ToolVet

Systems Capacity Calculators

10 x402 APIs served from data-calc.x402tookit.com

Every listing from Systems Capacity Calculators that ToolVet tracks. Each one is called on a schedule without paying and scored out of 100.

At a glance

Listings
10 x402 APIs
Passing at the latest check
8 of 10
Uptime, 30 days
61.2% on average across 10 listings
Price
$0.02 per call
Trust score
33 to 63, median 61
Paying wallets, 30 days
No usage data
Verified owner
None
Security findings
None found
Listed since
20 Oct 2026

No usage data. The x402 Bazaar reports paying wallets for the x402 APIs it lists; MCP servers and APIs submitted directly have none.

All 10 listings

Ranked by trust score.

  • 63trust
    Storage GrowthSystems Capacity Calculators

    Compound storage growth: size after N months, raw capacity with replication and overhead, months to double, months until full.

    x402 APIDocuments & files
    $0.02per call on Polygon
    70.0% uptime, 540 msPassing, checked 6 h ago
  • 61trust
    Raid CapacitySystems Capacity Calculators

    RAID 0/1/5/6/10 and ZFS RAID-Z usable capacity, efficiency, fault tolerance, write penalty and rebuild read-error risk.

    x402 APIDocuments & files
    $0.02per call on Polygon
    64.3% uptime, 531 msPassing, checked 7 h ago
  • 61trust
    Latency BudgetSystems Capacity Calculators

    Add up serial stage latencies against a target (share per stage, slack, bottleneck) and compute tail amplification from fan-out.

    x402 APIEmail & messaging
    $0.02per call on Polygon
    64.3% uptime, 518 msPassing, checked 3 h ago
  • 61trust
    Erlang StaffingSystems Capacity Calculators

    Erlang B and C: trunks for a blocking target, or agents for a service level such as 80 percent answered in 20 seconds.

    x402 APIOther
    $0.02per call on Polygon
    64.7% uptime, 519 msPassing, checked 10 h ago
  • 61trust
    Capacity PlanningSystems Capacity Calculators

    Units needed for a peak load at a target utilisation plus N+k redundancy, utilisation after failures, and growth projection.

    x402 APIOther
    $0.02per call on Polygon
    64.3% uptime, 529 msPassing, checked 3 h ago
  • 61trust
    Big OSystems Capacity Calculators

    Compare growth classes (n, n log n, n^2, 2^n, n!) at a given n: operation counts, run time, largest n a time budget allows.

    x402 APIDeveloper tools
    $0.02per call on Polygon
    64.3% uptime, 530 msPassing, checked 5 h ago
  • 59trust
    Sla DowntimeSystems Capacity Calculators

    SLA availability (99.9 percent, three nines) to allowed downtime per day, month and year; series and parallel composition.

    x402 APIOther
    $0.02per call on Polygon
    56.3% uptime, 520 msPassing, checked 42 min ago
  • 59trust
    Littles LawSystems Capacity Calculators

    Little's law L = rate x time in system: solve for concurrency, throughput or latency given any two; sizes pools.

    x402 APIOther
    $0.02per call on Polygon
    56.3% uptime, 536 msPassing, checked 2 h ago
  • 33trust
    Throughput BudgetSystems Capacity Calculators

    Requests per second times payload size to Mbps with peak factor, protocol overhead and link headroom; or IOPS to MB/s.

    x402 APIOther
    $0.02per call on Polygon
    53.9% uptime, 513 msFailing, checked 23 h ago
  • 33trust
    Queue ModelSystems Capacity Calculators

    M/M/1 and M/M/c queue: utilisation, probability of waiting (Erlang C), queue length, wait and response time, tail odds.

    x402 APIAI models & inference
    $0.02per call on Polygon
    53.9% uptime, 512 msFailing, checked 22 h ago

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How these numbers are made

Each listing is called on a schedule without paying. Listings with usage or a verified owner are checked about every 30 minutes, others about every 6 hours. Uptime is the share of passing checks over 30 days, averaged across this provider's listings. Trust scores follow the published method. The figures on this page can be a few minutes behind the latest checks, and listings hidden after review aren't counted.