Resolve | Anara API

POST /v1/resolve resolves up to 100 identifiers and 50 titles in one call. It needs the papers scope.

Lookups are free up to 5,000 per calendar month per workspace. After that they cost $0.10 per 1,000. One call is one lookup, whatever it contains.

Request

field	type	notes
`identifiers`	`string[]`	DOI (`10.1038/...`), arXiv (`arXiv:2106.09685` or `2106.09685`), OpenAlex (`W2963403868`), PubMed (`pmid:31234567`). Max 100.
`titles`	`string[]`	Exact or near-exact titles. Max 50.
`maxResults`	`int`	Cap on papers returned. Default 10, max 100.

Send at least one of identifiers or titles.

curl -X POST https://api.anara.com/v1/resolve \
  -H "Authorization: Bearer $ANARA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"identifiers": ["10.1038/s41586-020-2649-2", "arXiv:1706.03762"]}'

Response

{
  "papers": [
    {
      "id": "W3103145119",
      "title": "Array programming with NumPy",
      "year": 2020,
      "doi": "10.1038/s41586-020-2649-2",
      "authors": ["Charles R. Harris"],
      "citedByCount": 12000,
      "openAccess": true,
      "hasFulltext": true
    },
    {
      "id": "W2963403868",
      "title": "Attention Is All You Need",
      "authors": ["Ashish Vaswani"],
      "year": 2017,
      "arxivId": "1706.03762",
      "citedByCount": 100000,
      "openAccess": true,
      "hasFulltext": true
    }
  ],
  "resolutions": [
    {
      "input": "10.1038/s41586-020-2649-2",
      "status": "resolved",
      "paperIds": ["W3103145119"]
    },
    {
      "input": "arXiv:1706.03762",
      "status": "resolved",
      "paperIds": ["W2963403868"]
    }
  ],
  "charge": { "costMicroUsd": 0, "balanceMicroUsd": 10000000 }
}

resolutions has one entry per input. status is resolved, ambiguous (a title matched more than one paper; all ids are listed), or unresolved.

Each paper includes venue, publicationDate (the full indexed date, not just year), field, language, arxivId, pmcid, and pmid alongside doi when available. Missing metadata is omitted. openAlexId is not exposed.