the402 endpoint detail

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agents.dubbleblack.com agent evidence

https://agents.dubbleblack.com/api/agent/evidence

answers 402

Returns ranked products with evidence scores, confidence bands, and provenance metadata for a vertical, an optional category, and a natural language purchase intent. Supports budget, brand, and product ID filters. When observations are too sparse to support a confident recommendation, the API returns HTTP 200 with an empty results array and insufficient_evidence set to true. It never fabricates re

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.10
Network
base
Pay to
0x8c69b13769ca7033145cedbf463a7fe1368537d1
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
557 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:12:04.270Z (2h ago)
Category
data

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagents.dubbleblack.com%2Fapi%2Fagent%2Fevidence"