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OnlineCompiler.io

by io.onlinecompiler
OverviewDiscussionsAdmin

Server Details

Run Python, Java, C, C++, C#, Go, Rust and 39 more languages, each run in a fresh, offline sandbox.

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Status
Unhealthy
Uptime
39.8% over 23 days
Last Tested
Transport
Streamable HTTP
URL
Repository
onlinecompiler-io/onlinecompiler-mcp
GitHub Stars
0
Server Listing
OnlineCompiler MCP Server
ChatGPT
–
Claude
–

TDQS

A4.4/5.0

Scored across 3 tools

Disambiguation5/5

list_compilers, run_code, and run_tests target clearly distinct actions: discovery, single execution, and judge-style testing. The descriptions explicitly direct agents to run_tests for expected-output checks, eliminating any overlap in purpose.

Naming Consistency5/5

All tool names follow a consistent snake_case verb_noun pattern (list_compilers, run_code, run_tests) with no deviations or mixed conventions.

Tool Count4/5

Three tools cover the core workflow but sit at the lower bound of typical scoping. A minor addition like a compiler details or checker discovery tool could make the set feel less lean.

Completeness4/5

Core execution and testing are fully covered, but minor gaps exist: no tool to fetch individual compiler metadata, list available checkers, or retrieve test artifacts beyond run_tests' visible-test metadata.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 2 tool updates
    • Changedrun_code2 fields changed
      • addedInput schema / properties / files
        Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "additionalProperties": true,
+        "type": "object"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Input files, up to 8 and 1,000,000 decoded bytes in total, each {'name': 'data.csv', 'content': text, 'encoding': 'utf8' (default) or 'base64'}. They sit in the program's working directory, so pd.read_csv('data.csv') works."
+}
      • changedOutput schema / (root)
        Previous value: -{
-  "additionalProperties": true,
-  "type": "object"
-}New value: +null
    • Changedrun_tests3 fields changed
      • changedInput schema / properties / checker / description
        Previous value: -"How output is compared: trim ignores trailing whitespace (default), exact is byte for byte, tokens ignores all whitespace differences, float compares numbers within a small tolerance."New value: +"How output is compared: trim ignores trailing whitespace (default), exact is byte for byte, tokens ignores all whitespace differences, float compares numbers within a small tolerance, rows compares lines as an unordered set (for SQL and pandas output), numbers within tolerance."
      • changedInput schema / properties / checker / enum
        Previous value: -[
-  "trim",
-  "exact",
-  "tokens",
-  "float"
-]New value: +[
+  "trim",
+  "exact",
+  "tokens",
+  "float",
+  "rows"
+]
      • addedInput schema / properties / files
        Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "additionalProperties": true,
+        "type": "object"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Input files, up to 8 and 1,000,000 decoded bytes in total, each {'name': 'data.csv', 'content': text, 'encoding': 'utf8' (default) or 'base64'}. They sit in the program's working directory, so pd.read_csv('data.csv') works. Shared by every test."
+}
  2. 2 tool updates
    • Changedrun_code1 field changed
      • addedInput schema / properties / time_limit
        Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Seconds the run may take, above 0 and at most 30. Defaults to 30."
+}
    • Addedrun_tests
  3. 2 tool updates
    • First observedlist_compilers
    • First observedrun_code

Publisher details

Operator
MicroPyramid
Operator website
https://onlinecompiler.io
Vendor relationship
First-party
Documentation
https://onlinecompiler.io/docs#mcp
Trust center
https://onlinecompiler.io/security
Restrictions
Free API key required; 100,000 runs a month free

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