Ryufin MCP server

Which servers in the official MCP registry are Ryufin's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-20

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Whose server it is

Registry namecom.ryufin/stocksverified in the MCP registry

The registry name sits under ryufin.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-20

Stateanswerschecked 2026-10-20
Tools6
Server calls itselfryufin
Server version1.0.0
Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 176 ms.

Measured dailydaily checks: 1, the first on 2026-10-20

Answeredmeasuring1 of the 7 daily checks it takes to print a share
Median first answer654 ms
Space in an agent's context≈ 744 tokensthe definitions of all its tools (6), which an agent carries on every turn
Tool definitionsB · 89 of 100

Parameters without a description: in 4 of 6

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The state of vendors' MCP servers: method and numbers →

Tools it offers6 tools · read 2026-10-20

search_stocks
Find US-listed companies Ryufin covers by ticker or company name. Returns ticker, name, sector, market value and the Ryufin page.
get_stock_answers
Ryufin's five answers for one stock: is the business good, is it safe, is the price fair, is it growing, what is the market doing with it. Each answer has a one-word verdict, a plain sentence, the checks it was read from (with values and…
get_stock_overview
Price, market value, P/E, returns, sector, RyuScore (0 to 100 from seven weighted criteria) and what the company says it does, verbatim from its latest annual report.
get_financial_history
A reported financial series for one stock from its SEC filings, trailing twelve months or single quarters, newest last. Metrics: pe, revenue, net_income, eps, gross_margin, op_margin, net_margin, roe, roa, roic, fcf.
get_company_news
The company's own recent current reports (8-K), newest first: the date, what kind of event, the company's own sentence and a link to the filing on sec.gov.
get_answer_changes
Stocks whose answer to one of the five questions changed in the latest nightly run (for example Safety from Good to Watch), largest companies first.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "stocks": {
      "type": "http",
      "url": "https://ryufin.com/mcp"
    }
  }
}

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.