Claude.ai

Add persistent memory to 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).

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="/images/provider-icons/anthropic.svg" href="/integrations/claude-code"> Add Mem0 memory to Claude Code workflows </Card> </CardGroup> <Snippet file="star-on-github.mdx" />