Your AI agent doesn't know when you peak. Now it can.
WhenPeak is the performance intelligence layer for AI agents and the humans they serve. One API call tells your agent when to schedule deep work, protect the dip, and prepare for the moments that matter.
Predictions update daily. Connect Apple Health for your personal curve.
Your biology is compounding.
Are you timing it right?
Set your salary, expected promotion timeline, and industry. See how cognitive protocol execution diverges from the average trajectory over five years.
Tech / Startup model. Protocol: 7% annual raises + 22% promo bump, promotion 20% earlier. Average: 4% annual raises + 15% promo bump. Sources: McKinsey high-performance research; organisational psychology meta-analyses on merit allocation and promotion velocity. For illustrative purposes only. Not financial advice. Projections are hypothetical. Actual outcomes depend on employer, role, performance, and economic conditions. Individual results vary significantly.
One platform. Two ways to experience it.
Whether you're building AI agents or optimising your own performance, WhenPeak provides the same prediction engine, via API or directly.
Give your agent a cognitive layer
AI agents schedule meetings, prioritise tasks, and draft responses, but they don't know if their human is cognitively ready for what's being scheduled. A single WhenPeak API call gives your agent that context: peak window, dip time, daily readiness score, and chronotype.
- Agent calls /api/v1/predict at the start of the user's day
- Receives peak window, dip time, DPS, and upgrade prompts
- Schedules work, meetings, and focus blocks accordingly
POST /api/v1/predict → peak_1: "10:00", dip: "14:00", peak_2: "17:00", dps: 74
Know your cognitive state before your day begins
Connect Apple Health or answer three questions about last night's sleep. WhenPeak returns your 24-hour performance curve: when to do your most important work, when to rest, and how last night's sleep changed today's trajectory.
- Daily performance curve from your actual sleep data
- Peak, dip, and secondary window for every day
- Works in ChatGPT, Claude, or the mobile app
Build agents that understand their humans
Your agent knows the user's calendar, email, and tasks. It doesn't know if they slept well or when their brain peaks. WhenPeak is the missing context layer, one API call, clean JSON, works with any framework or LLM.
curl -X POST https://api.whenpeak.com/api/v1/predict \
-H "Content-Type: application/json" \
-d '{
"sleep_time": "23:30",
"wake_time": "07:00",
"sleep_quality": "good",
"exercise_yesterday": true,
"exercise_timing": "morning"
}'Per-user performance curves
Daily peak, dip, secondary window, DPS, and chronotype. Stateless (no auth) or personalised (authenticated, improves over 30 days).
Developer dashboard
See your end-users' aggregated performance metrics, API usage, and data confidence levels, so you know how well the model is calibrated for your user base.
Multi-user architecture
Provision isolated end-user accounts under your developer key. Each user gets their own sleep history, chronotype, and personalised curve. Growth and Scale tiers.
Works where you already work
WhenPeak runs inside the tools your users are already in.
ChatGPT
Available now as a GPT. Users ask in plain English, WhenPeak predicts their peak. No app required.
Claude
MCP skill deployed. Claude can call WhenPeak directly to answer performance questions for its users.
Any AI agent
OpenAPI spec published. Any LLM with function calling can integrate WhenPeak in under an hour.
Mobile app
Direct access to your performance curve, sleep history, and 7-day outlook. Connect Apple Health or WHOOP.
Built on peer-reviewed science
The Two-Process Model (Borbély 1982) governs every prediction. Process C tracks your circadian clock. Process S tracks homeostatic sleep pressure. Their interaction produces your 24-hour performance curve, calibrated to your chronotype.
WhenPeak's model is built on peer-reviewed chronobiology and a review of performance research from leading institutions.
- -Sleep quality, duration, consistency, and debt
- -HRV relative to your 30-day personal baseline
- -Exercise timing and chronotype classification
Built for when it matters most
Performance timing changes outcomes. The science is clear.
AI Agents & Developers
Give your AI agent cognitive awareness. One API call returns when its human peaks, dips, and is ready for what matters.
Live on ChatGPT and ClaudeInterview Preparation
Book interviews in your sharpest window. Know if last night's sleep will cost you the offer.
15–25% higher starting packagesDeep Work & Projects
Protect the 90-minute window where you produce 2.4× more than the rest of the day.
30% faster task completionSales & Negotiation
Enter negotiations when emotional regulation and recall peak: the two factors that determine deal quality.
4× higher performance bonusesPhysical Performance
Train when your body is ready. WhenPeak flags low-recovery days before your CNS pays the price.
Up to 50% fewer overuse injuriesExam Preparation
Match study sessions to your exam time. Sleep before exam day. Build a schedule that consolidates what you learn.
40% better memory after good sleepSimple pricing
Start free. Scale when you're ready.
For developers and early exploration
- ✓1,000 API calls / month
- ✓Stateless predictions
- ✓OpenAPI spec
- ✓Community support
For products with real users
- ✓50,000 API calls / month
- ✓Authenticated user predictions
- ✓30-day personal baselines
- ✓7-day performance forecasts
- ✓Webhook support
- ✓Email support
For high-volume integrations
- ✓500,000 API calls / month
- ✓Everything in Growth
- ✓White-label available
- ✓Dedicated support
- ✓SLA
Enterprise or white-label? hello@whenpeak.com
Common questions
Answers to what people ask before they integrate.
Your peak is predictable.
Start with one API call. No account required.