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Sindri Physical Constants Lookup
x402
Sindri Physical Constants Lookup is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the exact CODATA-published value of a named fundamental physical constant (e.g. speed of light, Planck constant, Boltzmann constant).
Price / call$0.01
Success—
StatusUnknown
How this service works
Lookup of standard physical constants (speed of light, gravitational constant, Planck constant, elementary charge, Avogadro number, Boltzmann constant, gas constant, electron mass) with exact published CODATA values.
Output
Returns the exact CODATA-published numeric value (and likely units) for the requested physical constant — one of: speedOfLight, gravitationalConstant, planckConstant, elementaryCharge, avogadroNumber, boltzmannConstant, gasConstant, or electronMass.
Example use cases
Physics homework unit verification
“What is the exact value of the speed of light? I need the precise CODATA figure for my physics problem set.”
Chemistry calculation with Avogadro's number
“Can you look up the exact Avogadro number for me? I need the precise value to finish my stoichiometry calculation.”
Quantum mechanics formula with Planck constant
“What's the exact published CODATA value of the Planck constant? I'm computing photon energies and need maximum precision.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/physicalConstantsWhen to prefer
Use this endpoint when you need a precise, authoritative CODATA value for one of the eight supported fundamental physical constants and want a deterministic, reproducible lookup rather than relying on a language model's potentially imprecise recall. Ideal for scientific computing, formula verification, or educational tools.
Side effects
- Invalid or unsupported constant name — only the eight enumerated constants are accepted
- Missing 'constant' field in request body returns validation error
- Network timeout or service unavailability returns HTTP error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| constant | string | Which constant to look up. |
Tags
x402
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