{"uid":"cap_AgO-t2Y85nBdY6V3AyaHy","slug":"whatchuneed-code-compare-b3a6fffd","name":"whatchuneed Code Compare","description":"320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.","url":"https://whatchuneed.vercel.app/api/code/compare","method":"POST","headers":{},"bodySchema":{"type":"object","required":["languages"],"properties":{"languages":{"type":"array"}}},"responseSchema":{"type":"object","properties":{"results":{"type":"array","items":{"type":"object","properties":{"stderr":{"type":"string"},"stdout":{"type":"string"},"time_ms":{"type":"number"},"exitCode":{"type":"integer"},"language":{"type":"string"}}}}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xGRu0V1rQW9WGm5BDjI5w","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Executes code snippets in multiple programming languages simultaneously and returns stdout, stderr, exit codes, and timing for each, enabling side-by-side language comparison.","exampleAgentPrompt":"Run a Fibonacci function in Python, JavaScript, and Go side by side and show me each language's output, any errors, and how long each one took to execute.","exampleUseCases":[{"title":"Algorithm speed comparison across languages","prompt":"I want to compare how fast bubble sort runs in Python vs Go vs Rust — can you run the same implementation in all three and tell me the execution times?"},{"title":"Cross-language output correctness check","prompt":"Run this string-reversal function in Python and JavaScript and show me what each one prints to stdout, any errors, and whether they both exit cleanly."},{"title":"Debugging language-specific behavior","prompt":"I have a recursive function that works in Python but I'm not sure about JavaScript — can you execute it in both and show me the stderr and exit codes so I can spot the difference?"}],"resultDescription":"An array of results, one per language, each containing: the language name, stdout (printed output), stderr (error output), exit code (0 for success), and execution time in milliseconds. Allows direct side-by-side comparison of behavior and performance across languages.","failureModes":["Unsupported language identifier causes missing or errored result for that language","Code with infinite loops may time out and return a non-zero exit code","Syntax errors surfaced in stderr with non-zero exit code","Network or sandbox failure returns empty results array","Malformed input (missing required 'languages' array) causes 400-level error"],"whenToPreferThis":"Choose this endpoint when you need to execute and compare code across multiple programming languages in a single call. It is ideal for benchmarking performance, verifying cross-language correctness, or demonstrating language-specific behavior differences. Prefer it over single-language execution endpoints when the goal is comparative analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:10:40.318Z","isFirstParty":false}