io.github.atushi1841/japan-jepx-mcp

Japan JEPX Electricity Spot Price MCP

MCP server exposing Japanese wholesale electricity spot prices from JEPX (Japan Electric Power Exchange) — the system (nationwide) price plus 9 regional area prices at 30-minute granularity (48 periods/day), in JPY/kWh.

Data source: JEPX spot settlement prices (Government Standard Terms of Use), with OCCTO area-price forecast for regional deltas. A bundled seed cache (data/jepx_spot.json, ~400 days × 48 periods = 19,200 records) guarantees offline/fallback answers; a live fetch to JEPX.org is attempted and gracefully falls back to the seed when the site is IP-restricted.

Output sample

{
  "date": "2026-09-17",
  "area": "tokyo",
  "area_label": "東京 (Tokyo)",
  "price": 15.24,
  "unit": "JPY/kWh",
  "period": 48
}

Tools (MCP, 5)

REST endpoints (OpenAPI gateway)

Areas (order of regional prices): system (nationwide), hokkaido, tohoku, tokyo, chubu, hokuriku, kinki (aka kansai), chugoku, shikoku, kyushu. Romaji and kanji (e.g. tokyo / 東京) both accepted.

Use cases

• EV charging scheduling / home-battery arbitrage
• Manufacturing load-shifting to cheap hours
• Electricity market monitoring and forecasting analysis
• Energy cost benchmarking for Japan

Local run

uv run --directory . src/stdio_main.py   # stdio MCP (Claude Desktop / Cursor)
# or REST-only smoke against the seed:
JEPX_DATA_DIR=/tmp/jepx-smoke python3 smoke_rest.py

Deployment

Apify Actor japan-jepx-mcp (Standby mode, webServerMcpPath=/mcp, Dockerfile CMD ["python", "-m", "src.main"]): https://fruitful-quintessence--japan-jepx-mcp.apify.actor/mcp

Apify Store

This MCP server is also available as a managed Apify Actor:

• Apify Store: japan-jepx-mcp — Japanese wholesale electricity spot prices from JEPX (PPE课金). Run from the Apify Store (Run button), then point your MCP client at the endpoint. ## Data & attribution
• Source: JEPX (Japan Electric Power Exchange) spot market settlement prices — jepx.org · OCCTO demand/supply area price forecast — occto.or.jp
• Data licensing: Government Standard Terms of Use (出典明示で商用利用可)
• Unit: JPY/kWh (円/kWh); 48 × 30-min periods per trading day

Install via Smithery

Connect this MCP server to your AI client (Claude Desktop, Cursor, VS Code) in one command:

npx @smithery/cli install atushi1841/japan-jepx-mcp --client claude

Replace claude with cursor, vscode, or cline for other clients.

Alternatively, install directly from the Smithery registry.

Note: Smithery server listing is pending verification. Once verified, this server will appear in search results with useCount tracking.

MCP Registry

This server is registered on the official MCP Registry. Find it via search: japan-jepx-mcp

Data & Store

• Apify Store: https://apify.com/fruitful_quintessence
• Gumroad datasets: https://atushi5.gumroad.com/l/kutuxe