| Area | Limit |
|---|---|
| Widget RPC | 8 s per handler call; one dashboard RPC at a time per worker; reads cached ~5 s |
| JS bridge | 600 calls/min; kv / metrics / sql / dashboard namespaces only |
| Iframe host | resize clamped to 200–5000 px; same-origin assets only (CSP) |
| Cold start | widgets retry 5× at 1.5 s intervals while your worker boots |
Every enforced number across the whole SDK lives in Reference: Limits and quotas.