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Physics Constants Search
x402
Physics Constants Search 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).
Search physical constants by key, symbol, or name substring with ranked results (exact > prefix > substring matches)
Price / call$0.004
Success—
StatusUnknown
How this service works
Search the constants table by key, symbol or name substring. Exact matches rank first, then prefix matches, then substring matches. Returns up to `limit` constants (default 20) plus the total match count.
Output
A ranked list of matching physical constants (up to the specified limit, default 20), each including key, symbol, name, value, unit, and category, plus a total match count indicating how many constants matched the query overall.
Example use cases
Finding a constant by symbol
“I remember the symbol for the gravitational constant is capital G — can you search the physics constants table for 'G' and show me what comes up?”
Exploring constants by topic
“Search for all physical constants related to 'electron' and list up to 15 of them so I can see which ones are available.”
Resolving an ambiguous constant name
“I can't remember the exact name of the constant for the speed of light — can you search for 'light' in the physics constants database and show me the top matches?”
Technical details
Endpoint
POSThttps://physics.openverbs.com/v1/searchWhen to prefer
Use this endpoint when you don't know the exact key or symbol for a constant and need fuzzy/partial matching with ranked results. Prefer the lookup endpoint when you have an exact key or symbol. Prefer the list endpoint when you want to browse all constants in a category without a specific query.
Side effects
- Query string empty or exceeds 60 characters — validation error returned
- Limit outside range 1–42 — validation error returned
- No constants match the query — empty results list with total count of 0
- Network timeout or service unavailability — HTTP 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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