API Acre
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.
Offering
- Provider
- apiacre.com
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Science And Education
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://apiacre.com/v1/research/crossref-work-search- MIME type
- Not provided
- First seen
- 2026-10-16T01:51:10.599Z
- Last seen
- Tags
- scholarly-search, research-papers, doi-search, publication-metadata, citations
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.008 USDC
Atomic price: 8000 · Network: eip155:8453 · Asset: USDC · Scheme: exact - Payment option 2
- 0.008 USDC
Atomic price: 8000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "8000",
"payTo": "0xa0BFa4f07281c9b248DC3AED2217836BcA24869B"
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "8000",
"payTo": "B4CHWQeQn7GDLZD2aW6hpGG2bEseisBFLZYECA3HDLan"
}
]Observed health
- Status
- Reachable
- Latest latency
- 1340 ms
- Average latency
- 997 ms
- HTTP status
- 405
- Last checked
- Reachability
- 100% over 14 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"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 schema
{
"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"
}