Unbrowse for Crossref (crossref.org)

Crossref as tools for your agent. Unofficial: not affiliated with or endorsed by crossref.org. Unbrowse compiled these from crossref.org's own requests: each call replays the site's first-party API server-side and returns a verified result. No scraping of rendered pages, no browser on your side, no crossref.org API key.

Connect the crossref.org MCP

This server is a tool scope holding only crossref.org: its compiled tools plus the Unbrowse tools that run them, so the agent's tool list stays small and every call stays on crossref.org.

claude mcp add --transport http crossref https://unbrowse.ai/mcp/crossref.org
codex mcp add crossref --url https://unbrowse.ai/mcp/crossref.org && codex mcp login crossref

{"mcpServers":{"crossref":{"url":"https://unbrowse.ai/mcp/crossref.org"}}}

The first connect signs in to Unbrowse with OAuth (free tier, only verified results count). For scripts, send Authorization: Bearer $UNBROWSE_API_KEY (key from https://unbrowse.ai/app/keys; keep it in a secret manager, never in config you commit).