research · scholarly-search · research-papers · doi-search · publication-metadata · citations · crossref · open-data

Crossref scholarly work search

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.

$0.008 USDCBase + Solanax402 v2POST
Pay $0.008 USDC and run in your browserView free result sample

Endpoint

https://apiacre.com/v1/research/crossref-work-search

Send the JSON body below. An unpaid request returns HTTP 402 with a PAYMENT-REQUIRED header; an x402-compatible buyer signs the requirement and retries with PAYMENT-SIGNATURE.

Pay $0.008 USDC and run in your browser

Official Coinbase agent path

Coinbase Agentic Wallet can satisfy this x402 request in one command. Running it may pay automatically, so --max-amount is fixed to $0.008 USDC in atomic units. Copying the command does not install, authenticate, sign, or pay; review the request and use a separate low-value wallet before running it.

npx --yes awal@latest x402 pay https://apiacre.com/v1/research/crossref-work-search \
  -X POST \
  -d '{"query":"agentic commerce payment protocols","max_results":5,"work_type":"journal-article","sort_by":"relevance"}' \
  --max-amount 8000 \
  --json

Coinbase pay-for-service documentation · Buyer setup and wallet safety

Alternative third-party AgentCash commands

Run check first without payment. Its fetch command may automatically pay up to the exact listed price.

npx --yes agentcash@latest check https://apiacre.com/v1/research/crossref-work-search
npx --yes agentcash@latest fetch https://apiacre.com/v1/research/crossref-work-search \
  --method POST \
  --header 'content-type: application/json' \
  --body '{"query":"agentic commerce payment protocols","max_results":5,"work_type":"journal-article","sort_by":"relevance"}' \
  --payment-protocol x402 \
  --payment-network base \
  --max-amount 0.008

AgentCash CLI documentation

Input example

{
  "query": "agentic commerce payment protocols",
  "max_results": 5,
  "work_type": "journal-article",
  "sort_by": "relevance"
}

Response shape

View free static sample JSON

{
  "request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
  "service": "research.crossref-work-search",
  "version": "1",
  "data": {
    "query": {
      "bibliographic": "agentic commerce payment protocols",
      "workType": "journal-article",
      "publishedFrom": null,
      "publishedUntil": null,
      "sortBy": "relevance"
    },
    "totalResults": 1,
    "resultsReturned": 1,
    "results": [
      {
        "doi": "10.1000/apiacre.example",
        "title": "A bounded example scholarly work",
        "type": "journal-article",
        "publishedDate": "2026-08-20",
        "authors": [
          {
            "name": "Ada Example",
            "given": "Ada",
            "family": "Example",
            "orcid": null,
            "affiliations": [
              "Example Institute"
            ]
          }
        ],
        "publisher": "Example Publisher",
        "containerTitle": "Agent Systems",
        "subjects": [
          "Software agents"
        ],
        "language": "en",
        "doiUrl": "https://doi.org/10.1000/apiacre.example",
        "resourceUrl": "https://api.crossref.org/works/10.1000%2Fapiacre.example",
        "referenceCount": 8,
        "citedByCount": 12,
        "issn": [
          "0000-0000"
        ],
        "isbn": [],
        "licenses": [],
        "updates": []
      }
    ],
    "source": "https://api.crossref.org/works",
    "retrievedAt": "2026-08-20T12:00:00+00:00",
    "documentation": "https://www.crossref.org/documentation/retrieve-metadata/rest-api/",
    "metadataLicense": {
      "name": "Open bibliographic metadata / Crossref-generated data CC0",
      "url": "https://www.crossref.org/documentation/retrieve-metadata/",
      "abstractsReturned": false
    },
    "limitations": [
      "Demonstration metadata only; paid calls return current publisher-deposited records.",
      "Abstracts and full text are deliberately excluded."
    ]
  },
  "meta": {
    "duration_ms": 42,
    "cached": false,
    "sources": [],
    "warnings": [],
    "next_actions": [
      {
        "service": "research.crossref-doi-metadata",
        "title": "Crossref DOI metadata enrichment",
        "reason": "Resolve one selected scholarly-search candidate into a focused current DOI metadata record.",
        "method": "POST",
        "path": "/v1/research/crossref-doi-metadata",
        "price": "$0.003",
        "input_template": {
          "doi": "$result.data.results[0].doi"
        },
        "use_output": "Continue only after selecting the intended result; inspect correction or update links and source limitations before relying on the record.",
        "handoff_path": "/catalog/research.crossref-doi-metadata",
        "checkout_path": "/try/research.crossref-doi-metadata",
        "sample_path": "/samples/research.crossref-doi-metadata",
        "maximum_atomic_usdc": "3000",
        "handoff_payment_required": false,
        "executes_automatically": false,
        "authorization_required": true
      }
    ]
  }
}

Continue this workflow

These optional follow-ups use this result in a larger workflow. Each call shows a fresh x402 challenge and requires separate buyer authorization.

Try the payment challenge

curl -i -X POST 'https://apiacre.com/v1/research/crossref-work-search' \
  -H 'content-type: application/json' \
  --data '{"query":"agentic commerce payment protocols","max_results":5,"work_type":"journal-article","sort_by":"relevance"}'