Breakage report
Credits that expired unused, by class: included (an allowance or a rollover, no cash paid), promotional, and paid (cash paid, so its value at cost_basis is breakage revenue). Operating figures: confirm the accounting treatment, and any limits on expiring prepaid value, with your adviser. Credits and money are reported separately and never added together.
Authentication
A secret key (rl_sk_test_..., rl_sk_live_...) or a restricted key with limited scopes (rl_rk_test_..., rl_rk_live_...). A restricted key can carry agent: true and an expires_at, and is what a coding agent should hold. Keys end in a checksum so secret scanners can recognize them. People create, roll and revoke keys in the dashboard; GET /v1/api_keys lists them, masked.
Query parameters
The credit type (ID or key). Without it, every credit type is reported.
How to split the range. Default month.