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Physics Constants List API
x402
Physics Constants List API is a paid API for AI agents from physics.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Lists all physical constants in the dataset, optionally filtered by category (universal, adopted, electromagnetic, atomic, physico-chemical), returning constants, total count, and available categories.
Price / call$0.004
Success—
StatusUnknown
How this service works
List every physical constant in the dataset, or only those in a given category (universal, adopted, electromagnetic, atomic, physico-chemical). Returns the constants, the total count and the set of available categories.
Output
Returns a list of physical constants (each with key, symbol, name, value, and unit), the total count of constants returned, and the set of available categories (universal, adopted, electromagnetic, atomic, physico-chemical).
Example use cases
Browse all available physics constants
“Show me every physical constant available in the dataset — I want to see the full list.”
Filter constants by category
“Can you pull up all the atomic physical constants from the physics constants database?”
Discover available constant categories
“What categories of physical constants are available, and what constants fall under physico-chemical?”
Technical details
Endpoint
POSThttps://physics.openverbs.com/v1/listWhen to prefer
Use this endpoint when you need to enumerate or browse the full set of physical constants, or want to filter by a known category. Prefer this over the search endpoint when you don't have a specific constant in mind but want to explore what's available. Use the lookup or search endpoints instead when you know the exact key, symbol, or name of the constant you need.
Side effects
- Invalid category string returns an error or empty result
- Category value exceeding 30 characters is rejected by schema validation
- Network timeout on slow connections
- Payment failure via x402 protocol blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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