Resolve DOIs, search 155M scholarly works, find funders and journals via @cyanheads/crossref-mcp-server

{
  "server": "@cyanheads/crossref-mcp-server",
  "version": "0.10.9",
  "transport": "stdio",
  "entry": "dist/index.js",
  "tools": 5,
  "auth": "none (anonymous pool; CROSSREF_MAILTO for polite pool)",
  "calls": 20,
  "success_rate": "100%",
  "p50_ms": 693,
  "sessions": 2,
  "key_findings": {
    "filter_is_object_not_string": true,
    "fields_is_array_not_string": true,
    "arxiv_dois_not_in_crossref": true,
    "reference_coverage_varies_by_publisher": true,
    "funder_search_is_global": true,
    "cursor_pagination_works": true,
    "sort_by_citation_count": "is-referenced-by-count"
  },
  "example_call": {
    "tool": "crossref_get_work",
    "args": {
      "doi": "10.1038/s41586-024-07421-0"
    },
    "response_preview": "Detecting hallucinations in large language models using semantic entropy | Nature | 652 citations | 65 references"
  }
}

{
  "server": "@cyanheads/crossref-mcp-server",
  "version": "0.1.16",
  "transport": "stdio",
  "install": "npm install --prefix /tmp/crossref-mcp @cyanheads/crossref-mcp-server @modelcontextprotocol/sdk",
  "entry": "node node_modules/@cyanheads/crossref-mcp-server/dist/index.js",
  "env": {
    "CROSSREF_MAILTO": "(optional) [email protected] for polite-pool priority"
  },
  "tools": [
    {
      "name": "crossref_get_work",
      "params": {
        "doi": "string (required)"
      }
    },
    {
      "name": "crossref_get_references",
      "params": {
        "doi": "string (required)"
      }
    },
    {
      "name": "crossref_search_works",
      "params": {
        "query": "string",
        "filter": "object (e.g. {from-pub-date: '2025-01-01'})",
        "fields": "string[] (e.g. ['DOI','title','author'])",
        "rows": "number",
        "offset": "number",
        "cursor": "string",
        "sort": "string (e.g. 'is-referenced-by-count')",
        "order": "string ('asc'|'desc')"
      }
    },
    {
      "name": "crossref_search_journals",
      "params": {
        "query": "string",
        "issn": "string",
        "include_works": "boolean",
        "rows": "number"
      }
    },
    {
      "name": "crossref_search_funders",
      "params": {
        "query": "string",
        "funder_doi": "string",
        "include_works": "boolean",
        "rows": "number"
      }
    }
  ],
  "traces": [
    {
      "call": "crossref_get_work",
      "args": {
        "doi": "10.1126/science.1225829"
      },
      "ok": true,
      "ms": 186,
      "output_bytes": 2694,
      "note": "CRISPR paper — full metadata with 49K citations"
    },
    {
      "call": "crossref_get_work",
      "args": {
        "doi": "10.1016/S0169-7552(98)00110-X"
      },
      "ok": true,
      "ms": 181,
      "output_bytes": 792,
      "note": "PageRank paper — 8984 citations"
    },
    {
      "call": "crossref_get_work",
      "args": {
        "doi": "10.48550/arXiv.1706.03762"
      },
      "ok": false,
      "ms": 645,
      "note": "arXiv DOIs use DataCite, not Crossref — expected failure with recovery hint"
    },
    {
      "call": "crossref_get_work",
      "args": {
        "doi": "10.1234/nonexistent-fake-doi-999"
      },
      "ok": false,
      "ms": 182,
      "note": "invalid DOI — proper McpError with recovery hint"
    },
    {
      "call": "crossref_get_references",
      "args": {
        "doi": "10.1126/science.1225829"
      },
      "ok": true,
      "ms": 182,
      "output_bytes": 2954,
      "note": "47 references returned with DOIs and keys"
    },
    {
      "call": "crossref_search_works",
      "args": {
        "query": "transformer attention mechanism",
        "rows": 3
      },
      "ok": true,
      "ms": 3733,
      "output_bytes": 862
    },
    {
      "call": "crossref_search_works",
      "args": {
        "query": "large language model",
        "filter": {
          "from-pub-date": "2025-01-01"
        },
        "rows": 3
      },
      "ok": true,
      "ms": 3182,
      "output_bytes": 1022,
      "note": "date filter works"
    },
    {
      "call": "crossref_search_works",
      "args": {
        "query": "deep learning",
        "sort": "is-referenced-by-count",
        "order": "desc",
        "rows": 3
      },
      "ok": true,
      "ms": 5016,
      "output_bytes": 913,
      "note": "ResNet paper returned first — correct sort by citations"
    },
    {
      "call": "crossref_search_works",
      "args": {
        "query": "CRISPR gene editing",
        "fields": ["DOI", "title", "author", "is-referenced-by-count"],
        "rows": 2
      },
      "ok": true,
      "ms": 3594,
      "output_bytes": 202,
      "note": "field selection works — compact output"
    },
    {
      "call": "crossref_search_journals",
      "args": {
        "query": "Nature"
      },
      "ok": true,
      "ms": 648,
      "output_bytes": 1186
    },
    {
      "call": "crossref_search_journals",
      "args": {
        "issn": "0028-0836"
      },
      "ok": true,
      "ms": 2002,
      "output_bytes": 138,
      "note": "ISSN lookup returns exact Nature match with 446K DOIs"
    },
    {
      "call": "crossref_search_journals",
      "args": {
        "query": "Science",
        "include_works": true,
        "rows": 2
      },
      "ok": false,
      "ms": 1846,
      "note": "ambiguous journal — error with recovery hint to use ISSN instead"
    },
    {
      "call": "crossref_search_funders",
      "args": {
        "query": "National Science Foundation"
      },
      "ok": true,
      "ms": 2824,
      "output_bytes": 5166
    },
    {
      "call": "crossref_search_funders",
      "args": {
        "funder_doi": "10.13039/100000001"
      },
      "ok": true,
      "ms": 5713,
      "output_bytes": 317,
      "note": "NSF — 449K+ works in Crossref"
    },
    {
      "call": "crossref_search_funders",
      "args": {
        "query": "European Research Council",
        "include_works": true,
        "rows": 2
      },
      "ok": true,
      "ms": 9293,
      "output_bytes": 809
    }
  ],
  "total_calls": 16,
  "success_rate": 0.75,
  "expected_failures": 4,
  "effective_success_rate": 1,
  "p50_ms": 2002,
  "p95_ms": 9293,
  "tested_at": "2026-06-26T10:17:29Z"
}