Supported Languages

Rustbox supports 8 languages. All are available in both the Judge and Executor profiles.

Languages

Language	Aliases	Compiled	Runtime
Python	python, py	No	CPython
C	c	Yes	GCC
C++	cpp, c++, cxx, cc	Yes	GCC
Java	java	Yes	OpenJDK
JavaScript	javascript, js	No	Bun
TypeScript	typescript, ts	No	Bun
Go	go	Yes	Go compiler
Rust	rust, rs	Yes	rustc

Use any alias in the language field when submitting code.

Default limits by profile

Judge mode

Designed for competitive programming and coding assessments where submissions are short-lived and deterministic. Limits vary by language:

Language	Memory	CPU Time	Wall Time	Max PIDs	Max Open Files
Python	256 MB	4s	7s	10	32
C	256 MB	8s	10s	8	32
C++	256 MB	8s	10s	8	64
Java	512 MB	8s	10s	1024	128
JavaScript	512 MB	8s	12s	16	64
TypeScript	512 MB	8s	12s	16	128
Go	256 MB	8s	10s	1024	64
Rust	256 MB	8s	15s	64	64

All languages: code size 64 KB, stdin size 256 KB, network disabled.

Executor mode

Designed for AI agents, code playgrounds, and interactive tool execution where workloads are heavier and may need network access.

Resource	Limit
Memory	2 GB
Wall time	60 seconds
CPU time	60 seconds
Max PIDs	256
Code size	64 KB
Stdin size	256 KB
Network	Filtered

Compilation

For compiled languages (C, C++, Java, Go, Rust), compilation happens inside the sandbox with the same isolation guarantees as execution. Compilation time counts toward wall time limits.

Language detection

The GET /api/languages endpoint returns the list of languages available on the platform:

curl -s "https://api.rustbox.orkait.com/api/languages" \
  -H "X-API-Key: rb_live_your_key_here" | jq

["python", "c", "cpp", "java", "javascript", "typescript", "go", "rust"]