# Mem0: Hermes Agent plugin

> Mem0 memory provider — server-side LLM fact extraction with semantic search, automatic deduplication and opt-in reranking, in platform, self-hosted or local OSS mode.

Canonical: https://hermeswatcher.com/plugins/mem0  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/mem0  
Last updated in catalog: 2026-10-06

Mem0 memory provider — server-side LLM fact extraction with semantic search, automatic deduplication and opt-in reranking, in platform, self-hosted or local OSS mode. Maintained by Mem0; the same provider that shipped in-tree.

## Good to know before installing

Conversation turns and recall queries go to the configured Mem0 backend (api.mem0.ai in platform mode); at this pin the mem0ai library's anonymous PostHog usage telemetry stays on unless MEM0_TELEMETRY=false is set; `hermes memory setup` can start Docker (pgvector) and Ollama containers for local mode.

From the plugin's catalog listing.

## How to install

1. Install it. Hermes asks for any API keys it needs, then asks whether to turn it on.

```bash
hermes plugins install mem0
```

2. Said no? Turn it on later:

```bash
hermes plugins enable mem0
```

3. Restart Hermes so it loads the plugin.

Some plugins also need a sign-in or settings: see the official page. Memory plugins ask whether to become your memory provider instead. Steps follow the official plugins guide: https://hermes-agent.nousresearch.com/docs/user-guide/features/plugins

## Facts

- Category: Memory & notes
- Maintained by: mem0ai (Community)
- Needs: No API keys declared
- Version: 1.3.0
- In the catalog since: 2026-10-06

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/mem0)
- [Source code](https://github.com/mem0ai/mem0/tree/main/integrations/hermes-plugin-mem0#readme)
- [All plugins](https://hermeswatcher.com/plugins.md)

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