Execute an allowlisted language operation

Verified session and current membership/usage.read required; bearer keys are not accepted. Inclusive UTC date range, 1–90 days, no future dates, earliest 1970-01-01. Supply both dates or neither (last 30 days including today). Today's bucket is partial. Missing days are zero-filled. This is best-effort recorded usage, not a billing statement. Bootstrap traffic and rejections before the interceptor, including rate limits, are excluded. Persistence failures can leave gaps. Batch HTTP requests count once; item failures within successful responses are not HTTP errors. Submitted characters are Unicode code points, including failed requests that reached the interceptor. No submitted text is retained or returned. Counter strings preserve exact integer precision. Handler durations exclude network, guards and usage persistence. Totals match the returned buckets.