Task

Scientific Constant Lookup

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Constant lookup x402 REST usage

Look up a physical constant by its key (e.g. "speed-of-light"), symbol (e.g. "c") or exact name. Returns the CODATA 2018 recommended value, unit, relative standard uncertainty (0 for values that are exact by SI definitio...

physics.openverbs.com Data & Finance 1 calls / 30d checked 2026-10-26

0.004 USDC per call per call

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