Cross-LLM memory without copy-paste

Sync ChatGPT context with Claude

People look for a way to sync ChatGPT context with Claude. There is no built-in sync: ChatGPT Memory stays in ChatGPT, and Claude cannot see it.

Palim is a hosted MCP memory server both tools can connect to. You explicitly save the sessions or decisions worth keeping, then search and retrieve them from the other client with source and timestamp. Chats do not auto-sync.

Set up Palim

What you can move between ChatGPT and Claude

Architecture and product decisions with reasoning
Research notes from Perplexity or ChatGPT that Claude should continue
Debugging discoveries and rejected approaches
Preferences and standing rules you want both tools to respect

ChatGPT ↔ Claude in four steps

1
Connect ChatGPT
Create app needs a paid ChatGPT plan (Plus/Team or the current paid tier). On the free tier, Create app returns 404 — you cannot finish connecting. Paid: Settings → Apps → Advanced Settings → enable Developer Mode → Create app. URL: https://api.usepalim.com/mcp. Authentication: OAuth with OIDC disabled. In every chat, add Palim with @Palim.
2
Save useful context from ChatGPT
After a useful answer, ask Palim to save the session or one durable decision. Use terms you will search for later.
```
@Palim Save this decision to Palim with the alternatives we rejected and why.
```
3
Connect Claude
In Claude, add a custom connector / remote MCP server with URL https://api.usepalim.com/mcp and finish OAuth. No API key is required for that flow.
4
Retrieve in Claude before you continue
Ask Claude to search Palim for the decision or topic before it drafts or plans further work.
```
Search Palim for the authentication architecture decision from ChatGPT and summarize what we chose.
```

What “sync ChatGPT with Claude” actually means

The search is usually the same job: keep a decision, research thread, or preference available when you switch from ChatGPT to Claude — or back.

Palim does that as save-and-retrieve over one hosted MCP endpoint, not a silent two-way copy of every chat. You stay in control of what moves.

Why ChatGPT Memory is not enough

ChatGPT Memory stays inside ChatGPT. It cannot hand a decision to Claude Desktop, Claude Code, or Cursor. Palim is the shared layer when you use more than one AI product.

You stay in control: nothing is imported unless a Palim save tool is called explicitly (or your client is configured to do so).

Honest setup notes

ChatGPT custom apps / Create app need a paid ChatGPT plan (Plus/Team or the current paid tier). On the free tier, Create app returns 404 — you cannot finish connecting. OIDC must stay disabled or the OAuth flow fails. Claude Connectors use OAuth against the same MCP URL.

Search today uses full-text and text matching, not semantic embeddings — concrete keywords and tags work best.

One hosted MCP endpoint for every client
EU database region in Frankfurt
AES-256-GCM for supported stored content fields
Works with Cursor and Claude Code on the same account

Frequently asked questions

How do I sync ChatGPT context with Claude?

Connect both to Palim via MCP, save the useful context from ChatGPT, then search Palim from Claude. Palim does not silently sync every chat — only what you or your client explicitly save.

How do I share context between ChatGPT and Claude?

Same path: connect both via MCP, save in one client, retrieve in the other. Share and sync are the same job here — explicit, searchable memory, not a live chat mirror.

Does ChatGPT Memory sync to Claude?

No. ChatGPT Memory is locked to ChatGPT. Palim is a separate, cross-tool memory you control.

Do I need an API key?

Claude and Cursor typically use OAuth with the hosted MCP URL. ChatGPT uses OAuth for the custom app (OIDC off). API keys remain available on the setup page for clients that need them.

Can Perplexity join the same memory?

Yes, when connected to the same Palim account (Mac App currently uses an API key via mcp-remote). See the Perplexity integration docs.

Move one real decision across tools

Save something useful in ChatGPT, open Claude, and retrieve it before you continue.