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url-uptime-checker.underscoredone.com check
https://url-uptime-checker.underscoredone.com/check
answers 402
Checks whether a website or web address is currently reachable and reports how fast it responded.
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
- 0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 92 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-15T14:24:07.396Z (21h ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Furl-uptime-checker.underscoredone.com%2Fcheck"