A remote MCP server for comparing Japanese household utility plans — electricity, city gas, fiber internet and mobile — with annual cost estimates and bundle or
What you can do
Search electricity, city gas, fiber and mobile plans by area, household size, usage or data volume, ranked by estimated cost. Simulate annual electricity and fiber costs, including cashback expectations and monthly breakdowns. Compare two to five selected plans side by side, covering cancellation fees, fuel adjustments, points and set discounts. Estimate switching costs for fiber and combined electricity-plus-gas bundles. Generate application links for electricity, gas, fiber, mobile and home router plans.
When to use it
Useful when someone in Japan wants to review household utility spending: finding cheaper electricity, gas, fiber or mobile plans, checking whether switching pays off, or comparing a combined electricity-and-gas bundle.
Requirements
A remote streamable HTTP endpoint; no package, account, API key or environment variable is declared.
Before you install
All figures are rough estimates; fuel and raw-material adjustments, usage patterns and discount conditions can change actual charges, so final terms must be checked on each provider's official site. The service may receive affiliate commissions from providers, and application links are affiliate links; the user completes any application themselves. Cashback expected values are the site's own estimates, not measured receipt rates.
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/io.github.yhagiwara-meliorra%2Fwattoku/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.
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
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.