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whatchuneed Code Explain
x402
whatchuneed Code Explain is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).
Analyzes a code snippet alongside its output and explains what the code does, why it produces that output, and offers improvement suggestions.
Price / call$0.2
Success—
StatusUnknown
How this service works
320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.
Output
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.
Example use cases
Debugging unexpected output
“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?”
Learning a new language concept
“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?”
Code review for a junior developer
“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.”
Technical details
Endpoint
POSThttps://whatchuneed.vercel.app/api/code/explainWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| coderequired | string | |
| outputrequired | string | |
| languagerequired | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| explanation | string | |
| suggestions | array | |
| output_breakdown | array |
Tags
x402
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