IntervalSync
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IntervalSync gives your assistant a secure, structured view of your Intervals.icu training. Claude, ChatGPT, Grok, or any other assistant that supports remote MCP can reach your activity history, repeat execution, raw streams, wellness, and planned workouts — and answer from the record rather than from what a training summary implies.
The usual answer is an assistant built into the training product itself. IntervalSync takes the other route: it leaves the choice of assistant to you, and carries your training to it.
An AI built into a training app works inside that app, on that app’s data. The assistant you already use knows you are coming back from illness, that the race is in April, and that Tuesdays are short. Your training arrives as one more thing it knows about you, not as a separate conversation you have to set up again.
The assistant you prefer in a year may not be the one you prefer today. Your training history should not have to move each time you change your mind. One connection covers Claude, ChatGPT, Grok, and whatever you use next.
IntervalSync has a workspace, but you go there to connect an assistant, manage billing, or revoke access — not to read your training. Intervals.icu keeps the data, your assistant answers the questions, and there is no new place to check every day.
Start with a prompt, then ask follow-up questions. The assistant can pull only what the question needs and explain how it reached the answer.
Copy focused prompts for weekly load, threshold progress, HR drift, interval execution, recovery, and year-over-year comparisons.
Explore prompts → 02 / DATAMove from activity headlines to repeat-level results, targets, training summaries, planned workouts, wellness, and raw one-second streams.
Explore the data surface → 03 / ANSWERSComparing one labelled interval across weeks, VAM on a climb, a trainer ride that arrived as a single block — the questions the data supports but no chart shows, and where each answer stops being trustworthy.
See what it answers → 04 / SETUPAdd the shared IntervalSync MCP address in Claude, ChatGPT, Grok, or whatever you use next. OAuth gives it a revocable token — not your Intervals.icu credentials.
Open the setup guide → 05 / ANALYSTWhat your assistant can read, the questions that have answers you can trust, how to ask them, and where the answers stop. It is not a coach.
Read the guide →IntervalSync is designed to let an assistant investigate a question instead of guessing from a recent-workout list.
Sign in to Intervals.icu through IntervalSync. No API key needs to be pasted into an assistant.
Paste the shared MCP address in the AI assistant that supports a custom connection.
Give dates, sport, goals, and the comparison you want. Use the prompt library as a starting point.
New accounts get 14 days of full access. Afterwards Free is read-only; every write still requires your confirmation, and platform access can be revoked in Settings.
Every new account begins with the same reads and writes as Pro for 14 days, up to 300 calls to Intervals.icu a day. Afterwards, choose the Free daily-read plan or keep full access with Pro. A coach whose athletes share their training takes a Coach plan; people who train together and each have a plan can form a team. Every plan has a daily limit, and the terms set out each one. Pricing puts the plans side by side, with what each includes and who pays.
Reads plus confirmation-gated planned-workout and wellness writes, up to 300 Intervals.icu calls a day. After 14 days, Free becomes read-only with one Intervals.icu data pull per tool per UTC day.
$0 to startKeep reads and confirmation-gated planned-workout and wellness writes, up to 300 Intervals.icu calls a day. An active monthly partner code makes the first two billing periods free, then renews at $5/month.
Promo codes are entered at checkoutGet the same Pro capability for $49/year. An active annual partner code takes 50% off the first billing period; sponsor access is issued privately.
Choose a plan in your workspace$15 a month or $149 a year. Everything in Pro for your own account, and your assistant reads the training of up to five athletes who approve it, read-only. Up to 800 Intervals.icu calls a day, for your own reads and theirs together. Athletes need no plan of their own.
How coach sharing works$29 a month or $289 a year. The same as Coach 5 for up to fifteen athletes, with up to 1,800 Intervals.icu calls a day. Each athlete approves read-only access themselves and can withdraw it at any time.
What each side keeps when it endsA team costs nothing extra: each member is on Pro, a Coach plan or a trial that is still running. Members share one context, and each chooses which of five groups of their training the others' assistants can read. An account is in one team.
A Coach plan or a Pro Team?