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Forecast backtest (MAPE + RMSE)

Backtest a forecasting method on the input series by holding out the last `testSize` observations, forecasting them, and computing MAPE (mean absolute percentage error) + RMSE (root mean squared error). Lets an agent pick which method (mean

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
194 ms
Price
$0.001 per call
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3 (directory's own records)
Paid calls, last 30 days
3
Category
Forecasts, signals and predictions
Address
https://agent402.tools/api/forecast-eval

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