Japan RuleWatch

Minimal, read-only Remote MCP for official Japanese rule evidence.

Version 0.0.1 covers one topic: Japanese mail-order sales advertising. It exposes two tools over stateless Streamable HTTP:

• search_rules

• get_evidence_pack

The dataset is a small allowlist of official Consumer Affairs Agency and e-Gov sources. There is no account, authentication, database, crawler, payment, legal-compliance verdict, or write operation.

Public endpoint

https://japan-rulewatch-mcp.kadopi.workers.dev/mcp

Related MCP server: mfds-mcp

Example: find official sources for a Japanese ecommerce workflow

Use Japan RuleWatch to find curated official sources when researching mail-order advertising and return-policy disclosures for a Japanese online store.

Connect your MCP client to the public endpoint above.

1. Call search_rules with {"query":"return policy","limit":2}.

2. Choose a returned ID and call get_evidence_pack, for example {"id":"caa-mail-order-advertising-qa"}.

The response includes an official source URL, a short summary, and scope limitations. Open the official source to verify its current content before using it. This is a small curated index, not a live legal-update feed, a website scanner, or a compliance verdict. retrievedAt is the response time, not the date the official source was last verified.

Local development

npm install
npm run check
npm test
npm run dev

Endpoints:

• GET /

• GET /health

• MCP Streamable HTTP: /mcp

Safety boundary

• Official HTTPS sources only

• Fixed local dataset; no arbitrary URL fetching

• Read-only tools

• Inputs limited by schema

• No personal data or request-body persistence

• Outputs are informational evidence, not legal advice

Deployment is manual and requires explicit approval.