KosmoKrator

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Elastic MCP Integration for LangGraph

Connect Elastic to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 5 read 2 write Username and password auth
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Connect Elastic to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

Elastic MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "mcpServers": {
    "kosmokrator-elastic": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=elastic",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=elastic --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Elastic instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Elastic Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the Elastic integration catalog.

MCP toolSource functionTypeDescription
integration__elastic__elastic_list_indices elastic.elastic_list_indices Read List all indices in the Elasticsearch cluster. Returns index names, health status, document counts, and sizes.
integration__elastic__elastic_get_index elastic.elastic_get_index Read Get detailed information about a specific Elasticsearch index, including mappings, settings, and aliases.
integration__elastic__elastic_create_index elastic.elastic_create_index Write Create a new Elasticsearch index with optional settings and mappings.
integration__elastic__elastic_search_documents elastic.elastic_search_documents Read Search for documents in an Elasticsearch index. Supports full query DSL including match, term, bool, and aggregation queries.
integration__elastic__elastic_index_document elastic.elastic_index_document Write Create or update a document in an Elasticsearch index. Provide an ID to update an existing document, or omit it to let Elasticsearch auto-generate one.
integration__elastic__elastic_get_document elastic.elastic_get_document Read Retrieve a single document from an Elasticsearch index by its ID.
integration__elastic__elastic_cluster_health elastic.elastic_cluster_health Read Get the health status of the Elasticsearch cluster, including status (green/yellow/red), number of nodes, and shard information.

Related Elastic Pages

Elastic CLIUse direct JSON commands instead of MCP discovery. Elastic MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.