← All endpoints
x402.outpimp.com chemicalElementLookup
https://x402.outpimp.com/chemicalElementLookup
answers 402
Periodic table element lookup by symbol or atomic number, returning name, atomic mass, and category. Covers the most commonly referenced elements.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 61 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:12:36.856Z (31d ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.outpimp.com%2FchemicalElementLookup"