Check up to ten DOI citations against source registries, compare optional titles
Check up to ten DOI citations against source registries, compare optional titles, and expose publication update signals. Use to detect incorrect references.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
336 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
POST https://evidence402.onrender.com/api/v1/verify
| Category | Everything else |
|---|---|
| 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 | $0.02 | 336 ms |
Example input (from the provider)
{
"body": {
"citations": [
{
"doi": "10.1056/NEJMoa2032183",
"title": "Once-Weekly Semaglutide in Adults with Overweight or Obesity"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$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": {
"citations": {
"items": {
"additionalProperties": false,
"properties": {
"doi": {
"maxLength": 200,
"minLength": 7,
"type": "string"
},
"title": {
"maxLength": 500,
"minLength": 3,
"type": "string"
}
},
"required": [
"doi"
],
"type": "object"
},
"maxItems": 10,
"minItems": 1,
"type": "array"
}
},
"required": [
"citations"
],
"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": {
"citations": {
"items": {
"type": "object"
},
"type": "array"
}
},
"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"
}