Elasticsearch MCP Server is a Model Context Protocol (MCP) server that connects MCP clients to data stored in Elasticsearch. It enables natural language interactions with Elasticsearch indices through a defined set of MCP tools and is distributed as a Docker image (docker.elastic.co/mcp/elasticsearch). The server supports MCP stdio, streamable-HTTP, and, optionally, SSE transports. It requires an Elasticsearch cluster (via ES_URL) and credentials (API key or basic auth via ES_API_KEY or ES_USERNAME/ES_PASSWORD), with optional SSL verification skip (ES_SSL_SKIP_VERIFY). It exposes tools such as list_indices, get_mappings, search, esql, and get_shards to perform common Elasticsearch operations. The server supports Elasticsearch versions 8.x and 9.x and can be run in stdio mode for direct I/O or in HTTP mode for streamable HTTP with a health endpoint at /ping. Deployment guidance includes Claude Desktop integration via an mcp-proxy bridge. Important: This server is deprecated and superseded by Elastic Agent Builder’s MCP endpoint in Elastic 9.2.0+ and Elasticsearch Serverless projects."