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Predict anything.

/forecast and /predict anything with Chronulus in Claude and ChatGPT

Works where you work

Use Chronulus in Claude, ChatGPT, Claude Code, Codex or any MCP-supported client. Install the plugin and start with a slash command.

Cold-start from a prompt

Forecast and predict with no history needed. The assistant researches the latest data first, then hands it to the agent.

Every answer explained

Each forecast comes with a written explanation, and each probability with the reasoning of every expert behind it.

Calibrated and debiased

Confidence intervals on every estimate, order bias cancelled on head-to-head questions, and multi-outcome questions reconciled into one set of probabilities.

Your questions. One Platform.

Use Chronulus Agents in Claude, ChatGPT, or anywhere MCP is supported. Ask in plain language and get back a result you can read, use, and share.

Forecasting Agent

Forecast anything over time

/forecastmonthly foot traffic across the Brooklyn Bridge over the next 12 months
A forecast of monthly pedestrian traffic across the Brooklyn Bridge, with labeled periods of interest
  • Cold-start forecasts from a prompt, with no history needed
  • A plain-English explanation with every forecast
  • Hourly to monthly, up to 10 years out
Prediction Agent

Put a probability on any question

/predictWill the Knicks repeat as Eastern Conference Champs?
A prediction scorecard estimating the probability that the Knicks win the Eastern Conference Finals
  • A calibrated probability with a confidence interval
  • Every expert explains its reasoning
  • Yes-or-no questions, or questions with several outcomes
Pre-paid wallet

Pay for what you use

Add funds to your wallet and every forecast and prediction is charged at its exact cost. No plans, no monthly commitment.

What would your questions cost?

You pay per forecast or prediction, and every result reports the exact amount charged. See how pricing works.