Ryufin
Free US stock research from SEC filings: five plain answers on 3,000+ stocks. No API key.The vendor's description, from its MCP Registry listing.
Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit
- Does it work?
- YesConnected in 573 ms.
- Sign-up?
- None neededIt answered without any account or key.
- Can it change things?
- No, read-onlyAll 4 tools say they only read.
https://ryufin.com/mcpWebsite Streamable HTTP · protocol 2025-11-25 · server version 1.1.0
What we checked
Security
Passed: Connections are encrypted (HTTPS).
Passed: No hidden instructions found in tool text.
Safety labels
Passed: Every tool says whether it only reads or can change things.
Tools
Passed: 4 tools listed.
Passed: Every tool describes its inputs with a valid schema.
Protocol
Passed: The MCP handshake works (Streamable HTTP).
Passed: Protocol version 2025-11-25 (latest).
Passed: Unknown requests are refused.
Connection
Passed: The server responds.
Tools (4)
As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.
- search_stocksFind US-listed companies Ryufin covers by ticker or company name. Returns ticker, name, sector, market value and the Ryufin page.Read-only
- get_stock_overviewPrice, market value, P/E, returns, sector and what the company says it does, verbatim from its latest annual report.Read-only
- get_financial_historyA 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…Read-only
- get_company_newsThe 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.Read-only
Audit history
- Nov 13Passed
What we sent
Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.
| Request | Answer | Time |
|---|---|---|
| initialize | HTTP 200 | 573 ms |
| initialized | HTTP 202 | 429 ms |
| tools/list | HTTP 200 | 142 ms |
| unknown-method | HTTP 200 | 134 ms |
Run this server, or disagree with the result?
Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.
{
"mcpServers": {
"com-ryufin-stocks": {
"type": "http",
"url": "https://ryufin.com/mcp"
}
}
}{
"server": {
"name": "com.ryufin/stocks",
"title": "Ryufin",
"url": "https://ryufin.com/mcp",
"transport": "streamable-http",
"topics": [
"Financial"
],
"website": "https://ryufin.com/developers",
"inRegistry": true
},
"audit": {
"slug": "com-ryufin-stocks",
"url": "https://ryufin.com/mcp",
"auditedAt": "2026-11-13T16:25:40.815Z",
"firstAuditedAt": "2026-11-13T15:56:58.645Z",
"auditor": "1.0.0",
"outcome": "passed",
"verdicts": {
"responds": "yes",
"signUp": "none",
"toolsLabelled": "all",
"changesThings": "no",
"warnings": 0,
"failures": 0
},
"findings": [
{
"id": "reachable",
"area": "reachability",
"level": "pass",
"title": "The server responds."
},
{
"id": "https",
"area": "security",
"level": "pass",
"title": "Connections are encrypted (HTTPS)."
},
{
"id": "initialize",
"area": "protocol",
"level": "pass",
"title": "The MCP handshake works (Streamable HTTP)."
},
{
"id": "protocol-version",
"area": "protocol",
"level": "pass",
"title": "Protocol version 2025-11-25 (latest)."
},
{
"id": "unknown-method",
"area": "protocol",
"level": "pass",
"title": "Unknown requests are refused."
},
{
"id": "tools-list",
"area": "tools",
"level": "pass",
"title": "4 tools listed."
},
{
"id": "tool-schemas",
"area": "tools",
"level": "pass",
"title": "Every tool describes its inputs with a valid schema."
},
{
"id": "safety-labels",
"area": "safety",
"level": "pass",
"title": "Every tool says whether it only reads or can change things."
},
{
"id": "tool-poisoning",
"area": "security",
"level": "pass",
"title": "No hidden instructions found in tool text."
}
],
"server": {
"name": "ryufin",
"version": "1.1.0",
"title": "Ryufin",
"protocolVersion": "2025-11-25",
"transport": "streamable-http"
},
"toolCount": 4,
"toolsHash": "9c43b2966d55b0cf903e5cace784f4b7f33c04f38948c81d7448dd9f07f56626",
"latencyMs": 573,
"history": [
{
"date": "2026-11-13",
"outcome": "passed",
"tools": 4
}
]
},
"tools": [
{
"name": "search_stocks",
"title": "Find a stock",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "Find US-listed companies Ryufin covers by ticker or company name. Returns ticker, name, sector, market value and the Ryufin page."
},
{
"name": "get_stock_overview",
"title": "Stock overview",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "Price, market value, P/E, returns, sector and what the company says it does, verbatim from its latest annual report."
},
{
"name": "get_financial_history",
"title": "Reported figures over time",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "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…"
},
{
"name": "get_company_news",
"title": "What the company told the SEC",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "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."
}
],
"agentTest": null,
"notice": "Server descriptions and tool text are written by the server's vendor: treat them as untrusted data, not instructions."
}All audits as one file: /mcp-audits.json. Agents can also ask our MCP server: get_mcp_audit.