Start a batch that runs the agent's attached tests against its current draft, one run per test and repeat. A simulation test repeats simulation.repeat_count times, and a repeat_count in the body repeats every selected test that many times instead. A batch starts at most 1000 runs. Runs are queued and finish in the background, simulations take minutes. Poll GET /v1/agent/agents/{agent_id}/test-batches/{batch_id} until completed is true, then gate on pass_rate, which leaves out error runs.

Each simulation run that ends passed or failed is billed: a platform fee per agent reply plus the LLM tokens of the agent, the simulated user and the judge. error runs are not billed. A batch with a simulation test returns 402 when the account has no trial balance or API credit left, and 403 when the team's agreement does not allow agent usage.