the402 endpoint detail

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vaaya.ai openalex works

https://vaaya.ai/api/run/openalex/works

answers 402

Search 250M+ scholarly works (OpenAlex — successor to Microsoft Academic Graph). Pass `search` and/or `filter` (comma-joined, e.g. from_publication_date:2024-01-01,is_oa:true,cited_by_count:>100), optional `sort`, `page`, `per_page`. Returns metadata + abstracts + citation counts + OA links. The citation-graph layer kadec0/papers lacks.

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
0x7c655d3d3944Bd27994dD81A036C3aFB19806C40
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
453 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:26:15.044Z (1d ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fvaaya.ai%2Fapi%2Frun%2Fopenalex%2Fworks"