ToolVet

Chemistry Calculators

11 x402 APIs served from chemistry-calc.x402tookit.com

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

At a glance

Listings
11 x402 APIs
Passing at the latest check
7 of 11
Uptime, 30 days
58.8% on average across 11 listings
Price
$0.02 per call
Trust score
34 to 63, median 58
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 11 listings

Ranked by trust score.

  • 63trust
    Half LifeChemistry Calculators

    Radioactive decay: remaining fraction after a time, time to reach a fraction (carbon dating), decay constant and mean life.

    x402 APIOther
    $0.02per call on Polygon
    70.6% uptime, 519 msPassing, checked 10 h ago
  • 62trust
    DilutionChemistry Calculators

    Dilution equation C1 x V1 = C2 x V2: give any three values and get the fourth, plus solvent to add and the dilution factor.

    x402 APIOther
    $0.02per call on Polygon
    66.7% uptime, 530 msPassing, checked 9 h ago
  • 61trust
    Ideal GasChemistry Calculators

    Ideal gas law PV = nRT: give any three of pressure, volume, moles and temperature and solve the fourth, in common units.

    x402 APIOther
    $0.02per call on Polygon
    64.3% uptime, 526 msPassing, checked 4 h ago
  • 60trust
    Limiting ReagentChemistry Calculators

    Limiting reagent, theoretical yield and leftover excess for a balanced reaction from reactant masses; optional percent yield.

    x402 APIMarkets & finance
    $0.02per call on Polygon
    61.1% uptime, 519 msPassing, checked 10 h ago
  • 59trust
    MolarityChemistry Calculators

    Molarity of a solution from solute grams and volume, or the grams of solute needed to make a target molarity and volume.

    x402 APIOther
    $0.02per call on Polygon
    56.3% uptime, 510 msPassing, checked 28 min ago
  • 58trust
    Mole ConvertChemistry Calculators

    Convert between grams, moles and molecule counts for a chemical formula using Avogadro's number.

    x402 APIDocuments & files
    $0.02per call on Polygon
    53.3% uptime, 529 msPassing, checked 9 h ago
  • 58trust
    Empirical FormulaChemistry Calculators

    Empirical formula from percent or gram composition by element, and the molecular formula if you give the molar mass.

    x402 APIOther
    $0.02per call on Polygon
    53.3% uptime, 512 msPassing, checked 12 h ago
  • 57trust
    Element LookupChemistry Calculators

    Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points.

    x402 APIOther
    $0.02per call on Polygon
    50.0% uptime, 532 msFailing, checked 2 h ago
  • 34trust
    Ph CalcChemistry Calculators

    pH and pOH for a strong or weak acid or base, a hydrogen-ion concentration, or a buffer (Henderson-Hasselbalch).

    x402 APIOther
    $0.02per call on Polygon
    57.9% uptime, 528 msFailing, checked 28 h ago
  • 34trust
    Molar MassChemistry Calculators

    Molar mass and percent composition by element for a formula, including brackets and hydrates such as CuSO4.5H2O.

    x402 APIOther
    $0.02per call on Polygon
    55.6% uptime, 527 msFailing, checked 24 h ago
  • 34trust
    Bond PolarityChemistry Calculators

    Bond type between two elements from the Pauling electronegativity difference: nonpolar covalent, polar covalent or ionic.

    x402 APIMarkets & finance
    $0.02per call on Polygon
    57.9% uptime, 527 msFailing, checked 26 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.