Biorhythm Calculator MCP for AI. Schedule your life around your body's natural peaks.
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Biorhythm Calculator quantifies your three core biological cycles: physical strength, emotional state, and intellect. It analyzes these rhythms against specific dates to show you exactly when you'll be at peak capacity or facing a dip in energy.
What your AI can do
Check critical windows
Find future dates where cycles cross zero, signaling expected biological instability or dips.
Locate rhythm peaks
Determine the next specific date when any of your physical, emotional, or intellectual cycles hit their maximum point.
Get rhythm status
Get a precise energy percentage reading for all three cycles on a single, chosen date.
Determine the current percentage levels for physical, emotional, and intellectual cycles on a specific date.
Identify future dates where your biological cycles cross zero, signaling expected periods of low energy or transition.
Find the next date when any of your three biological cycles will reach their highest positive amplitude.
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Biorhythm Calculator: 3 Tools
These three tools let you analyze current biological status, predict future instability windows, and pinpoint maximum energy peaks across all your core cycles.
Make your AI actually useful.
Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.
Start using Biorhythm Calculator on VinkiusCheck Critical Windows
Find future dates where cycles cross zero, signaling expected biological instability or dips.
Locate Rhythm Peaks
Determine the next specific date when any of your physical, emotional, or...
Get Rhythm Status
Get a precise energy percentage reading for all three cycles on a single, chosen...
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Claude AI
Open Claude Settings
Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
Add Custom Connector
Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL:
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Choose How to Get Started
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Build Your Own
Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.
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Make Your AI Do More
Start with Biorhythm Calculator, then connect any of our 5,100+ other servers whenever your AI needs more. One click, no limits.
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Works with Claude, ChatGPT, Cursor, and more
The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.
This connection provides 3 powerful capabilities that interface natively with Claude, ChatGPT, Cursor, and other compatible AI platforms. No middleware. No custom integration required.
We all manually try to plan our days around how we 'feel.'
Right now, planning your week means looking at a calendar and hoping for the best. You might check your mood journal or scroll through old data just to remember what felt good last month. It's all guesswork; you’re trying to predict complex biological cycles using anecdotal evidence.
With this MCP, the process is automated. Instead of relying on memory, you ask the system for a prediction across three dimensions—physical, emotional, and intellectual. You get concrete dates showing exactly when your energy peaks or where instability hits.
Predicting Cycles with Biorhythm Calculator
You don't have to manually calculate complex trigonometric functions for three separate cycles. You simply run a query, and the MCP handles the math, giving you actionable dates.
What changes is that scheduling moves from reactive hoping to proactive design. You now build your week around predictable peaks, knowing exactly when you’ll be most effective.
What your AI can actually do with this
This MCP lets you get hard numbers on how your body is working. Instead of just guessing if you feel drained today, you can check the actual standing and energy percentages for physical, emotional, and intellectual cycles for any date. You can pinpoint days where instability hits or find when you'll hit a maximum peak in one area.
It gives you predictive data to plan workouts, meetings, or deep work sessions around your natural biological flow. Connecting this via Vinkius means all your preferred AI clients—Claude, Cursor, Windsurf, and VS Code—can access these insights instantly, letting you structure your life based on science, not guesswork.
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Here's how it actually works
The bottom line is... it tells you when your body naturally wants to be performing at its best or when it's going through a dip.
You specify a target date or a range of dates you want to analyze.
The MCP runs its algorithms, calculating the energy percentages and identifying key cycle movements for that period.
You get back detailed reports showing current status, predicted low points, and optimal peak dates.
Who is this actually for?
Anyone who feels like they are constantly 'off'—the wellness coach whose clients skip workouts, the biohacker trying to optimize every minute, or the freelancer who struggles with focus dips. If you spend time guessing why you feel tired on Tuesdays, this is for you.
You use it to advise clients on ideal training days, matching heavy lifts only to their predicted physical peaks.
You run reports to suggest optimal times for team-building events or high-stakes meetings based on group emotional cycles.
You use it to schedule deep work sessions, reserving intense focus tasks only for the days when your intellectual cycle is at maximum amplitude.
What Changes When You Connect
Stop guessing when you'll be effective. Use get_rhythm_status to know exactly what energy percentages you can expect on any day, making planning immediate.
Never accidentally schedule a major project for a low point. Checking critical windows with check_critical_windows flags potential dips weeks in advance.
Maximize your focus. Running locate_rhythm_peaks tells you the exact date when your intellect is highest, so you can schedule your hardest work then.
Tailor recovery plans based on data. By knowing when cycles are low, you adjust your physical activity to prevent burnout.
Better meeting scheduling. You use this MCP to advise teams not just on what they need to do, but when they should do it.
See it in action
Planning a major product launch
The marketing manager needs to coordinate global press events. Instead of picking arbitrary dates, they use the MCP to check critical windows for the whole team and select a week where all emotional cycles are stable and high.
Optimizing study time for an exam
A student uses locate_rhythm_peaks on their intellectual cycle. They then map out their review schedule, dedicating the most complex material to the peak date predicted by the tool.
Managing seasonal fatigue
A user wants to understand why they feel sluggish during certain months. They run get_rhythm_status across a year's worth of dates, quickly spotting predictable dips that align with known biological patterns.
Structuring athletic training
A coach needs to peak an athlete for a competition. They use the tool to locate rhythm peaks and build a taper schedule, ensuring maximum physical amplitude hits on race day.
The honest tradeoffs
Using general mood trackers
Just logging 'I feel tired today' in a journal or using a simple calendar reminder. This only documents what already happened.
You need predictive data. Use get_rhythm_status to see your current energy percentages, and then use check_critical_windows to predict when the fatigue is coming.
Relying on gut instinct
Thinking that 'I feel good right now, so I should schedule a big presentation.' This ignores underlying cyclical dips.
Don't assume it. Always check locate_rhythm_peaks first to confirm your intellectual cycle is actually at its maximum positive amplitude before committing to high-stakes work.
Ignoring the three cycles
Only tracking physical fitness data without considering mental load. You might overtrain when emotionally drained.
This MCP tracks all three—physical, emotional, and intellectual. Check get_rhythm_status to ensure you balance your energy across all three dimensions.
When It Fits, When It Doesn't
Use this if your problem involves predicting human performance or natural cycles over time. Specifically, if you need to know when a person's emotional state is likely to dip, or when their intellectual capacity will peak, the Biorhythm Calculator gives you that foresight. Don't use it if you just need simple mood tracking; those general journaling apps are fine for recording history. Also, don't use this if your goal is simply to count steps—a standard fitness tracker handles that. You must use this when timing and prediction are critical factors in success.
Questions you might have
How do I use the `get_rhythm_status` tool? +
You input a specific date, and the MCP returns the current energy percentages for physical, emotional, and intellectual cycles on that day. It's your snapshot of biological standing.
What does `check_critical_windows` actually find? +
This tool identifies specific upcoming dates where a cycle is expected to cross zero. This signals a potential period of instability or significant drop in energy.
I need to know my next best day, so what do I use? (locate_rhythm_peaks) +
Run locate_rhythm_peaks. It pinpoints the exact date when any of your three cycles will reach their maximum positive amplitude, telling you when you're strongest.
Is this only for fitness tracking? +
No. While great for fitness, it applies to anything that requires peak mental performance, like studying or complex decision-making. It covers all three cycles.
What specific inputs does `get_rhythm_status` require? +
It requires a single, specific date as input. The tool uses that day's calendar date to calculate and return the current energy percentages and amplitudes for your physical, emotional, and intellectual cycles.
If I use `check_critical_windows`, what is the effective prediction range? +
The system calculates instability based on standard biorhythm models. You can predict critical windows far in advance, though the accuracy relies on continuous cycle assumptions starting from today's date.
Can I use `locate_rhythm_peaks` within a larger automation workflow? +
Yes. Since this is an MCP, your AI client can call the tool function directly alongside other API calls. You simply pass the necessary date range parameters to find maximum biological strength.
Are there any limitations or rate limits when calling `get_rhythm_status` repeatedly? +
Vinkius manages the backend capacity of this MCP. While high usage is generally supported, repeated, extremely rapid-fire queries may temporarily encounter throttling to maintain service stability.
What are the three biorhythm cycles? +
The three primary cycles are Physical (23 days), Emotional (28 days), and Intellectual (33 days).
What is a critical day? +
A critical day occurs when any of the three biological cycles cross the zero-point, indicating a period of transition and potential instability.
How can I find my next peak performance day? +
You can use the locate_rhythm_peaks tool to identify upcoming dates when each cycle reaches its maximum positive amplitude.
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