retainr

n8n community node for retainr.dev — AI agent memory persistence API. Store, search, and retrieve semantic memories for AI agents across workflow runs.

Package Information

Released: 7 mo ago
Downloads: 19 weekly / 169 monthly
Latest Version: 0.4.1
Author: stackflo-labs

Available Nodes

Retainr icon
Retainr
Store, search, and retrieve AI agent memories.

Documentation

@stackflo-labs/n8n-nodes-retainr

n8n community node for retainr.dev — the AI agent memory persistence API.

Give your n8n AI agents long-term memory that persists across workflow runs. Store facts, preferences, and context, then retrieve them with semantic search — so your agents remember what matters.

Features

Operation Description
Store Save a memory with namespace, tags, metadata, TTL, and deduplication
Search Semantic similarity search across stored memories
Get Context Retrieve pre-formatted memory context ready for LLM system prompts
List Browse memories with filters (namespace, tags)
Delete Remove memories by namespace
Get Workspace Info View plan usage, API keys, and workspace details

Installation

n8n Cloud & Desktop

  1. Go to Settings > Community Nodes
  2. Click Install
  3. Enter the exact package name: @stackflo-labs/n8n-nodes-retainr
  4. Click Install and restart if prompted

Self-hosted n8n (UI)

  1. Go to Settings > Community Nodes > Install
  2. Enter @stackflo-labs/n8n-nodes-retainr
  3. Click Install

Requires N8N_COMMUNITY_PACKAGES_ENABLED=true in your environment (set by default in Docker).

Self-hosted n8n (manual / Docker volume)

# If you mount a custom node directory or manage packages directly:
cd /home/node/.n8n
npm install @stackflo-labs/n8n-nodes-retainr

Then restart n8n.

Setup

  1. Sign up at retainr.dev and get your API key
  2. In n8n, go to Credentials > New > Retainr API
  3. Paste your API key (rec_live_...) — each key is scoped to one workspace
  4. The default Base URL (https://api.retainr.dev) works out of the box

How it works

Workspace → Namespace hierarchy:

  • Workspace: Your organization, determined by the API key
  • Namespace: Groups memories by customer, tenant, or any identifier (e.g., customer:alice, project:onboarding)

Every memory operation accepts a Namespace field. Use it to keep each customer's memories separate within your workspace.

Usage Examples

Store a memory after a conversation

  1. Add the Retainr node after your AI Agent
  2. Set Resource to Memory, Operation to Store
  3. Map the conversation summary to the Content field
  4. Set Namespace to the customer identifier (e.g., customer:alice)

Inject memory context into an LLM prompt

  1. Add a Retainr node before your AI Agent
  2. Set Operation to Get Context
  3. Use the incoming message as the Query
  4. Set the same Namespace to retrieve that customer's memories
  5. Pass the context output into your LLM's system prompt

Deduplicate similar memories

Use the Dedup Threshold field (e.g., 0.95) when storing. If a sufficiently similar memory already exists, it will be updated instead of duplicated.

AI Agent Tool

This node has usableAsTool enabled — you can use it directly as a tool inside n8n's AI Agent node, letting the agent decide when to store or recall memories autonomously.

API Documentation

Full API reference: retainr.dev/docs

License

MIT

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