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ai-data-marketplace-1042299154756.us-central1.run.app v1 x402_endpoint_preflight
https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/x402_endpoint_preflight
answers 402
Probe a public endpoint without paying, validate its x402 payment challenge and Base requirements, and check exact listing evidence in Coinbase Bazaar and 402index before a buyer authorizes payment.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.005
- Network
- base
- Pay to
- 0x8647F7D7a1368a467Ad1FF757fBc2e7167973558
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 65 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-15T14:26:27.934Z (1h ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fai-data-marketplace-1042299154756.us-central1.run.app%2Fapi%2Fv1%2Fx402_endpoint_preflight"