Code Runner
Last tested 2026-10-22
Score 80/100 · Last tested 2026-10-22 · Version tested 0.1.8 · Package mcp-server-code-runner · Repo formulahendry/mcp-server-code-runner
Summary: Code Runner completed an MCP handshake without credentials and exposed 1 tools.
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | npm install mcp-server-code-runner (Node 20, Linux) succeeded in 2s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 1 tools listed in 5.9s. |
| maintenance | partial | 5 | Repo pushed 258 days before test. |
| docs | pass | 15 | README over 3,000 chars; install instructions present; mcpServers config example present. Automated check of the package's own README (README shipped in npm package). |
| license | pass | 10 | MIT (OSI-approved). |
Local-model readiness
Schema context cost: ~177 tokens for 1 tools (677 bytes) · about 2% of an 8k context. Method: tiktoken cl100k_base over compact JSON of name+description+inputSchema (approximate).
Small-model friendly (schema heuristic, not a model result): high.
Small-model task runs: Not yet tested.
Not tested
We did not test behavior with real credentials, security, or performance under load. These are planned; see methodology.
Tools listed
run-code
Config used in our test
{
"mcpServers": {
"code-runner": {
"command": "npx",
"args": [
"-y",
"mcp-server-code-runner"
]
}
}
}FAQ
Is Code Runner deprecated?
No. mcp-server-code-runner was not deprecated or archived when we last tested it on 2026-10-22.
What replaces Code Runner?
Nothing; Code Runner is not deprecated as of 2026-10-22.
Does Code Runner need an API key?
No. It completed an MCP handshake with no credentials and listed 1 tools.
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