the402 endpoint detail

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api.agentstools.dev scholar citations

https://api.agentstools.dev/scholar/citations

answers 402

Citation graph of a paper: the works it references (outgoing) and the works that cite it (incoming), each as normalized records, plus the Semantic Scholar influential-citation count. Give a doi, arxiv, pmid, openalex_id or title. Ideal for literature review and prior-art mapping.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
177 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:14:23.944Z (2h ago)
Category
data

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.agentstools.dev%2Fscholar%2Fcitations"