# x402-tools-hub Code Explainer

> x402-tools-hub Code Explainer is a paid API for AI agents from tools-hub-v4-xi.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-13).

Accepts a code snippet and returns a plain-language explanation of what the code does

## Facts

- Endpoint: POST https://tools-hub-v4-xi.vercel.app/api/code-explain
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-hub-code-explainer-b56be3a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Wac_z0mQzjzWvaPAnTrFq

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-tools-hub-code-explainer-b56be3a2 -d '<json body>'
```

Example prompt: Can you explain what this Python function does in plain English? Here's the code: `def factorial(n): return 1 if n <= 1 else n * factorial(n-1)` — give me a clear, beginner-friendly breakdown.

## When to prefer this

Choose this endpoint when an AI agent needs to produce a human-readable explanation of a code snippet on behalf of a user — particularly useful in developer tool pipelines, documentation generators, or learning assistants. Prefer this over general LLM calls when you need a metered, pay-per-use code explanation service integrated into an x402 payment workflow.

## Known failure modes

- Empty or missing code input returns an error
- Extremely large code snippets may be truncated or rejected
- Unsupported or obfuscated code may produce inaccurate explanations
- Payment failure (non-200 402 response) if USDC payment is not correctly attached
- Rate limiting or server errors from the Vercel-hosted backend

## How this service works

Agent Toolkit + AI Gateway + Alpha Scraper — 13 paid endpoints for AI agents.

## Output

A plain-language explanation of the submitted code snippet, describing what the code does, how it works, and the logic behind its key components. The response is intended to be human-readable and accessible regardless of the reader's technical level.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-hub-code-explainer-b56be3a2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tools-hub-v4-xi.vercel.app](https://www.zero.xyz/host/tools-hub-v4-xi.vercel.app/llms.txt)