What do I need to run ClearRun? (Node.js 18 or newer)
Node.js 18 or newer for the CLI, SDK and MCP server. A ClearRun API key for real scores from those tools. A verified free account can create one developer key. Nothing to install to call the HTTP API.
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By tool
| Tool | You need |
|---|---|
CLI (@clearrun/cli) | Node.js 18 or newer. An API key to score |
SDK (@clearrun/sdk) | Node.js 18 or newer. An API key, unless you use mock mode |
MCP server (@clearrun/mcp) | Node.js 18 or newer, and an MCP host such as Claude Desktop, Claude Code, Cursor or VS Code. An API key to score |
| HTTP API | Any HTTP client, such as curl. An API key to score |
Check your Node.js version
node --versionIf it prints a version below 18, update Node.js first. The SDK uses the fetch built into Node.js 18.
Verdict lookups need less
Looking up a verdict id needs no key and no account. See How to look up a verdict with GET /api/verify/{verdictId}.