Connect J-Quants to ChatGPT
Query J-Quants directly from ChatGPT. Arlet links the two through one MCP connection and takes care of API keys.
This server connects your AI client to J-Quants API V2, the official market data API operated by JPX Market Innovation & Research (Japan Exchange Group). It provides pro-grade Japanese equities data collected directly from the exchange.
Key features:
- Look up listed companies (name, sector, market segment) by issue code or by company-name keyword.
- Fetch daily OHLC bars (open/high/low/close, volume, turnover, and split-adjusted figures) for any listed stock, over a date range.
- Fetch quarterly financial summaries built from TDnet earnings reports (kessan tanshin).
- Check upcoming earnings announcement dates and the trading calendar (market holidays).
Using the API requires a J-Quants account and an API key issued from the J-Quants dashboard. A free plan is available (data is delayed; paid plans unlock fresher data, longer history, and higher rate limits - the free plan allows 5 requests per minute). Set the key as JQUANTS_API_KEY in your Arlet environment variables.
How to connect J-Quants to ChatGPT
- 1
In the Arlet dashboard, open Data tools, find J-Quants, set the API key issued by J-Quants and switch it on.
- 2
In ChatGPT, open Settings → Plugins → Browse plugins and click + at the top right.
- 3
In the New Plugin form, enter "Arlet" as the Name, choose Server URL for Connection and enter https://mcp.arlet.dev/mcp/, pick OAuth for Authentication, check the risk acknowledgement and click Create.
- 4
Open the Arlet plugin you created, click Sign in with Arlet, sign in with Google and click Allow. The connection is complete.
If the Plugins screen is not shown, turn on Developer mode under Settings → Security and login.