Search open Crossref bibliographic metadata by title, author, DOI fragment, or c
Search open Crossref bibliographic metadata by title, author, DOI fragment, or citation and return bounded normalized publication, author, citation, license, and update metadata without abstracts or full text.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
348 msmedian answer time
$0.008listed price per call
$0.008price 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://apiacre.com/v1/research/crossref-work-search
| Category | Search and research |
|---|---|
| Provider host | apiacre.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.008 | 348 ms |
Example input (from the provider)
{
"body": {
"max_results": 5,
"query": "agentic commerce payment protocols",
"sort_by": "relevance",
"work_type": "journal-article"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"max_results": {
"type": "integer"
},
"published_from": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"published_until": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"query": {
"type": "string"
},
"sort_by": {
"enum": [
"relevance",
"newest",
"most_cited"
],
"type": "string"
},
"work_type": {
"anyOf": [
{
"enum": [
"book",
"book-chapter",
"dataset",
"dissertation",
"journal-article",
"monograph",
"posted-content",
"proceedings-article",
"report",
"standard"
],
"type": "string"
},
{
"type": "null"
}
]
}
},
"required": [
"query"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"documentation": {
"type": "string"
},
"limitations": {
"items": {},
"type": "array"
},
"metadataLicense": {
"type": "object"
},
"query": {
"type": "object"
},
"results": {
"items": {},
"type": "array"
},
"resultsReturned": {
"type": "integer"
},
"retrievedAt": {
"type": "string"
},
"source": {
"type": "string"
},
"totalResults": {
"type": "integer"
}
},
"type": "object"
},
"meta": {
"properties": {
"cached": {
"type": "boolean"
},
"duration_ms": {
"type": "integer"
},
"next_actions": {
"items": {
"type": "object"
},
"type": "array"
},
"sources": {
"items": {
"type": "string"
},
"type": "array"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"duration_ms",
"cached",
"sources",
"warnings",
"next_actions"
],
"type": "object"
},
"request_id": {
"type": "string"
},
"service": {
"type": "string"
},
"version": {
"type": "string"
}
},
"required": [
"request_id",
"service",
"version",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}