Constant list
physics.openverbs.com
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 definition) and category.
- Category
- Service
- Networks
- Base
- Starting price
- $0.004
- Paid calls, 30 days
- 5
Paid endpoints
3 endpoints, sorted by usage. Prices are per request.
| Endpoint | Price | Network | Facilitator | Calls / 30d |
|---|---|---|---|---|
POST/v1/list 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. | $0.004 | Base | Coinbase CDP | 3 |
POST/v1/constant 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 definition) and category. | $0.004 | Base | Coinbase CDP | 1 |
POST/v1/search 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. | $0.004 | Base | Coinbase CDP | 1 |
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