What the $0.50 welcome credit covers
Real credit, added once, used like any other.
Every new workspace gets $0.50 of API credit in its ledger. It pays for agent runs (model tokens) and decided actions ($0.02 each) exactly like purchased credit. Short agent replies on Claude Haiku 5.5 cost a fraction of a cent, so it covers a lot of testing.
Your balance is in the sidebar and under Billing, and every charge is listed in Billing → Transactions.