Marketplace · API · x402

x402-filings.datalayer.workers.dev/v1/research/papers

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.

Endpoint	`https://x402-filings.datalayer.workers.dev/v1/research/papers`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x917e635b83F0dd7e8172c55EC4EEbb28B734cA85
method	GET
last updated	2026-10-27T03:03:32.454Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-filings.datalayer.workers.dev/v1/research/papers
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-590301d420fd3c1d

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}