{"uid":"cap_Y5Idcd820aYbJjBIfmNMh","slug":"whatchuneed-code-explain-e56ee2ef","name":"whatchuneed Code Explain","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/explain","method":"POST","headers":{},"bodySchema":{"type":"object","required":["code","output","language"],"properties":{"code":{"type":"string"},"output":{"type":"string"},"language":{"type":"string"}}},"responseSchema":{"type":"object","properties":{"explanation":{"type":"string"},"suggestions":{"type":"array","items":{"type":"string"}},"output_breakdown":{"type":"array","items":{"type":"object"}}}},"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_XZvQnB2t4Odxvvia70nsd","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":"Analyzes a code snippet alongside its output and explains what the code does, why it produces that output, and offers improvement suggestions.","exampleAgentPrompt":"Can you explain what this Python function does and why it prints `[1, 4, 9, 16]` as output? Here's the code: `result = [x**2 for x in range(1,5)]; print(result)` — I want to understand the logic and any suggestions to improve it.","exampleUseCases":[{"title":"Debugging unexpected output","prompt":"I have this JavaScript snippet: `const arr = [1,2,3]; console.log(arr.map(x => x * 2).filter(x => x > 3));` and it outputs `[4, 6]` — can you explain why and tell me if there's a better way to write this?"},{"title":"Learning a new language concept","prompt":"I'm learning Python and wrote this: `def greet(name='World'): return f'Hello, {name}!'` and the output is `Hello, World!` — can you walk me through what the code is doing and suggest any improvements?"},{"title":"Code review for a junior developer","prompt":"Please explain this Java method to me: `public int factorial(int n) { return n <= 1 ? 1 : n * factorial(n-1); }` — the output for input 5 is `120`, and I want to understand how recursion is working here and if there are any issues with the approach."}],"resultDescription":"Returns a natural language explanation of what the submitted code does and why it produces the given output, an array of improvement suggestions, and a structured output breakdown mapping code execution steps to output segments.","failureModes":["Missing required fields (code, output, or language) returns a 400 validation error","Unsupported or misidentified language may produce an inaccurate explanation","Very large code snippets may hit token or payload size limits","Payment failure via x402 protocol results in a 402 response before processing","Ambiguous or non-deterministic output may result in a generic or imprecise explanation"],"whenToPreferThis":"Choose this endpoint when you need to explain code alongside its actual runtime output — particularly useful when debugging, onboarding junior developers, or learning a new language. Prefer this over generic LLM completions when you want a structured response with discrete suggestions and an output breakdown tied to specific code segments, and when pay-per-call pricing via x402 fits your usage pattern.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:51:08.257Z","isFirstParty":false}