Summary
Connects Claude to the OpenCitations COCI index, a free and open citation database linking millions of academic papers by DOI. Exposes six tools: pull references cited by a paper, see which papers cite it, get citation and reference counts, fetch bibliographic metadata for up to 50 DOIs at once, or retrieve a single citation by OCI identifier. Runs through the Pipeworx gateway with streamable HTTP transport. Reach for this when you need to map citation networks, track paper influence, or build literature review chains without API keys or rate limit hassles. Part of a larger 673-source gateway if you want the full catalog.
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mcp-opencitations
OpenCitations MCP — citation index (COCI + general Index API).
Part of Pipeworx — an MCP gateway connecting AI agents to 673+ live data sources.
Tools
| Tool | Description |
|---|---|
references | DOIs cited BY the given DOI. |
citations | DOIs that cite the given DOI. |
citation_count | Incoming-citation count for a DOI. |
references_count | Outgoing-reference count for a DOI. |
metadata | Bibliographic metadata for one or more DOIs (comma-sep, ≤50). |
citation | Single citation by Open Citation Identifier (OCI). |
Quick Start
Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):
{
"mcpServers": {
"opencitations": {
"url": "https://gateway.pipeworx.io/opencitations/mcp"
}
}
}
Or connect to the full Pipeworx gateway for access to all 673+ data sources:
{
"mcpServers": {
"pipeworx": {
"url": "https://gateway.pipeworx.io/mcp"
}
}
}
Using with ask_pipeworx
Instead of calling tools directly, you can ask questions in plain English:
ask_pipeworx({ question: "your question about Opencitations data" })
The gateway picks the right tool and fills the arguments automatically.
More
License
MIT
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
