the402 endpoint detail

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x402stock.xyz screener smart

https://x402stock.xyz/api/v1/screener/smart

answers 402

Describe a screen in plain English via `?q=` (e.g. 'oversold large caps up today on high volume'). An LLM parses it into a filter, screens the entire US market, optionally confirms oversold/overbought with RSI, and returns a ranked shortlist with a one-line rationale per name. No need to know the filter schema or run the enrichment loop yourself. From x402stock

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.20
Network
base
Pay to
0x3070Fbb3803819fB5BdfE9286fdc6325A877fA85
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
187 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:34:35.834Z (6d ago)
Category
ai-inference

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402stock.xyz%2Fapi%2Fv1%2Fscreener%2Fsmart"