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Run Python, Java, C, C++, C#, Go, Rust and 39 more languages, each run in a fresh, offline sandbox.
OnlineCompiler.io is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 100/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding OnlineCompiler.io to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add io.onlinecompiler/compiler https://api.onlinecompiler.io/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-24T14:00:29.377389Z",
"publishedAt": "2026-10-24T14:00:29.377389Z",
"statusChangedAt": "2026-10-24T14:00:29.377389Z"
}
},
"server": {
"name": "io.onlinecompiler/compiler",
"icons": [
{
"src": "https://onlinecompiler.io/logo.png",
"sizes": [
"128x128"
],
"mimeType": "image/png"
}
],
"title": "OnlineCompiler.io",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://api.onlinecompiler.io/mcp",
"type": "streamable-http",
"headers": [
{
"name": "Authorization",
"value": "Bearer {api_key}",
"isSecret": true,
"variables": {
"api_key": {
"isSecret": true,
"description": "Your OnlineCompiler.io API key (free, 100,000 runs a month)"
}
},
"description": "Optional: your OnlineCompiler.io API key as a Bearer token. Leave it out to sign in with OAuth instead. Get a free key at https://api.onlinecompiler.io/compilers/api-keys/"
}
]
}
],
"version": "1.2.0",
"websiteUrl": "https://onlinecompiler.io/mcp-code-execution",
"description": "Run Python, Java, C, C++, C#, Go, Rust and 39 more languages, each run in a fresh, offline sandbox."
}
}