Who maintains crossref-mcp-server?

crossref-mcp-server is maintained by cyanheads, which publishes 131 MCP servers (2112 total versions) tracked on MCP Toplist.

Is crossref-mcp-server listed on the Official MCP Registry?

Yes — crossref-mcp-server is listed on the Official MCP Registry, alongside PulseMCP and Glama.

How many versions does crossref-mcp-server have?

MCP Toplist tracks 27 versions of crossref-mcp-server, most recently published on Aug 25, 2026.

Where can I find the source code for crossref-mcp-server?

The source code for crossref-mcp-server is hosted at github.com/cyanheads/crossref-mcp-server.

SERVER

crossref-mcp-server

Rank #2,779

io.github.cyanheads/crossref-mcp-server

Resolve DOIs, search ~155M scholarly works, and fetch references via the Crossref REST API.

27 versions

3 GitHub stars

by cyanheads (131 servers)View repository ↗Claim this server

First listed

May 23, 2026

Last publish date

Aug 25, 2026

OVERVIEW

crossref-mcp-server is a Model Context Protocol (MCP) server published by cyanheads. It ranks #2,779 of 121,933 servers tracked on MCP Toplist, and its repository has 3 GitHub stars. crossref-mcp-server is listed across 3 registries — Official MCP, PulseMCP and Glama, with 27 tracked versions. It was first listed on May 23, 2026 and most recently updated on Aug 25, 2026.

STANDING

#2,779of 121,933 tracked serversTop 5%

Ranks ahead of 119,154 of 121,933 servers on MCP Toplist.

CONNECT

Use crossref-mcp-server

No setupRuns out of the box

No credentials or required configuration declared — add it to your MCP client and go.

npm package

claude mcp add crossref-mcp-server -e "CROSSREF_MAILTO=<your CROSSREF_MAILTO>" -e "CROSSREF_BASE_URL=<your CROSSREF_BASE_URL>" -e "CROSSREF_TIMEOUT_MS=<your CROSSREF_TIMEOUT_MS>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y @cyanheads/crossref-mcp-server run start:stdio

Replace each placeholder with your own value before saving.

npm package

claude mcp add crossref-mcp-server -e "CROSSREF_MAILTO=<your CROSSREF_MAILTO>" -e "CROSSREF_BASE_URL=<your CROSSREF_BASE_URL>" -e "CROSSREF_TIMEOUT_MS=<your CROSSREF_TIMEOUT_MS>" -e "MCP_HTTP_HOST=<your MCP_HTTP_HOST>" -e "MCP_HTTP_PORT=<your MCP_HTTP_PORT>" -e "MCP_HTTP_ENDPOINT_PATH=<your MCP_HTTP_ENDPOINT_PATH>" -e "MCP_AUTH_MODE=<your MCP_AUTH_MODE>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y @cyanheads/crossref-mcp-server run start:http

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.crossref-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/crossref-mcp-server", "run", "start:stdio"]

[mcp_servers.crossref-mcp-server.env]
CROSSREF_MAILTO = "<your CROSSREF_MAILTO>"
CROSSREF_BASE_URL = "<your CROSSREF_BASE_URL>"
CROSSREF_TIMEOUT_MS = "<your CROSSREF_TIMEOUT_MS>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

[mcp_servers.crossref-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/crossref-mcp-server", "run", "start:http"]

[mcp_servers.crossref-mcp-server.env]
CROSSREF_MAILTO = "<your CROSSREF_MAILTO>"
CROSSREF_BASE_URL = "<your CROSSREF_BASE_URL>"
CROSSREF_TIMEOUT_MS = "<your CROSSREF_TIMEOUT_MS>"
MCP_HTTP_HOST = "<your MCP_HTTP_HOST>"
MCP_HTTP_PORT = "<your MCP_HTTP_PORT>"
MCP_HTTP_ENDPOINT_PATH = "<your MCP_HTTP_ENDPOINT_PATH>"
MCP_AUTH_MODE = "<your MCP_AUTH_MODE>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "crossref-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "crossref-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "crossref-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/crossref-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CROSSREF_MAILTO": "<your CROSSREF_MAILTO>",
        "CROSSREF_BASE_URL": "<your CROSSREF_BASE_URL>",
        "CROSSREF_TIMEOUT_MS": "<your CROSSREF_TIMEOUT_MS>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.cyanheads%2Fcrossref-mcp-server.svg)](https://mcptoplist.com/server/io.github.cyanheads%2Fcrossref-mcp-server)

HTML

<a href="https://mcptoplist.com/server/io.github.cyanheads%2Fcrossref-mcp-server"><img src="https://mcptoplist.com/badge/io.github.cyanheads%2Fcrossref-mcp-server.svg" alt="MCP Toplist: Top 5% of 121,933" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

REGISTRIES

Listed on 3 registries

Official MCP

PulseMCP

Glama

ORGANIZATION

cyanheads

Organization

cyanheads

Servers in org

131

Versions across org

2112

Other servers by cyanheads

View all cyanheads servers →

VERSIONS

Available versions (27)

Version	Published
0.3.11	Aug 25, 2026
0.3.10	Aug 25, 2026
0.3.9	Aug 10, 2026
0.3.8	Aug 10, 2026
0.3.7	Aug 10, 2026
0.3.6	Aug 10, 2026
0.3.5	Aug 9, 2026
0.3.4	Aug 9, 2026
0.3.3	Aug 7, 2026
0.3.2	Aug 7, 2026
0.3.1	Aug 7, 2026
0.3.0	Aug 7, 2026
0.2.1	Aug 7, 2026
0.2.0	Jul 13, 2026
0.1.17	Jul 13, 2026
0.1.16	Jun 20, 2026
0.1.15	Jun 16, 2026
0.1.14	Jun 12, 2026
0.1.13	Jun 4, 2026
0.1.12	Jun 2, 2026
0.1.11	Jun 1, 2026
0.1.10	May 30, 2026
0.1.9	May 29, 2026
0.1.8	May 24, 2026
0.1.7	May 24, 2026
0.1.6	May 23, 2026
0.1.5	May 23, 2026

FAQ

Frequently asked questions

Who maintains crossref-mcp-server?: crossref-mcp-server is maintained by cyanheads, which publishes 131 MCP servers (2112 total versions) tracked on MCP Toplist.
Is crossref-mcp-server listed on the Official MCP Registry?: Yes — crossref-mcp-server is listed on the Official MCP Registry, alongside PulseMCP and Glama.
How many versions does crossref-mcp-server have?: MCP Toplist tracks 27 versions of crossref-mcp-server, most recently published on Aug 25, 2026.
Where can I find the source code for crossref-mcp-server?: The source code for crossref-mcp-server is hosted at github.com/cyanheads/crossref-mcp-server.

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