Lock an MCP server to a package

A connected MCP server is a live connector. Every discovered tool becomes kody.mcp["server-name"].tool_name(...) for execute and every package. That is often wider than the job. Lock the server to a package so only that published surface can call it.

This is the MCP counterpart to Gmail drafts without send. OAuth tokens stay as wide as the provider issued them; a publish lock holds a package tree. An MCP server lock holds who may call the connector. Integration connections use the same tighten-only grant via resourceLock({ kind: 'integration', name, package_id }).

What the lock does

Usage on the saved server (usage_mode on mcp_server_settings):

• Any context (default) — execute and every package can call kody.mcp["name"].
• Specific packages — only the listed saved package ids can call it. Ad hoc execute is denied. Other packages are denied.

Tokens stay in the per-user MCP client hub. Disable still hides tools for everyone; lock leaves the connection up and narrows who may use it.

resourceLock({ kind: 'mcp_server', server, package_id }) switches the server to packages mode and adds that package id. Additional grants accumulate. Unlocking or removing a grant is website-only at /@<slug>/-/mcp-servers/:serverId.

The loop

1. Connect the server. Follow Connect remote MCP servers (mcpServerAdd, authorize if needed). Confirm tools with mcpServerList.
2. Name the grant. "This package may call these tools. Execute may not." Write that in README ## Intent and in the export JSDoc Purpose.
3. Save a thin wrapper package. Follow package_authoring. Give it its own package name leaf. The export calls kody.mcp["server-name"] for the allowed tools only. Do not re-export the whole server.
4. Publish, then lock. After the first successful publish, call resourceLock({ kind: 'mcp_server', server, package_id }) with the server id or name and the saved package_id (or set Usage on /@<slug>/-/mcp-servers/:serverId). Say so in chat so the owner knows unlock is a website click.
5. Smoke-test from the package, not execute. Invoke the named export. A later execute that calls kody.mcp["server-name"] should fail with the account URL.

Later grants

resourceLock({ kind: 'mcp_server', server, package_id }) with another package_id adds that package. It does not unlock. The owner removes a grant or returns the server to any context on the account page.

If a package needs the lock off, send the owner to /@<slug>/-/mcp-servers/:serverId. Do not invent an unlock capability.

When to load this guide

Load locked_mcp_server when someone wants a connected MCP server that execute must not call, when a home or third-party MCP is coarser than the intended package, or when they ask how MCP usage compares to publish lock or resourceLock({ kind: 'integration', name, package_id }). For connecting the server, load the usage page and local_mcp_tunnels for home LAN servers. For holding a published tree still, load locked_gmail_drafts and Packages → Publish lock (raw).