Academic literature from Crossref, the DOI registry itself
Academic literature from Crossref, the DOI registry itself. Search by topic, author or exact DOI and get normalised records with citation counts, journal, publisher, authors with affiliations, and an open-access flag, plus a cohort view: median citations, most-cited work and the year range. Filter by minimum citations, publication year or open access only.
10000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-24
updated
Provider
x402-filings.datalayer.workers.dev · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x917e635b83F0dd7e8172c55EC4EEbb28B734cA85",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 60
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"author": "Doudna",
"doi": "10.1126/science.1225829",
"fromYear": 2020,
"limit": 25,
"minCitations": 0,
"openAccessOnly": false,
"q": "CRISPR"
},
"type": "http"
},
"output": {
"example": {
"analysis": {
"medianCitations": 14,
"mostCited": "A programmable dual-RNA-guided DNA endonuclease",
"openAccessCount": 11,
"yearRange": [
2019,
2026
]
},
"count": 25,
"query": {
"limit": 25,
"q": "CRISPR"
},
"totalMatching": 49407,
"works": [
{
"authors": [
{
"affiliation": "UC Berkeley",
"name": "Martin Jinek"
}
],
"citations": 18422,
"doi": "10.1126/science.1225829",
"journal": "Science",
"openAccess": true,
"title": "A programmable dual-RNA-guided DNA endonuclease",
"url": "https://doi.org/10.1126/science.1225829",
"year": 2012
}
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"author": {
"description": "Author name search.",
"examples": [
"Doudna"
],
"type": "string"
},
"doi": {
"description": "Exact DOI lookup. Returns that single work.",
"examples": [
"10.1126/science.1225829"
],
"type": "string"
},
"fromYear": {
"description": "Only works published in or after this year.",
"examples": [
2020
],
"type": "integer"
},
"limit": {
"description": "Max works, 1-100. Default 25.",
"examples": [
25
],
"type": "integer"
},
"minCitations": {
"description": "Minimum citation count.",
"examples": [
0
],
"type": "integer"
},
"openAccessOnly": {
"description": "Only openly-licensed works.",
"examples": [
false
],
"type": "boolean"
},
"q": {
"description": "Search across title and abstract.",
"examples": [
"CRISPR"
],
"type": "string"
}
},
"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://x402-filings.datalayer.workers.dev/v1/research/papers" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://x402-filings.datalayer.workers.dev/v1/research/papers");
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://x402-filings.datalayer.workers.dev/v1/research/papers")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/6089.json, and this resource appears in /discovery/resources and /discovery/search.