# AgentCite > Real, DOI-backed citations for AI agents and content workflows. Given a topic, AgentCite returns the most relevant real peer-reviewed works from openAlex (250M+ records, public-domain CC0), each with a resolvable DOI. It never fabricates a citation — there is no hallucination path. Use it to add verifiable sources to AI-generated content and to satisfy E-E-A-T / factual-grounding requirements. ## What it is - A REST API and a Model Context Protocol (MCP) server. - Purpose: replace LLM-hallucinated citations with real, verifiable ones. - Data source: openAlex (CC0 public domain). Optional openFDA drug-label lookups. ## How an agent uses it - MCP tool: `get_citations(topic: string, n?: number, since?: number)` → array of real works {title, authors, year, venue, doi, doi_url, cited_by_count}. - REST: `GET https://agentcite-api.vercel.app/api/cite?topic=&n=&since=` → JSON {works:[…], markdown:"…"}. ## Endpoints - Citations: https://agentcite-api.vercel.app/api/cite - Health: https://agentcite-api.vercel.app/api/health - Docs: https://agentcite-api.vercel.app/docs.html ## Pricing - Free: 25 requests/day, no signup (rate-limited by IP). - Pro: 5,000 requests/day via API key. 7-day free trial, then $19/month, cancel anytime. ## Key facts - Every returned citation is a real openAlex record with a resolvable DOI. - Results are relevance-ranked to the query. - Best for: AI content tools, research agents, SEO/E-E-A-T workflows, anyone whose LLM keeps inventing sources.