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Network Calc TCP Throughput Calculator
x402
Network Calc TCP Throughput Calculator is a paid API for AI agents from network-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Calculates TCP bandwidth-delay product, required window size and scale factor, and throughput limits from both window size and packet loss (Mathis equation)
Price / call$0.02
Success—
StatusUnknown
How this service works
TCP bandwidth-delay product, window size and scale factor needed, throughput limits from window and from packet loss (Mathis).
Output
Returns a structured JSON object containing: the bandwidth-delay product in bytes, KiB, and MiB; recommended window size and scale shift/multiplier to fill the link; window-limited throughput in Mbps and MBps; Mathis equation loss-limited throughput in Mbps; the factor currently limiting throughput (window or loss); number of TCP segments in flight; a human-readable summary and verdict; and any caveats or degraded-mode flags.
Example use cases
Satellite link TCP tuning
“I have a satellite internet link with 600ms RTT and 50 Mbps bandwidth and default 65535-byte TCP window — calculate the bandwidth-delay product and tell me what window size and scale factor I need to saturate the link.”
Data center WAN bottleneck diagnosis
“My 10 Gbps cross-country link has 40ms RTT and I'm seeing only 200 Mbps TCP throughput — can you calculate whether I'm window-limited or loss-limited, assuming 1460-byte MSS and 0.01% packet loss?”
VPN tunnel performance estimation
“I'm planning a VPN tunnel over a 100 Mbps link with 25ms round-trip time — calculate the TCP bandwidth-delay product and expected max throughput so I can set buffer sizes correctly.”
Technical details
Endpoint
GEThttps://network-calc.x402tookit.com/tcp-throughput?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need precise TCP performance calculations — BDP, window scaling requirements, or Mathis throughput bounds — for network engineering, tuning TCP buffer sizes, diagnosing WAN underperformance, or capacity planning. Prefer this over generic bandwidth calculators when you specifically need TCP-layer analysis including window scale factors and loss-based Mathis limits rather than simple link-layer bandwidth math.
Side effects
- Missing required rttMs parameter returns a validation error
- Extremely low or zero RTT values may produce degenerate BDP results
- Very high loss percentages (>10%) may yield near-zero Mathis limits with no useful throughput estimate
- Invalid or non-numeric parameter values return schema validation errors
- Parameters outside physically meaningful ranges may produce warnings in the reasons array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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