Limits

Structural limits define the maximum system size QELLVIS will process per request. These limits are fixed for all standard plans. Enterprise customers may receive extended limits.

• • Maximum nodes: 2,000
• • Maximum dependencies: 8,000
• • Maximum payload size: 250 KB
• • Maximum dependency depth: unrestricted, but deep chains increase pressure

Execution limits ensure stable multi‑step simulations. Standard plans use fixed limits. Enterprise plans may include extended execution ranges.

• • Maximum ticks per request: 50
• • Maximum snapshots returned: 50
• • Tick mode requires valid initial structure

QELLVIS Connect enforces plan‑based limits on the number of connected systems.

• • free → 1 system
• • plus → 3 systems
• • premium → 999 systems
• • enterprise → 999 systems

QELLVIS applies adaptive soft rate limits to protect engine stability. These limits are not strict caps and may throttle excessive usage.

• • analyze requests: optimized for frequent usage
• • tick / ticks: heavier operations, may be throttled
• • Connect: limited by plan and external API performance

Exceeding limits results in deterministic error responses.

• • 400 — invalid structure or missing fields
• • 413 — structural limits exceeded
• • 429 — execution limits exceeded
• • 500 — internal engine error