Persistent, interactive MCP Apps — the AI builds an app once, you both reuse it
Connect Runs on your machine
claude mcp add open-mcp-apps -e OMA_DB=<OMA_DB> -e OMA_VIEWER=<OMA_VIEWER> -e OMA_DYNAMIC_TOOLS=<OMA_DYNAMIC_TOOLS> -- npx -y @2nd1st/[email protected]{
"mcpServers": {
"open-mcp-apps": {
"command": "npx",
"args": [
"-y",
"@2nd1st/[email protected]"
],
"env": {
"OMA_DB": "<OMA_DB>",
"OMA_VIEWER": "<OMA_VIEWER>",
"OMA_DYNAMIC_TOOLS": "<OMA_DYNAMIC_TOOLS>"
}
}
}
}{
"mcpServers": {
"open-mcp-apps": {
"command": "npx",
"args": [
"-y",
"@2nd1st/[email protected]"
],
"env": {
"OMA_DB": "<OMA_DB>",
"OMA_VIEWER": "<OMA_VIEWER>",
"OMA_DYNAMIC_TOOLS": "<OMA_DYNAMIC_TOOLS>"
}
}
}
}{
"servers": {
"open-mcp-apps": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@2nd1st/[email protected]"
],
"env": {
"OMA_DB": "<OMA_DB>",
"OMA_VIEWER": "<OMA_VIEWER>",
"OMA_DYNAMIC_TOOLS": "<OMA_DYNAMIC_TOOLS>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
OMA_DBOptional | Path to the SQLite store. Defaults to a fixed per-user data directory; set this to isolate a store. |
OMA_VIEWEROptional | Browser viewer on loopback. On by default; set to 0 to turn it off. |
OMA_DYNAMIC_TOOLSOptional | Set to 1 to also expose one open_<name> tool per saved app. Off by default, because it costs prompt cache. |
Details
| Package | @2nd1st/[email protected] (NPM, stdio) |
| First published | 16 Aug 2026 |
| Last updated | 16 Aug 2026 |
| Registry name | io.github.2nd1st/open-mcp-apps |
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