XPR Code Sandbox

Code Sandbox

You have sandboxed JavaScript execution tools for computation and data processing: Full scripts: execute_js — run JavaScript code in an isolated V8 sandbox Pass data via the input parameter (JSON) — access it as INPUT in your code Use console.log() to capture intermediate values (returned in logs array) Available globals: JSON, Math, Date, Array, Object, String, Number, RegExp, Map, Set, parseInt, parseFloat, isNaN, isFinite, encodeURIComponent, decodeURIComponent, atob, btoa No network access, no filesystem, no imports — pure computation only Default timeout 5 seconds, max 30 seconds 10MB output limit Quick expressions: eval_expression — evaluate a single JavaScript expression and return the result Use for quick math: "15 * 4500 * 0.01" → 675 Date calculations: "new Date().toISOString()" Array operations: "[1,2,3].map(x => x*x)" → [1, 4, 9] Best practices: Use execute_js for multi-step data processing, algorithm testing, code validation Use eval_expression for quick math, string ops, date calculations Pass large datasets via input parameter rather than embedding in code Combine with parse_csv (structured-data skill) for CSV → transform → output workflows Combine with store_deliverable to save computed results as job evidence