Official MCP RegistryListed
PlainQuant
Free, read-only US and HK stock research: event studies, stock scores, rule results and SEC filings.
First seen 8 Nov 2026. Evidence as of 14 Nov 2026.
8
Tools
From an anonymous probe
1
Source listings
Each with its own history
11
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| check_stocks | Trend and business scores (1-100) for up to 20 US or Hong Kong stocks, the industry ranks behind them, whether each is stretched above its average, and whether the scores have predicted later returns. Accepts tickers (NVDA), HK codes (700) or company names, comma-separated. | Read-only |
| company_filings | A US stock's important SEC filings in the last days (default 30, at most 90): results, 10-Q and 10-K, officer or director changes, major agreements and deals, 5%+ stakes (13D), with links to the filings on SEC EDGAR. Takes a ticker or company name. Hong Kong is not covered. | Read-only |
| event_study | For each past occurrence of the event, the move of the market (market: US = the S&P 500 via SPY, the default for US events; HK = the Hang Seng Index, from its first close after the news; 'measured' in the answer names it) 2 weeks, 4 weeks and 3 months later (fractions: 0.037 = +3.7%), plus median, share up, worst and best beside any window of the same length. With too few occurrences only the list is given. Give symbol (a ticker or company name of the measured market) to measure that one stock's own price, dividends included, instead of the market (QQQ for the Nasdaq-100). Use for questions like 'what happens to stocks after a midterm election / an FOMC meeting', 'what did AAPL do after CPI' or 'what did Hong Kong do after the Fed'. | Read-only |
| index_move_study | Like event_study, for a move of an index found in our prices: index SPY (S&P 500), QQQ (Nasdaq-100) or HSI (Hang Seng Index) moving pct percent (signed: -10 = a fall of 10% or more) within days trading days (a fall without days = from its high). Use for 'what happens if the Nasdaq drops 10% in two days' or 'what does Hong Kong do after the S&P 500 falls 3% in a day' (market HK). | Read-only |
| list_events | The events PlainQuant has history for (Fed decisions, CPI, jobs reports, US elections, quarterly options expiry, market drops), with ids, names in English and Chinese, and aliases. | Read-only |
| market_snapshot | US and Hong Kong large stocks as of each market's last close (the date is as_of): how many have a strong, good, mixed or weak price trend, how many are stretched above their average, and the strongest and weakest groups by median trend. A description of that day, not a forecast. Use for 'how broad is the rally' or 'which sectors are strongest'. | Read-only |
| rule_estimates | For each of PlainQuant's library stock-picking rules (US and Hong Kong) at default settings: the plain backtest's return a year after trading costs beside the honest estimate left after delisted stocks and untuned test periods (fractions: 0.05 = 5% a year), the trade count and the test window. Use for 'does momentum / value / moving-average investing work' or 'how much do backtests overstate'. | Read-only |
| upcoming_events | Fed decisions, CPI and jobs reports scheduled in the next days (default 30, at most 180), copied from each official calendar, each with the link to what the market did after past ones. Use for 'what market events are coming this week'. | Read-only |
Change history
- rule_estimates: description changed (+"after trading costs" -"costs,")
- market_snapshot: title changed
- market_snapshot: description changed (+"as of each market's last close (the date is as_of):" +"that day," -"today:")
- server instructions changed (+"at the last close," +"the scores as of the last close;" -"today,")
- upcoming_events: tool added
- rule_estimates: tool added
- market_snapshot: tool added
- company_filings: tool added
- server instructions changed (+"upcoming_events lists scheduled events ahead; rule_estimates compares each library rule's raw backtest with its honest estimate; market_snapshot sums up today's scores; company_filings lists a US stock's important SEC filings.")
- Description changed (registry)
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | com.plainquant/plainquant | 8 Nov 2026 | 14 Nov 2026 | 2 |