Academic and scientific paper search API
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.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
185 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.kadec0.xyz/v1/papers
| Category | Search and research |
|---|---|
| Provider host | api.kadec0.xyz |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 228 from 5 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 185 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"maxItems": "10",
"q": "transformer attention",
"sort": "citations",
"source": "all"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}