OpenClaw API Costs: Why AI Agent Bills Explode, and How to Make That Impossible
An always-on agent is a meter that never stops running. Here's why that meter has bankrupted a few weekends, and the version where it structurally can't.
There's a new genre of confession online: the OpenClaw user opening their API dashboard the way you'd open a letter from the tax office. One documented case burned 1.8 million tokens and $3,600 in a single month. The community wrote guides on cutting a $600 monthly bill to $60, which tells you two things: it's fixable, and $600 months are common enough to need a guide.
Here's the whole answer up front. AI agent bills explode when three things combine: an always-on agent (the meter never stops), postpaid API billing on your own key (no ceiling, you learn the number afterwards), and defaults that quietly maximize token burn (context that grows forever, expensive models for trivial work, nothing cached). myAgents removes all three structurally: you prepay credits, so the worst possible bill is money you already chose to spend; caps exist at every level, down to a spend limit on a single job; and the cost-shrinking machinery (cheap models for routine runs, aggressive caching) is on by default, not a weekend project.
Why OpenClaw bills explode
None of this is malice, it's architecture. OpenClaw runs on your own API key, which means postpaid, metered billing with no built-in ceiling. Then the design stacks the meter: session context accumulates indefinitely, so every message re-sends an ever-growing history. Tool outputs get stored and re-sent. The system prompt rides along on every call. And the agent is deliberately always on, checking in around the clock, which is the entire appeal and also a meter that runs while you sleep.
Two more accelerants. If your instance is one of the exposed ones, a leaked API key means someone else's usage lands on your card. And since Anthropic cut off subscription access for third-party agents, OpenClaw traffic pays full API rates: usage that a $200/month subscription used to soak up can run $1,000+ at the meter.