Which AI apps can use Lodestone
Lodestone works in any AI app that can add a custom connector, also called a remote MCP server. Here is each app, which plans can add it, whether it can take actions as well as search, and whether it works on your phone.
Free. No card, no password. We email you a link that sets up your account.
Chat apps
Search means looking things up and reading them. Actions means sending, posting or changing something, such as an email, a post or an ad.
| App and plan | Who can add it | Search | Actions | On your phone |
|---|---|---|---|---|
| Claude Free | You, as one custom connector | Yes | Yes, Claude asks first | Yes. Add it on the web, desktop or Android app; it syncs to your phone |
| Claude Pro, Max, Team, Enterprise | You. On Team and Enterprise an owner may need to allow custom connectors | Yes | Yes, Claude asks first | Yes, same as Free |
| ChatGPT Free, Plus, Pro | You, under Plugins, Add custom MCP server | Yes | Yes, ChatGPT asks first (see note) | Add it on chatgpt.com in a browser; OpenAI says custom servers are web only |
| ChatGPT Business | Only a workspace admin or owner, for the whole workspace | Yes | Yes | Web only, per OpenAI |
| ChatGPT Enterprise, Edu | Admins, or members an admin allows | Yes | Yes, the admin picks which actions | Web only, per OpenAI |
| Gemini (personal) | You, under Customize, Connectors, Custom | Yes | Not checked yet | Not checked yet |
| Meta Muse (US and Canada) | You: ask it in a chat to build a custom connector | Yes | Not checked yet | Not checked yet |
What we saw on a ChatGPT Free account (20 October 2026): Lodestone added from Plugins with no Developer Mode, and its permission screen reads "Read without asking, but ask before making changes". OpenAI's help page lists full support, actions included, for Business, Enterprise and Edu, and read-only access for Pro. If your account has no Add custom MCP server button, your plan or your workspace admin does not allow it yet.
From Anthropic's help page: custom connectors work on every Claude plan, and Free accounts can add one. Checked by us on the web, the desktop app and the Android app; not yet on iPhone.
Checked 14 November 2026. Sources: OpenAI help, Anthropic help.
Coding tools
| Tool | Where it runs | How to add it |
|---|---|---|
| Claude Code | Terminal, Claude Code desktop | claude mcp add --transport http --scope user lodestone <your link> |
| Codex | Terminal, Codex desktop app, VS Code | Add [mcp_servers.lodestone] with your link to ~/.codex/config.toml |
| Gemini CLI | Terminal, no subscription needed | gemini mcp add --transport http --scope user lodestone <your link> |
| Cursor | Desktop editor | Settings › Tools and Integrations › Add Custom MCP |
| VS Code | Desktop editor, built in | Command Palette › MCP: Add Server › HTTP |
| Windsurf | Desktop editor | Add it to ~/.codeium/windsurf/mcp_config.json |
| Cline | VS Code extension | Cline › MCP Servers › Remote Servers |
| OpenCode | Terminal | Add it to opencode.json under mcp |
Coding tools run every Lodestone tool, searches and actions alike. Your setup page has the exact command or config with your link filled in.
Questions
Does Lodestone work with ChatGPT Free?
Yes. We added it on a ChatGPT Free account from Plugins, with no Developer Mode. Searches run straight away, and ChatGPT asks before anything that sends or changes something.
Does Lodestone work on the free Claude plan?
Yes. Free accounts can add one custom connector, and Lodestone is one link, so the free plan gets every Lodestone service.
Does it work on my phone?
In Claude, yes: add it once and it shows up in the Claude phone app. In ChatGPT, add it on chatgpt.com in a browser; we have not yet checked the ChatGPT phone app.
Why can't I find where to add a connector?
Your plan or your workspace admin may not allow custom connectors. On ChatGPT Business only an admin or owner can add one; on Claude Team and Enterprise an owner may need to allow them.
Which app should I use?
Claude is the most complete: every plan, every device we checked, searches and actions. ChatGPT works too, set up in a browser.
Related
Connect it free
No card and no password. Sign in with your email and add the link to Claude or ChatGPT.