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Research Paper & DOI Lookup (Crossref)

Official registry Search and web

Verify a DOI or find papers via Crossref metadata. $0.005/call via x402.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http research-paper-doi-lookup-crossref 'https://paper-lookup-production-56b0.up.railway.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "research-paper-doi-lookup-crossref": {
            "type": "http",
            "url": "https://paper-lookup-production-56b0.up.railway.app/mcp"
        }
    }
}

Frequently asked questions

What is Research Paper & DOI Lookup (Crossref)?

Verify a DOI or find papers via Crossref metadata. $0.005/call via x402.

How do I install Research Paper & DOI Lookup (Crossref)?

It runs as a remote server. In Claude Code: claude mcp add --transport http research-paper-doi-lookup-crossref 'https://paper-lookup-production-56b0.up.railway.app/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Research Paper & DOI Lookup (Crossref) need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Research Paper & DOI Lookup (Crossref) open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Research Paper & DOI Lookup (Crossref)?

It is published by pcp183. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.