (Japanese crypto tax rules). Each tool serves a necessary function, and the count is neither too sparse nor excessive.
The tool surface covers cataloging, single-rule retrieval, parameters, and scenario packs. Minor gap: no batch retrieval for full rules by category, but list with filtering partially addresses this.
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。
| Name | Required | Description | Default |
|---|---|---|---|
| scenario | Yes | Scenario pack to retrieve: defi_staking | overseas_exchange | corporate_holding | transition_2028 |
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。
| Name | Required | Description | Default |
|---|---|---|---|
| tax_year | No | Tax year for epoch annotation of pending-reform rules, e.g. 2026 or 2028 |
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。
| Name | Required | Description | Default |
|---|---|---|---|
| rule_id | Yes | Rule id, e.g. jp.crypto.income.classification.individual |
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。
| Name | Required | Description | Default |
|---|---|---|---|
| category | No | Category filter: corporate | cost_basis | filing | income_classification | reform_2028 | taxable_events | |
| tax_year | No | Tax year to resolve rule applicability, e.g. 2026 or 2028 | |
| taxpayer | No | Taxpayer filter: all | corporate | individual |
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Raw Japanese regulatory data for AI agents: pension, gazette, gBizINFO. x402-metered (USDC).
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