Legal Leap MCP（旧 政省令わかるくん）

com.seishorei-wakarukunPublished by seishorei-wakarukun.comOfficial publisherv0.6.1Updated Oct 24, 2026

日本法リサーチMCP。e-Gov全法令の検索・条文取得、委任先解決、裁判例検索、国会会議録、改正沿革、官公庁一次資料（PDF/HTML）の本文読取・読み起こし全文までこれ1本で

VerifiedStreamable HTTPWeb executableKnowledge & Memory

Overview

AI-generated overview

A remote Japanese-law research MCP server that lets an assistant search all e-Gov statutes, fetch provisions, resolve delegation chains, and look up case law,国会

What you can do
Search and retrieve provisions across all e-Gov Japanese statutes, including full-text reading of official PDF and HTML primary sources and transcription of their text. Resolve delegation targets between laws and follow amendment history. Search court decisions and National Diet session records.
When to use it
Useful when answering questions about Japanese legislation, statutory text, amendment history, court cases, or Diet proceedings, and when official primary-source text is needed rather than secondary summaries.
Requirements
A remote streamable HTTP endpoint; no local runtime, package, environment variable, or header is declared. The manifest declares no authentication.
Before you install
The manifest declares no authentication, so consider what queries you send to a third-party service. Content is limited to Japanese legal and governmental sources; verify important legal conclusions against the original official documents.

Installation

In SourceWeft

  1. Open Legal Leap MCP（旧 政省令わかるくん） in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.seishorei-wakarukun%2Flegal-research/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "legal-leap": {
      "type": "http",
      "url": "https://seishorei-wakarukun.com/api/mcp"
    }
  }
}

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v0.6.1LatestSep 16, 2026

Score

67% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.