Radikabunavi MCP (ラジ株ナビ) is a hosted remote MCP server for Japanese listed-company data, built from EDINET annual securities reports and TDnet timely disclosures. It covers roughly 3,700 Prime, Standard and Growth companies with up to 10 years of history.
The GitHub repository holds documentation only; the server itself is a hosted service at https://radikabunavi.com/mcp. Besides raw financials, it returns Radikabunavi's own models: a 6-axis score, an "ideal price", DCF valuations and industry benchmarks. The service is for information only and is not investment advice.
How to use Radikabunavi MCP (ラジ株ナビ)?
The endpoint uses Streamable HTTP and accepts either of two sign-in methods:
OAuth 2.1 with PKCE and dynamic client registration. Clients such as Claude and ChatGPT use it automatically, so no API key is needed; you sign in through the browser when prompted.
Bearer API key (Authorization: Bearer rk_...), issued free from the Radikabunavi My Page (https://radikabunavi.com/mcp-mypage).
The official setup guides are in Japanese: a 3-step start guide, plus Claude, ChatGPT and Claude Code guides linked from the README.
Claude Code
With OAuth (sign-in happens in the browser):
claude mcp add --transport http radikabunavi https://radikabunavi.com/mcp
The README notes that config key names differ between clients, so check your client's documentation.
Key features of Radikabunavi MCP (ラジ株ナビ)
Data straight from public filings: EDINET (Financial Services Agency) and TDnet (Tokyo Stock Exchange). J-Quants and Yahoo Finance are not used.
About 3,700 listed companies across Prime, Standard and Growth, with up to 10 years of history.
Company search that absorbs hiragana, katakana and full- or half-width variants.
Proprietary analytics: a 0–100 6-axis score, an ideal-price model (Mark 3.2) and DCF breakdowns.
Shareholder data, including large-holding (5% rule) reports, top-10 shareholder history and investor-to-holdings reverse lookup.
Screening by financial conditions or by growth, high-dividend, value and earnings-recovery frames.
A personal watchlist with notes, stored on the service.
Radikabunavi MCP (ラジ株ナビ) tools
The live server card lists 22 tools.
Search and overview:search_stocks finds a company by name or securities code; get_stock_analysis returns financials, ideal price, score, benchmark, forecast and DCF in one call; list_edinet_stocks describes coverage and sources.
Financials and earnings:get_edinet_financial_data, get_earnings_forecast, get_earnings_flash (ordered by attention level) and get_timely_disclosures for a given date.
Ownership and customers:get_large_holdings, get_major_shareholders_history, get_investor_portfolio and get_main_customers (customers above 10% of consolidated sales, plus the reverse lookup).
Valuation and screening:get_stock_score, get_ideal_price, get_dcf_valuation, get_industry_benchmark (TSE 33-industry medians and quartiles), screen_stocks and screen_by_framework.
Watchlist and feedback:add_to_watchlist, get_watchlist, remove_from_watchlist, update_watchlist_note, and report_issue for data errors, used only with the user's consent.
Use cases of Radikabunavi MCP (ラジ株ナビ)
Quick research: "Give me a full analysis of Toyota (7203): financials, score and DCF."
Earnings season: "Which TDnet earnings flashes today got the most attention?"
Ownership tracking: "Who filed 5% large-holding reports for this company, and how have its top shareholders changed?"
Screening: "Find high-dividend Prime companies with stable profits."
Benchmarking: "Where does this company sit within its TSE 33-industry group on margins?"
Troubleshooting Radikabunavi MCP (ラジ株ナビ)
401 Unauthorized: the endpoint requires sign-in. Use a client that supports OAuth, or send Authorization: Bearer rk_... with a key from My Page.
Quarterly data missing: the Free plan covers annual data only. Q1–Q3 earnings data needs Light or above.
Daily limit reached: each plan has a cap on API calls per day (100 on Free). Wait for the reset or upgrade.
Watchlist full: Free allows 10 stocks and Light 50.
Frequently asked questions
1
Is Radikabunavi MCP free?
There is a Free plan at 0 JPY with 100 API calls a day and annual data only. Paid plans per the README: Light 500 JPY a month (250 calls a day), Standard 1,980 JPY (1,000) and Pro 3,980 JPY (2,000). Check the service page for current details.
2
Do I need an API key?
Not with Claude or ChatGPT, which sign in through OAuth. Clients that take a URL plus headers can use a free Bearer key that starts with `rk_`.
3
Can I self-host Radikabunavi MCP?
No. The repository contains documentation and a `server.json` registry entry only, with no source code. The server is a hosted service.
4
Where does the data come from?
From EDINET annual securities reports and TDnet timely disclosures and earnings reports. Data comes from public filings and may contain errors or delays.
5
Is it investment advice?
No. Radikabunavi provides information only and does not recommend buying or selling any security.
6
Is it listed in the official MCP Registry?
Yes, as `com.radikabunavi/japan-stock-edinet`. It is also listed on Smithery and Glama.
7
What is the Radikabunavi MCP (ラジ株ナビ) remote MCP server?
The Radikabunavi MCP (ラジ株ナビ) remote MCP server is a hosted Model Context Protocol endpoint at https://radikabunavi.com/mcp, so AI assistants can connect to it without installing or running anything locally.
8
How do I connect to the Radikabunavi MCP (ラジ株ナビ) MCP server?
Add the endpoint https://radikabunavi.com/mcp to any MCP-compatible client such as Claude Code, Cursor, or VS Code. The setup snippets on this page configure each client in one step.
9
Does the Radikabunavi MCP (ラジ株ナビ) MCP server require authentication?
Yes. Radikabunavi MCP (ラジ株ナビ) uses OAuth: the first time you connect, your MCP client opens a browser window to sign in and authorize access, then reuses the credentials for future sessions.
10
Which transport does the Radikabunavi MCP (ラジ株ナビ) MCP server use?
Radikabunavi MCP (ラジ株ナビ) exposes a Streamable HTTP endpoint, the transport used by remote MCP servers and supported by all major MCP clients.
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