> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mem0.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude.ai

> Add persistent memory to Claude.ai with the Mem0 remote MCP server: custom connector setup and native-memory troubleshooting.

Add persistent memory to [**Claude.ai**](https://claude.ai) (the hosted web app, not Claude Code) using Mem0's remote MCP server. Claude.ai connects to MCP servers over the internet as **custom connectors**; there is no local plugin or hook system here, since chats run in Anthropic's cloud, not on your machine.

## Prerequisites

1. A Mem0 Platform account: <a href="https://app.mem0.ai?utm_source=oss&utm_medium=integration-claude-ai" rel="nofollow">sign up at app.mem0.ai</a>
2. A Claude.ai account on any plan (free, Pro, Max, Team, or Enterprise)

You don't need an API key up front: the connector uses browser-based sign-in the first time Claude calls a Mem0 tool (see [Signing in](#signing-in)).

## Installation

### Individual accounts (Pro, Max, or free)

1. Go to **Customize > Connectors**
2. Click **+**, then **Add custom connector**
3. Enter the server URL: `https://mcp.mem0.ai/mcp/`
4. Click **Add**

<Note>
  Free-tier accounts are limited to one custom connector. Pro, Max, Team, and Enterprise accounts can add multiple.
</Note>

### Team and Enterprise organizations

An organization owner registers the connector once for everyone:

1. Go to **Organization Settings > Connectors**
2. Click **Add**, hover **Custom**, then select **Web**
3. Enter the server URL: `https://mcp.mem0.ai/mcp/`
4. Click **Add**

Members then connect individually: **Customize > Connectors**, find **mem0**, and click **Connect**.

### Enabling in a chat

Connectors are opt-in per conversation. Click the **+** button next to the chat prompt, open **Connectors**, and toggle **mem0** on before you start.

## Signing in

The first time Claude calls a Mem0 tool, your browser opens a sign-in prompt to authorize the connector against your Mem0 account. Approve it once; Claude.ai stores and refreshes the resulting token for you. There's no API key to paste into the connector UI itself.

## What's Included

| Component                   |                   Included                   |
| --------------------------- | :------------------------------------------: |
| MCP Server (9 memory tools) |                      Yes                     |
| Lifecycle Hooks             |    No (Claude.ai has no local hook system)   |
| Mem0 SDK Skill              | No (Claude.ai has no local skills directory) |

## Available MCP Tools

| Tool                  | Description                                         |
| --------------------- | --------------------------------------------------- |
| `add_memory`          | Save text or conversation history for a user/agent  |
| `search_memories`     | Semantic search across memories with filters        |
| `get_memories`        | List memories with filters and pagination           |
| `get_memory`          | Retrieve a specific memory by ID                    |
| `update_memory`       | Overwrite a memory's text by ID                     |
| `delete_memory`       | Delete a single memory by ID                        |
| `delete_all_memories` | Bulk delete all memories in scope                   |
| `delete_entities`     | Delete a user/agent/app/run entity and its memories |
| `list_entities`       | List users/agents/apps/runs stored in Mem0          |

## Troubleshooting

* **Claude never calls the mem0 tools, even though the connector shows as connected**: Claude.ai ships its own native memory (Settings > Capabilities > Memory, on by default), which synthesizes a running summary from your chat history automatically. When both are active, Claude's system prompt tends to favor its built-in memory and rarely reaches for a third-party memory tool on its own. Ask explicitly ("search my mem0 memories for...", "save this to mem0") to force the tool call, or pause Claude's native memory (Settings > Capabilities > Memory > Pause) if you want Mem0 to be the primary memory store for that account.
* **"Connection failed" or the connector won't add**: Confirm the URL is exactly `https://mcp.mem0.ai/mcp/`. Custom connectors reach your MCP server from Anthropic's cloud, not your device, so a localhost URL will never work here.
* **No tools appearing after adding the connector**: Make sure you toggled **mem0** on for the current conversation under the **+ > Connectors** menu; adding a connector doesn't enable it in every chat automatically.
* **Can't add a second connector**: Free-tier accounts are capped at one custom connector; upgrade to Pro/Max/Team/Enterprise for more.

<CardGroup cols={2}>
  <Card title="Mem0 MCP Setup" icon="puzzle-piece" href="/platform/mem0-mcp">
    Detailed MCP configuration for all clients
  </Card>

  <Card title="Claude Code Integration" icon="https://mintcdn.com/mem0/QK-8_hblyHgAr7vt/images/provider-icons/anthropic.svg?fit=max&auto=format&n=QK-8_hblyHgAr7vt&q=85&s=d2a2af9f60f53e9f21d741fe237af0f5" href="/integrations/claude-code" width="16" height="16" data-path="images/provider-icons/anthropic.svg">
    Add Mem0 memory to Claude Code workflows
  </Card>
</CardGroup>

<Snippet file="star-on-github.mdx" />