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MCP Comparison · 2026

Elasticsearch vs PostgreSQL (archived) MCP Server

Comparing Elasticsearch and PostgreSQL (archived) as MCP servers? Elasticsearch (search elasticsearch) is best when query dsl drafting. PostgreSQL (archived) (query postgres) is best when auditing or replacing an existing install. Both run as Model Context Protocol servers and can coexist in the same client. Updated 2026.

Elasticsearch

Elasticsearch

Search indices, inspect mappings, and run queries against Elasticsearch from an AI agent.

PostgreSQL (archived)

PostgreSQL (archived)

Anthropic's reference Postgres MCP — archived July 2025 and superseded by Postgres MCP Pro or the Supabase MCP.

Side-by-side specs

Pulled from each MCP's verified fact sheet.

 ElasticsearchPostgreSQL (archived)
Primary functionSearch ElasticsearchQuery Postgres
MaintainerElasticAnthropic (archived 2025-07-10)
PricingFreemiumOpen source
Setup complexityMedium · ~10 minLow · ~3 min
Transportstdiostdio
Auth modelAPI keyAPI key
LicenseApache-2.0MIT
LanguageTypeScriptTypeScript
Latest versionlatestarchived
Compatible clientsClaude, Cursor, VS Code, Windsurf, Any MCP-compatible client, Elasticsearch 8+, Elastic CloudClaude, Cursor, Any MCP-compatible client, PostgreSQL 12+
Last verified2026-06-022026-05-29

Which one should you pick?

Decision rubric drawn from each MCP's documented strengths.

Choose Elasticsearch

  • Query DSL drafting
  • Mapping inspection
  • Log search and debugging
See full Elasticsearch write-up →

Choose PostgreSQL (archived)

  • Auditing or replacing an existing install
  • Reference reading for how the early MCP servers were structured
See full PostgreSQL (archived) write-up →

Pick something else if…

  • Index writes from an LLM
  • New installs (the repo is archived)

Feature breakdown

Key capabilities each server ships out of the box.

Elasticsearch

  • Official Elastic maintainership
  • Index, alias, and mapping introspection
  • Query DSL and ES|QL execution
  • Read-only by default
  • API-key auth (no superuser tokens)

PostgreSQL (archived)

  • Archived on 2025-07-10 — no upstream maintenance
  • Read-only contract is bypassable per Datadog Security Labs
  • SELECT-only tool surface (when the contract holds)
  • Stdio transport; one connection per process
  • Recommended migration: Postgres MCP Pro or Supabase MCP

Install snippets

Open the detail page for ready-to-paste config for every major client.

Install Elasticsearch

Setup snippets for Claude, Cursor, VS Code, Windsurf →

docker run --rm -i -e ES_URL -e ES_API_KEY docker.elastic.co/mcp/server-elasticsearch:latest

Install PostgreSQL (archived)

Setup snippets for Claude, Cursor, VS Code, Windsurf →

npx -y @modelcontextprotocol/server-postgres postgresql://user:pass@localhost/db

FAQ

Elasticsearch vs PostgreSQL (archived): which MCP server should I use?

Pick Elasticsearch when query dsl drafting. Pick PostgreSQL (archived) when auditing or replacing an existing install. Elasticsearch is built for search elasticsearch, while PostgreSQL (archived) focuses on query postgres.

Can I run both Elasticsearch and PostgreSQL (archived) together?

Yes. MCP clients run each server as a separate process and surface every server's tools simultaneously, so you can install both and let your agent decide which to call. Be deliberate with auth scopes when stacking servers.

Which is easier to set up, Elasticsearch or PostgreSQL (archived)?

PostgreSQL (archived) has the lighter setup. Elasticsearch reports medium complexity (~10 min); PostgreSQL (archived) reports low complexity (~3 min).

More Elasticsearch comparisons

ElasticsearchvsPostgres MCP ProElasticsearchvsClickHouseElasticsearchvsMongoDB

Browse all Databases MCPs? See the full ranked list →