{
  "x402Version": 2,
  "id": 311,
  "slug": "311",
  "resource": "https://api.kadec0.xyz/v1/papers",
  "description": "Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "maxItems": "10",
            "q": "transformer attention",
            "sort": "citations",
            "source": "all"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "count": 1,
            "items": [
              {
                "abstract": "The dominant sequence transduction models...",
                "authors": [
                  "Ashish Vaswani"
                ],
                "citationCount": 181057,
                "doi": "10.48550/arxiv.1706.03762",
                "pdfUrl": "https://arxiv.org/pdf/1706.03762",
                "source": "openalex",
                "sources": [
                  "openalex",
                  "semanticscholar"
                ],
                "title": "Attention Is All You Need",
                "type": "paper",
                "url": "https://doi.org/...",
                "venue": "NeurIPS",
                "year": 2017
              }
            ]
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "maxItems": {
                    "default": "20",
                    "description": "1-50",
                    "type": "string"
                  },
                  "q": {
                    "description": "search query / keywords",
                    "type": "string"
                  },
                  "sort": {
                    "default": "relevance",
                    "enum": [
                      "relevance",
                      "recency",
                      "citations"
                    ],
                    "type": "string"
                  },
                  "source": {
                    "default": "all",
                    "enum": [
                      "all",
                      "arxiv",
                      "pubmed",
                      "openalex",
                      "crossref",
                      "semanticscholar"
                    ],
                    "type": "string"
                  },
                  "year_from": {
                    "description": "earliest publication year (inclusive)",
                    "type": "string"
                  },
                  "year_to": {
                    "description": "latest publication year (inclusive)",
                    "type": "string"
                  }
                },
                "required": [
                  "q"
                ],
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.kadec0.xyz",
  "lastUpdated": "2026-09-18T18:33:28.545Z",
  "quality": {
    "calls30d": 181,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-09-18T18:33:28.275Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.kadec0.xyz",
    "manifest_name": "api.kadec0.xyz",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}