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toolcall.click chem compatibility
https://toolcall.click/t/chem/compatibility
answers 402
Can chemical A be safely mixed or stored with chemical B? Pass two CAS numbers or names. Returns a verdict (incompatible / caution / no_known_hazard), the reason, expected effects (gas evolution, heat, fire, toxic fumes) and confidence, from expert reasoning over PubChem GHS data and CAMEO-derived reactivity profiles. JSON response. $0.03 USDC per call, pay via x402, no API key.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.03
- Network
- base
- Pay to
- 0x84FA7Ea8303d4f503267e2e998A3F7D980e814a5
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 259 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:10:58.985Z (33d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Ftoolcall.click%2Ft%2Fchem%2Fcompatibility"