AI Plugin Index
Callscript
Verified · npm:callscriptMCP server by vercel-labs · updated · ★ 119 · 7.3k downloads a week
a tool-calling script language for LLMs - the model authors ONE small script (plain JS, compiled to a validated, bounded, inert JSON plan - never executed) instead of calling tools one at a time. Adapter-based: mount AI SDK tools or plain { name, execute Callscript is published by npm:callscript from its verified domain in the official MCP Registry.
Last commit 11 days ago
Apache-2.0: permissive, fine for commercial use
Clear description, published package or server URL, 119 stars, original repository
Not checked yet. What we check
Install Callscript
Built from the published package, never by AIclaude mcp add callscript -- npx -y callscriptRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"callscript": {
"command": "npx",
"args": [
"-y",
"callscript"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"callscript": {
"command": "npx",
"args": [
"-y",
"callscript"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"callscript": {
"command": "npx",
"args": [
"-y",
"callscript"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add callscript -- npx -y callscript{
"mcpServers": {
"callscript": {
"command": "npx",
"args": [
"-y",
"callscript"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add callscript npx -y callscriptGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the callscript block.
Callscript: common questions
How do I install Callscript?
In Claude Code run claude mcp add callscript -- npx -y callscript. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Callscript the official server?
Callscript is published by npm:callscript from its verified domain in the official MCP Registry.
Is Callscript free?
The code is published under the Apache-2.0 licence. The service it connects to may have its own pricing.
Is Callscript safe to use?
It scores 88 of 100. Grades: maintenance A, licence A, quality B. The security check has not run for it yet. Review the code before you install. How grades work.
Does Callscript work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.