Cito

What it does

Cito is a hybrid search engine over the Semantic Scholar corpus: 236M papers in the keyword index, 146M with SPECTER2 dense vectors, fused with RRF and reranked by a cross-encoder. Free web search with no signup, a plain JSON API, and a native MCP endpoint so agents like Claude Code can run deep literature research without upstream rate limits. Built because every academic API throttled my agents to death.

Search academic papers by meaning, not just keywords. Hybrid, semantic, and keyword retrieval over a self-hosted Semantic Scholar corpus (~148M papers) with SPECTER2 embeddings.

Semantic search over academic papers. Find work by meaning, not just keywords. Self-hosted academic search over roughly 148 million papers from the Semantic Scholar corpus, enriched with OpenAlex open-access links. Run hybrid, semantic (SPECTER2), or keyword retrieval without the public API's 1 request/secondfrom cito.fim.ai

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