Requires a provider service-account API credential, the provider-only agentUsageData flag (default off), and a delegated user (x-bobsled-delegated-user) who may access Usage and, unless Bobsled staff, has usageCloudCostsSection enabled. These are environment-wide Vantage cloud costs, identical for authorized providers in this deployment, not allocated provider costs. Only the current and previous UTC months are available; other months are rejected. Defaults to the current month; measurements end yesterday UTC. USD amounts use the same customer-visible grouping, parent rollups, multipliers, contract markups (Snowflake is billed at cost plus the environment Snowflake markup) and minimum amount as the Cloud Costs tab of the Usage page. Sledhouse compute and storage are billed as Platform Usage and are excluded, so totals will not match raw Vantage spend. Hidden and internal/unclassified groups and staff SKU detail are never exposed. Monthly amount is the sum of displayed groups, not raw or gross spend; null means no measured days and a measured month with no visible charges is zero. measuredDays and expectedDays describe elapsed eligible dates, not the full future month; isComplete requires every eligible day to be measured. Ingest completeness does not guarantee finalized cloud bills. The exact successful refresh timestamp is unknown (analyticsUpdatedAt is null). Group pagination does not truncate monthly totals; use the summary endpoint for months without groups. A 403 denies access; a 503 means data is unavailable, not zero.