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stem.x402.press stem ask
https://stem.x402.press/stem/ask
answers 402
Ask a multi-domain question combining chemistry, physics, and math computation.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.25
- Network
- base
- Pay to
- 0x3C74Ce3f8566Ff04B312320E7c264A691c409992
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 749 ms
- Payment options
- 6 usable of 6
- Last checked
- 2026-08-15T14:22:07.333Z (6d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fstem.x402.press%2Fstem%2Fask"