n8n-nodes-opensearch

This is an n8n community node. It lets you use OpenSearch in your n8n workflows.

The OpenSearch project, created by Amazon, is a forked search project based on old versions of Elasticsearch and Kibana.

n8n is a fair-code licensed workflow automation platform.

Installation
Operations
Credentials
Compatibility
Sample Workflows
Version History
Resources

Installation

Follow the installation guide in the n8n community nodes documentation.

Operations

Document Actions

• Create a document
• Delete a document
• Get a document
• Get many documents
• Update a document

Index Actions

• Create an index
• Delete an index
• Get an index
• Get many indices

OpenSearch Vector Store

• Retrieve
• Insert
• Get Many

Credentials

You will need a baseURL and a username and password to authenticate to the OpenSearch service.

Compatibility

Package Version	n8n Version	Notes
@0.1.4	1.48.0+	Tested with 1.62.1
@0.2.6	1.120.0+ and 2.x	Installed and executed on 1.120.4, 1.123.7, 2.1.0 and 2.38.7 in CI
@0.2.0 to @0.2.5	1.121.0 to 2.28.x	Fails to load outside that range, see 0.2.6

Using as AI Tool

The OpenSearch node supports usableAsTool: true, which allows it to be used as an AI Agent tool. This creates an opensearchTool node type automatically.

Requirements:

• n8n 1.100.0 or later is required for AI tool support with community packages. Earlier versions of n8n 1.x (< 1.100.0) only support tool nodes from built-in n8n-nodes-base packages.

Query Parameter:
The Search Index operation's Query parameter accepts:

• Plain text: e.g., "my search term" - automatically converted to a query_string search across all fields
• JSON: e.g., {"query": {"match": {"title": "hello"}}} - passed directly to OpenSearch

When using as an AI tool, set up the Query field with $fromAI():

{{ $fromAI('Query', 'Search term to find documents', 'string') }}

Important: The $fromAI() must use 'string' type (not 'json'). If upgrading from an older version where you had 'json' type, you'll need to either:

1. Manually change 'json' to 'string' in the expression
2. Delete and re-add the tool node, then click "let the model define the parameters"

n8n 1.x vs 2.x: Both versions work with AI tools. n8n 1.x uses AgentV2 which validates tool inputs with Zod schemas directly. n8n 2.x uses AgentV3 with a different execution model. Using 'string' type ensures compatibility with both.

Sample Workflows

Sample n8n workflows demonstrating OpenSearch node usage are available in the tests/workflows/ folder:

• opensearch-all-modes-test-1.123.7.json - For n8n 1.x
• opensearch-all-modes-test-2.1.0.json - For n8n 2.x

Import these into your n8n instance to see examples of all operations including document CRUD, index management, and vector store usage.

Version History

0.2.6 (2026-09-14)

• Fixed Cannot find module '@langchain/classic/agents' when installing through the community nodes UI on n8n 1.120 and on n8n 2.29 and later
• Runtime imports limited to what n8n exposes to community packages, enforced by a test
• Fresh-install integration test against n8n 1.120.4, 1.123.7, 2.1.0 and 2.38.7 on every pull request
• Publishing to npm happens from GitHub Actions with provenance when the version changes on master

0.2.5 (2025-12-19)

• Fixed PostgreSQL/MySQL compatibility for VectorStoreOpenSearch node versioning
• Migrated to @n8n/node-cli for build tooling
• Added dark icon variants for theme support
• Improved UX: cleaner operation names, better descriptions, proper delete output format
• Moved codex metadata to separate .node.json files (scaffold pattern)

0.2.4 (2025-12-18)

• Fixed module resolution issue preventing installation via n8n community package installer
• Replaced @langchain/community OpenSearch vectorstore with custom implementation to avoid dependency conflicts

0.2.3 (2025-12-18)

• Moved @langchain/community and @langchain/core to peerDependencies to avoid version conflicts

0.2.2 (2025-12-18)

• Fixed OpenSearch node not appearing in n8n 2.x search (removed incorrect 'AI' category)

0.2.1 (2025-12-18)

• Extensive refactor with full test coverage
• Added support for OpenSearch 2.x and 3.x
• Added nmslib engine deprecation handling for OpenSearch 3.x
• Fixed build and packaging issues

0.2.0 (2025-12-17)

• Upgraded to @langchain/classic 1.0.5 for n8n 2.x compatibility
• Added n8n 2.x support while maintaining n8n 1.x compatibility

0.1.3 (2025-10-02)

• Added Search Index operation with Scroll API support
• Fixed HTTP methods for complex queries

0.1.2 (2025-07-10)

• Fixed missing dependency issue

0.1.1 (2024-10-04)

• Documentation updates

0.1.0 (2024-10-04)

• Initial release with OpenSearch document and index operations
• OpenSearch Vector Store for AI/LangChain workflows

Resources

• n8n community nodes documentation
• OpenSearch Langchain documentation