Limits

Limit	Value
Raw presigned PUT	100,000,000 bytes with Content-Length (413 too_large over)
Multipart / base64 request	8 MiB including envelope; use raw PUT for larger files
Log batch	1000 entries / 1 MB (import mode: 100 / 5 MB)
Log entry message	16 KB
Log entry metadata	32 KB serialized
Log resource	128 chars
Dataset name	[a-z0-9_-]{1,64}
List page size	default 50, max 100 (files and logs)
Presigned URL lifetime	your expiresAt, at most 5 min, single completion with safe retries

Plan caps (storage, delivery, datasets, dashboards, log retention) are in the plan table. Hitting a cap is an error, never a silent drop: uploads get 403 quota_exceeded, log ingest 429 quota_exceeded, dataset create 403 dataset_limit. Your current usage is always visible in the dashboard and via the usage endpoint (see the API reference).