Find and deduplicate scholarly papers from Crossref and Europe PMC
Find and deduplicate scholarly papers from Crossref and Europe PMC. Use for literature discovery with DOI source links.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
332 msmedian answer time
$0.01listed price per call
$0.01price 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
POST https://evidence402.onrender.com/api/v1/search
| Category | Search and research |
|---|---|
| Provider host | evidence402.onrender.com |
| Networks | eip155:84532 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.01 | 332 ms |
Example input (from the provider)
{
"body": {
"limit": 5,
"query": "semaglutide obesity"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"fromYear": {
"maximum": 2026,
"minimum": 1900,
"type": "integer"
},
"limit": {
"default": 10,
"maximum": 20,
"minimum": 1,
"type": "integer"
},
"query": {
"maxLength": 250,
"minLength": 3,
"type": "string"
}
},
"required": [
"query"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"papers": {
"items": {
"type": "object"
},
"type": "array"
},
"query": {
"type": "string"
}
},
"type": "object"
},
"requestId": {
"type": "string"
},
"service": {
"type": "string"
}
},
"required": [
"requestId",
"service",
"data"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}