A simple MCP (Model Context Protocol) server for Elasticsearch designed for cloud environments where your public key is already authorized on the
Custom Elasticsearch MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. A simple MCP (Model Context Protocol) server for Elasticsearch designed for cloud environments where your public key is already authorized on the server.
You will need one environment variable: ES_API_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Installation goes through your MCP client rather than a global install: point it at alpine/curl on a container image and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. It is maintained by M0-AR; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Custom Elasticsearch's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
{
"mcpServers": {
"elasticsearch-custom": {
"command": "docker",
"args": [
"run", "-i", "--rm",
"--add-host=host.docker.internal:host-gateway",
"-e", "ES_URL=http://host.docker.internal:9400",
"-e", "MAX_CONNECTIONS=200",
"-e", "MAX_KEEPALIVE_CONNECTIONS=50",
"-e", "CONNECTION_TIMEOUT=60",
"-e", "REQUEST_TIMEOUT=60",
"elasticsearch-mcp:latest"
]
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| ES_API_KEY | Credential the server authenticates with. | Yes |
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