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x402-filings.datalayer.workers.dev research papers
https://x402-filings.datalayer.workers.dev/v1/research/papers
answers 402
Academic literature from Crossref, the DOI registry itself. Search by topic, author or exact DOI and get normalised records with citation counts, journal, publisher, authors with affiliations, and an open-access flag, plus a cohort view: median citations, most-cited work and the year range. Filter by minimum citations, publication year or open access only.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x917e635b83F0dd7e8172c55EC4EEbb28B734cA85
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 10 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:14:40.883Z (31d ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402-filings.datalayer.workers.dev%2Fv1%2Fresearch%2Fpapers"