# io.github.kodandy/jp-crypto-tax-rules (remote · jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app)

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

- Trust score: 64/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app`: 64/100 (this document), [markdown](https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an.md), [page](https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an)

## Channel facts

- Endpoint: `https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 60/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 616 tokens (~154/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http kodandy-jp-crypto-tax-rules https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp
```

### Codex

```toml
[mcp_servers.kodandy-jp-crypto-tax-rules]
url = "https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "kodandy-jp-crypto-tax-rules": {
      "type": "remote",
      "url": "https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add kodandy-jp-crypto-tax-rules --url https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  kodandy-jp-crypto-tax-rules:
    url: "https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp"
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 62, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 62, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 60, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 59)

First indexed and scored.

## MCP tools (4)

### `list_tax_rules` (~196 tokens)

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。

Input parameters:

- `category` (string): Category filter: corporate | cost_basis | filing | income_classification | reform_2028 | taxable_events
- `tax_year` (integer): Tax year to resolve rule applicability, e.g. 2026 or 2028
- `taxpayer` (string): Taxpayer filter: all | corporate | individual

### `get_tax_rule` (~97 tokens)

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。

Input parameters:

- `rule_id` (string, required): Rule id, e.g. jp.crypto.income.classification.individual

### `get_tax_parameters` (~126 tokens)

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。

Input parameters:

- `tax_year` (integer): Tax year for epoch annotation of pending-reform rules, e.g. 2026 or 2028

### `get_rule_pack` (~197 tokens)

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。

Input parameters:

- `scenario` (string, required): Scenario pack to retrieve: defi_staking | overseas_exchange | corporate_holding | transition_2028

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an#diagnostics

## Score history

- 2026-08-03: 64
- 2026-08-02: 63
- 2026-08-01: 63
- 2026-07-31: 62
- 2026-07-30: 62
- 2026-07-29: 61
- 2026-07-28: 61
- 2026-07-27: 60
- 2026-07-26: 59

## Links

- Remote endpoint: https://jp-crypto-tax-rules-62ko7b2uwa-an.a.run.app/mcp
- Repository: https://github.com/kodandy/jp-crypto-tax-rules-mcp
- Changelog RSS feed: https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an/changelog.json
- HTML version of this page: https://verifymcp.io/servers/kodandy-jp-crypto-tax-rules/jp-crypto-tax-rules-62ko7b2uwa-an