OnlineCompiler.io MCP Server
io.onlinecompiler/compilerv1.0.3
Run Python, Java, C, C++, C#, Go, Rust and 38 more languages, each run in a fresh, offline sandbox.
context tax
pending
security
pending
cold start
hosted
freshness
Active1d ago
Our reading of OnlineCompiler.io, from the data
OnlineCompiler.io is a code execution & sandboxes MCP server, listed in the official MCP Registry.
We haven't measured its tool list yet, so its token cost is unknown.
Maintenance is active: the last public signal was in the last day (2026-10-18). For comparison, 68% of code execution & sandboxes servers are active or maintained.
It runs as a hosted endpoint, so there is nothing to install.
Install OnlineCompiler.io MCP server
Install in Claude Code
claude mcp add --transport http io-onlinecompiler-compiler https://api.onlinecompiler.io/mcpInstall in Cursor
{
"mcpServers": {
"io-onlinecompiler-compiler": {
"url": "https://api.onlinecompiler.io/mcp"
}
}
}Install in Claude Desktop
{
"mcpServers": {
"io-onlinecompiler-compiler": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://api.onlinecompiler.io/mcp"
]
}
}
}Or add it as a custom connector under Settings → Connectors. The config above bridges via mcp-remote.
Install in VS Code
{
"servers": {
"io-onlinecompiler-compiler": {
"type": "http",
"url": "https://api.onlinecompiler.io/mcp"
}
}
}Install in Windsurf
{
"mcpServers": {
"io-onlinecompiler-compiler": {
"serverUrl": "https://api.onlinecompiler.io/mcp"
}
}
}Remote endpoints
- streamable-http
https://api.onlinecompiler.io/mcp
Freshness
Active — last maintenance signal 1d ago. The newest of the signals below sets the band.
Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-18 · 1d ago · official registry · v1.0.3
How it compares in Code Execution & Sandboxes
Against the most-starred code execution & sandboxes servers we index. Token cost is per model turn, measured from each server's live tool list.
| Server | Stars | Tools | Tokens / turn | Freshness | Runs |
|---|---|---|---|---|---|
| OnlineCompiler.io (this) | — | — | not measured | Active | hosted |
| REA | 324,759 | — | not measured | Active | local |
| Node Repl | 28,567 | — | not measured | Active | local |
| Ask Jev | 5,224 | — | not measured | Active | hosted |
| Container Use | 4,072 | — | not measured | Maintained | — |
| MATLAB | 1,679 | — | not measured | Active | local |
FAQ
›How do I install the OnlineCompiler.io MCP server in Claude Code?
Run: claude mcp add --transport http io-onlinecompiler-compiler https://api.onlinecompiler.io/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does OnlineCompiler.io require an API key?
No required environment variables are declared in its published metadata.
›Can I use OnlineCompiler.io as a remote (hosted) MCP server?
Yes. It is a hosted MCP server; connect to its URL with any client that supports remote MCP.
›Is OnlineCompiler.io in the official MCP registry?
Yes, as io.onlinecompiler/compiler.
Sources and method
- Official MCP Registry entry
- updated 2026-10-18
- Last checked against all sources
- 2026-10-19
The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.
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