Atlas MCP

AI-powered MCP server for searching and conversing over FHIR R4 clinical documents. Features hybrid retrieval (BM25 + pgvector), cross-encoder reranking, LangGraph multi-agent workflow, PII masking, and multi-provider LLM support (Ollama, OpenAI, Anthropic, Bedrock). 15+ tools for agent queries, document retrieval, session management, and embeddings ingestion.