Code Runner
The Code Runner MCP server provides AI assistants with the ability to execute Python and JavaScript/TypeScript code snippets in isolated environments. Built with Deno and utilizing Pyodide for Python execution, it exposes two main tools: python-code-runner and javascript-code-runner, both of which accept code as input and return the combined stdout/stderr output. The JavaScript runner supports npm packages, Deno modules from JSR, and Node.js built-in modules, while the Python runner can import pure Python packages with wheels and packages from PyPI or JsDelivr CDN. This implementation is particularly valuable for developers who need to test code snippets, prototype solutions, or demonstrate programming concepts directly within AI assistant conversations.
Composite of vulnerability cleanliness, spec conformance, provenance, stability, and usage signals — scanned and weighted by Cognium. Human and agent signals are tracked separately.
View full trust & usage report →Metadata
- Version
- 1.0.0
- Skill type
- atomic
- Execution layer
- mcp-remote
- Category
- other
- Source
- PulseMCP
- Author type
- human
- Updated
- 2026-04-25
Use via MCP
Resolve Code Runner from your agent
Streamable HTTP transport at https://api.skillsregistry.net/mcp. No auth for read tools. Discovery: .well-known/mcp.json.
One command in your shell — Claude Code wires it up and verifies the connection. Run /mcp in any session to confirm.
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp--scope user for --scope project to commit it to .mcp.json.