How to query DOIs in a given field with api.datacite.org/dois?query={field}:{keyword}?

If you want to query for DOIs in a given field with a keyword, you can use the following URL templates:

https://api.datacite.org/dois?query={field}:{keyword}

For example:

fyicenter$ curl 'https://api.datacite.org/dois?query=titles.title:covid-19' 

{
  "data": [
    {
      "attributes": {
        "citationCount": 0,
        "container": {},
        "contentUrl": null,
        "contributors": [],
        "created": "2022-10-10T00:44:23Z",
        "creators": [
          {
            "affiliation": [],
            "familyName": "Islam",
            "givenName": "Md Khairul",
            "name": "Islam, Md Khairul",
            "nameIdentifiers": [],
            "nameType": "Personal"
          },
          {
            "affiliation": [],
            "familyName": "Zhu",
            "givenName": "Di",
            "name": "Zhu, Di",
            "nameIdentifiers": [],
            "nameType": "Personal"
          },
          ...
        ],
        "dates": [
          {
            "date": "2022-10-06T23:45:37Z",
            "dateInformation": "v1",
            "dateType": "Submitted"
          },
          ...
        ],
        "descriptions": [
          {
            "description": "Interpretable machine learning plays a key role 
in healthcare because it is challenging in understanding feature importance 
in deep learning model predictions. ...",
            "descriptionType": "Abstract"
          }
        ],
        "doi": "10.48550/arxiv.2210.03258",
        "downloadCount": 0,
        "formats": [],
        "fundingReferences": [],
        "geoLocations": [],
        "identifiers": [
          {
            "identifier": "2210.03258",
            "identifierType": "arXiv"
          }
        ],
        "isActive": true,
        "language": null,
        "metadataVersion": 0,
        "partCount": 0,
        "partOfCount": 0,
        "publicationYear": 2022,
        "published": null,
        "publisher": "arXiv",
        "reason": null,
        "referenceCount": 0,
        "registered": "2022-10-10T00:44:23Z",
        "relatedIdentifiers": [],
        "rightsList": [
          {
            "rights": "Creative Commons Attribution 4.0 International",
            "rightsIdentifier": "cc-by-4.0",
            "rightsIdentifierScheme": "SPDX",
            "rightsUri": "https://creativecommons.org/licenses/by/4.0/legalcode",
            "schemeUri": "https://spdx.org/licenses/"
          }
        ],
        "schemaVersion": "http://datacite.org/schema/kernel-4",
        "sizes": [],
        "source": "mds",
        "state": "findable",
        "subjects": [
          {
            "lang": "en",
            "subject": "Machine Learning (cs.LG)",
            "subjectScheme": "arXiv"
          },
          ...
        ],
        "titles": [
          {
            "title": "Interpreting County Level COVID-19 Infection and Feature Sensitivity using Deep Learning Time Series Models"
          }
        ],
        "types": {
          "bibtex": "misc",
          "citeproc": "article",
          "resourceType": "Article",
          "resourceTypeGeneral": "Preprint",
          "ris": "GEN",
          "schemaOrg": "CreativeWork"
        },
        "updated": "2022-10-10T00:44:23Z",
        "url": "https://arxiv.org/abs/2210.03258",
        "version": "1",
        "versionCount": 0,
        "versionOfCount": 0,
        "viewCount": 0
      },
      "id": "10.48550/arxiv.2210.03258",
      "relationships": {
        "client": {
          "data": {
            "id": "arxiv.content",
            "type": "clients"
          }
        }
      },
      "type": "dois"
    },
...

⇒ api.datacite.org/prefixes - Query Publishers

⇐ api.datacite.org/dois?query={keyword} - Query All Fields

⇑ DataCite.org DOI Database

⇑⇑ DOI - Frequently Asked Questions