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mirrored listing x402 eip155:8453

Citation lookup and reference list for a paper

Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar.

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30000 (raw units)
price
10
calls / 30d
2
unique payers
2026-09-17
updated

Provider

api.kadec0.xyz · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "doi": "10.48550/arXiv.1706.03762"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "count": 1,
          "items": [
            {
              "citationCount": 181057,
              "citedBy": [
                {
                  "citedByCount": 90000,
                  "title": "BERT: Pre-training...",
                  "year": 2019
                }
              ],
              "doi": "10.48550/arxiv.1706.03762",
              "fieldsOfStudy": [
                "Computer Science"
              ],
              "referenceCount": 41,
              "references": [
                {
                  "doi": "...",
                  "title": "Neural Machine Translation...",
                  "year": 2014
                }
              ],
              "title": "Attention Is All You Need",
              "type": "paper_details",
              "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": {
              "anyOf": [
                {
                  "required": [
                    "id"
                  ]
                },
                {
                  "required": [
                    "doi"
                  ]
                }
              ],
              "properties": {
                "cite_limit": {
                  "default": "25",
                  "description": "max citing works (0-100)",
                  "type": "string"
                },
                "doi": {
                  "description": "alias for id (DOI form)",
                  "type": "string"
                },
                "id": {
                  "description": "arXiv id, DOI, OpenAlex id, or PMID",
                  "type": "string"
                },
                "ref_limit": {
                  "default": "25",
                  "description": "max references (0-100)",
                  "type": "string"
                }
              },
              "required": [],
              "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"
    }
  }
}

Use it

curl

curl "https://api.kadec0.xyz/v1/paper-details"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.kadec0.xyz/v1/paper-details");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.kadec0.xyz/v1/paper-details")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/334.json, and this resource appears in /discovery/resources and /discovery/search.