A few details on Piast-Q

• A broker API with an API key in a header.

• You send the native gate list directly, and two conventions catch everyone: angles are in units of pi, and there must be exactly one measurement, at the end.

• Plan depth against coherence, not against your time budget.

• Two limits: 200 shots per job, and a limit on concurrent connections. PCSS’s troubleshooting text names the answer HTTP error 429 response: max connections reached but gives no number, so keep one connection open at a time.

• For the site’s page on the machine, open: PCSS: PIAST-Q