io.github.shigechika/jquants-mcp
J-Quants MCP
Is the J-Quants MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-15.
MCP server for retrieving Japanese stock market data via J-Quants API v2
alive probed 2026-11-15
55tools
28ktokens in Claude Opus 5.5
14.2 %of Claude's 200k window
11×the median server
3.2 sto initialize
13 msto list tools
- Run it
- uvx jquants-mcp@1.6.0 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Reports itself as
- jquants-mcp 1.6.0
- Capabilities
- prompts, resources, tools
- Instructions
- none
- Of a 1M window
- 2.8 % of a 1M context window
- Count
- 28k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 29k. The o200k_base estimate is 17k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/shigechika/jquants-mcp
- Registry
- active, updated 2026-11-14 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.66×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| get_value_stock_screen | 1 397 | 840 | 5 % |
| get_candlestick_data | 943 | 567 | 3 % |
| get_dividend_yield_ranking | 890 | 535 | 3 % |
| get_valuation_ranking | 838 | 504 | 3 % |
| get_equities_earnings_calendar | 810 | 487 | 3 % |
Compare this server with others.
More servers
Other registry entries on pypi.org, the ones next to this name; all of them.
- Cloud Armor WAF Patrol MCP io.github.shigechika/cloudarmor-mcp · alive
- entraadm MCP io.github.shigechika/entraadm-mcp · alive
- EOS MCP io.github.shigechika/eos-mcp · alive
- Google Workspace Admin Security-Audit MCP io.github.shigechika/gwsadm-mcp · alive
- Junos MCP io.github.shigechika/junos-mcp · alive
- KeyCloak MCP io.github.shigechika/keycloak-mcp · alive
- MCP Stdio io.github.shigechika/mcp-stdio · needs env
- netdiag MCP io.github.shigechika/netdiag-mcp · alive
Servers that mention quants.
- com.civilquants/civilquants · alive
- QuantSonar io.github.QuantSonar/quantsonar · alive
- com.quantstark/quantstark · needs auth
- PtData io.ptdata/ptdata · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- This server is in the heaviest 10 % of the registry. Shorter descriptions, fewer optional parameters and fewer tools cut the cost. The command npx mcpcost --url <endpoint> --tools 50 lists every tool with its cost.