Quickstart
An overview of how to start using J-Quants API and what the experience looks like once you begin.
Overall Flow
- Register as a user on the J-Quants Website (free).
- Choose a subscription plan. You can start with the free plan.
- After signing in, the Quick Start Guide on your dashboard walks you through the way that suits you, step by step.
To use the API, you need to register for one of the subscription plans, including the Free plan. For differences between user registration and subscription plans, please refer to the FAQ.
Three Ways to Get Started
| Option | Best for |
|---|---|
| Work with your AI (recommended) | You already use AI tools such as Claude or ChatGPT |
| Write code in Colab | You want to learn the API by writing Python |
| Download files from your browser (Light plan or higher) | You want CSV files from the screen to use in Excel or similar tools |
The Quick Start Guide on your dashboard walks you through each of these after signing in. Here is what each experience looks like.
Work with your AI (recommended)
After a few setup commands, just ask an AI tool such as Claude or ChatGPT in plain language.
Example request to the AI (Light plan or higher)
Using the J-Quants CLI, download the last 5 years of stock price data into
~/jquants-data, and set it up so the latest data is saved automatically every evening.
Data accumulates locally every day, and you can ask questions of your own data in plain language — "Which stocks saw a volume spike yesterday?" or "How do prices tend to move the day after earnings?"
Write code in Colab
A Python notebook that requires no setup, letting you learn while calling the API directly.
Download files from your browser (Light plan or higher)
No installation needed. Download CSV files from the dashboard's Downloads screen and use them directly in Excel or similar tools.
What Each Plan Offers
The available data types and periods depend on your plan.
For Developers Calling the API Directly
You can call the API over HTTP from your own programs. Issue your API key from the [API Keys] screen in the dashboard (not needed if you use the CLI's jquants login, which issues one automatically).
Request
curl -G https://api.jquants.com/v2/equities/bars/daily \
-H "x-api-key: {loading}" \
-d code="86970" \
-d date="20240104"