Api Endpoint

Academic Paper Search

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.

Open interactive test console

Offering

Provider: api.kadec0.xyz
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Science And Education
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.kadec0.xyz/v1/papers
MIME type: application/json
First seen: 2026-10-16T01:50:06.715Z
Last seen: 2026-11-02T17:21:45.772Z
Tags: academic-search, paper-search, arxiv-api, pubmed-search, research-paper-api

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA"
  }
]

Observed health

Status: Healthy
Latest latency: 124 ms
Average latency: 189 ms
HTTP status: 402
Last checked: 2026-11-02T17:21:45.767Z
Reachability: 100% over 5 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "q": {
          "type": "string",
          "description": "search query / keywords"
        },
        "source": {
          "type": "string",
          "enum": [
            "all",
            "arxiv",
            "pubmed",
            "openalex",
            "crossref",
            "semanticscholar"
          ],
          "default": "all"
        },
        "maxItems": {
          "type": "string",
          "default": "20",
          "description": "1-50"
        },
        "year_from": {
          "type": "string",
          "description": "earliest publication year (inclusive)"
        },
        "year_to": {
          "type": "string",
          "description": "latest publication year (inclusive)"
        },
        "sort": {
          "type": "string",
          "enum": [
            "relevance",
            "recency",
            "citations"
          ],
          "default": "relevance"
        }
      },
      "required": [
        "q"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "json",
  "example": {
    "count": 1,
    "items": [
      {
        "doi": "10.48550/arxiv.1706.03762",
        "url": "https://doi.org/...",
        "type": "paper",
        "year": 2017,
        "title": "Attention Is All You Need",
        "venue": "NeurIPS",
        "pdfUrl": "https://arxiv.org/pdf/1706.03762",
        "source": "openalex",
        "authors": [
          "Ashish Vaswani"
        ],
        "sources": [
          "openalex",
          "semanticscholar"
        ],
        "abstract": "The dominant sequence transduction models...",
        "citationCount": 181057
      }
    ]
  }
}