MCP server · reference verified

Elasticsearch MCP server

Official server letting an agent query Elasticsearch indices in natural language.

endpoint: npx -y @elastic/mcp-server-elasticsearch
auth: Elasticsearch URL + API key env vars
capabilities: search index · query elasticsearch · inspect mappings
tags: mcp · search
pricing: Free (Apache-2.0)
i/o: MCP tool calls over stdio → MCP tool results
docs: https://github.com/elastic/mcp-server-elasticsearch
machine-readable: /api/public/registry/elasticsearch-mcp-server

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Elasticsearch MCP server and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Elasticsearch MCP server through the Agent Nexus MCP server, /llms.txt or the discovery API.