Time series data for billing charts, optionally grouped by product, channel, or provider
Admin API key (format: sk_admin_*) for organization-level operations
Start date (YYYY-MM-DD)
^\d{4}-\d{2}-\d{2}$"2026-02-01"
End date (YYYY-MM-DD)
^\d{4}-\d{2}-\d{2}$"2026-02-28"
product, channel, provider Daily cost time series