Marketplace · API · AIPayGen tools

Scholarly article search (Crossref) (AIPayGen)

Search 160M+ journal articles, conference papers, books and preprints across every field via Crossref: title, authors, journal, year, DOI, citation count and abstract. Or look up one DOI. Complements arXiv paper_search.

Endpoint	`https://aipaygen.com/v1/scholar_search`
Price	$0.002 per call
Trust	✓ Verified callable · null% uptime over 0 checks
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
tool	scholar_search
http	GET https://aipaygen.com/v1/scholar_search
mcp	https://aipaygen.com/mcp
docs	https://aipaygen.com/docs#scholar_search
pay	x402 USDC on Base per call (no account), or an API key with prepaid credits. Low-cost tools: 3 free calls a day.

Use it

Call it (an x402 client pays automatically)

curl -i https://aipaygen.com/v1/scholar_search
# 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/aipaygen-scholar-search

Search the whole marketplace from your agent (MCP)

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