Connect Claude to Fine Structure

One approval links Claude to your Fine Structure account. A conversation can then build a complete app, publish it, connect a custom domain, and leave an agent running behind it.

MCP connector: in claude.ai open Settings, Connectors, Add custom connector and paste https://finestructure.ai/api/mcp, then approve. No API keys.
Claude Code plugin, open source under MIT at github.com/finestructure-ai/claude-plugin, adding deploy, status and domain commands.
Around 70 tools: app generation, file edits with saved-version rollback, entities and records, publishing, domains with automatic TLS, access policies, traffic analytics, and scheduled AI agents.
Free tier, no credit card. Access is revocable at any time from the MCP tokens panel.

Guides: deploy from Claude Code and connecting Claude with MCP.

Other platforms: connect Fine Structure to any AI.

Before you start

A Fine Structure account. The free tier is enough and no credit card is required.
A Claude account. Anthropic documents custom remote MCP connectors on free, Pro, Max, Team and Enterprise, with free accounts limited to one custom connector.
On Team and Enterprise, an organization Owner has to add the connector before members can connect to it.
For the Claude Code steps, the Claude Code CLI installed and signed in.

Step by step

On claude.ai, go to Customize > Connectors.
Click the plus button, then choose Add custom connector.
Paste https://finestructure.ai/api/mcp as the remote MCP server URL.
Leave Advanced settings empty. Fine Structure registers the client automatically, so there is no OAuth Client ID or Client Secret to fill in.
Click Add, then click Connect on the new connector and approve the Fine Structure sign in page.
Team and Enterprise only: an Owner first adds it at Organization settings > Connectors > Add, hovers Custom and picks Web, enters the same URL and clicks Add. Members then open Customize > Connectors and click Connect.
For Claude Code, run in a terminal: claude mcp add --transport http finestructure https://finestructure.ai/api/mcp
Inside Claude Code, run /mcp and complete the authentication prompt for the finestructure server.
Confirm it worked with claude mcp list, which should show finestructure as Connected rather than Needs authentication.
Optional, for the shortcut commands: run /plugin marketplace add finestructure-ai/claude-plugin then /plugin install finestructure@finestructure

Configuration

{
  "mcpServers": {
    "finestructure": {
      "type": "http",
      "url": "https://finestructure.ai/api/mcp"
    }
  }
}

What to watch out for

Fine Structure is listed in Anthropic's connector directory as a Community connector. It is listed, not verified or official, and we do not claim otherwise.
In Claude Code, a JSON entry with a url but no type is treated as a misconfiguration and skipped, so keep "type": "http" in the snippet above. The value "streamable-http" is accepted as an alias for "http".
claude mcp add writes to the local scope by default. Add --scope user for every project, or --scope project to commit it to .mcp.json for your team.
The Claude Code plugin at github.com/finestructure-ai/claude-plugin is MIT licensed and optional. It adds /deploy to ship the current project, /fs-status for app status, live links and recent runtime errors, and /fs-domain example.com to attach a domain with DNS verification and TLS.
If you prefer a fixed credential over OAuth, Claude's custom connector dialog also has a Request headers section, and you can paste a scoped token from the Studio MCP Server tab as an Authorization Bearer value.

Questions people ask

Do I need to fill in the OAuth Client ID and Client Secret under Advanced settings?

No. Those fields exist for servers that issue static credentials. Fine Structure supports dynamic client registration, so leaving them empty is correct and the sign in will still work.

Does the connector work in the Claude desktop app as well as the browser?

Yes. Anthropic documents custom remote MCP connectors on Claude, Cowork and Claude Desktop, and the connector you add once appears across them on the same account.

Do I need the plugin to deploy from Claude Code?

No. The MCP server already exposes publishing and domain tools, so you can just ask. The plugin only wraps common jobs in the /deploy, /fs-status and /fs-domain commands so you do not have to describe them each time.