CiteStamp

Ground citations before your agent emits them.

CiteStamp is a free citation-health tool for researchers: it checks references against the public scholarly registries (Crossref, DataCite, OpenAlex) and flags the ones that do not resolve to a known work or that a publisher has marked retracted — the hallucinated-citation failure mode LLM users keep hitting.

This repo is the install guide for the hosted MCP server over CiteStamp's CC0 citation graph. There is nothing to build or run locally — the server is remote.

Endpoint	https://mcp.citestamp.com/mcp
Transport	streamable-http
Protocol	2025-06-18
Auth	None to start — anonymous at 10 req/min per IP. An optional free key (email [email protected]) raises to 60/min; Pro to 600/min
Data	CC0 citation graph; human-signed and machine-inferred claims kept strictly apart

The five tools (all read-only)

• what_supports / what_refutes — typed edges bearing on a claim
• what_cites / references_of — the citing and cited works around a reference
• edges_about — edges on a topic

Every result carries its tier: accountable edges are signed by a human identity (ORCID); inferred edges are machine-derived. Your agent can ask for signed-only.

Add it to your client

Replace YOUR_KEY with your API key in each snippet.

Claude (claude.ai / Desktop)

Settings → Connectors → Add custom connector → URL https://mcp.citestamp.com/mcp → add header Authorization: Bearer YOUR_KEY.

Claude Code

claude mcp add --transport http citestamp https://mcp.citestamp.com/mcp \
  --header "Authorization: Bearer YOUR_KEY"

Cursor (~/.cursor/mcp.json)

{ "mcpServers": { "citestamp": {
    "url": "https://mcp.citestamp.com/mcp",
    "headers": { "Authorization": "Bearer YOUR_KEY" } } } }

Cline (MCP settings)

{ "mcpServers": { "citestamp": {
    "type": "streamableHttp",
    "url": "https://mcp.citestamp.com/mcp",
    "headers": { "Authorization": "Bearer YOUR_KEY" } } } }

VS Code (.vscode/mcp.json)

{ "servers": { "citestamp": {
    "type": "http",
    "url": "https://mcp.citestamp.com/mcp",
    "headers": { "Authorization": "Bearer YOUR_KEY" } } } }

Gemini CLI (~/.gemini/settings.json)

{ "mcpServers": { "citestamp": {
    "httpUrl": "https://mcp.citestamp.com/mcp",
    "headers": { "Authorization": "Bearer YOUR_KEY" } } } }

If a snippet drifts from your client's current config schema, your client's MCP docs win — the endpoint and header are the stable parts.

What this is not

CiteStamp reports what public registries say at a dated point in time. It does not judge the truth or quality of any work, and its only verdict vocabulary is "does not resolve to a known work" and "marked retracted by the publisher". Statements about works, never about people.

Links

• Integration guide + REST API: https://citestamp.com/for-ai
• Check a bibliography in the browser (free, nothing uploaded): https://citestamp.com/check
• Reference-health badge for any DOI: https://citestamp.com/citestamped/
• Privacy: https://citestamp.com/privacy · Contact: [email protected]

CiteStamp is built by 3Rivers Enterprises LLC, Fort Wayne, Indiana.