SiteCheck Code Explainer

x402

SiteCheck Code Explainer is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-03).

Analyzes a source code snippet to produce a plain-English explanation, summary, detected functions, line count, and potential bugs with severity ratings.

Price / call$0.002

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StatusUnknown

How this service works

Explains a code snippet (max 20,000 characters): detected language, a summary, a step-by-step explanation, the functions and classes it defines, and possible bugs and security issues with line numbers. Line numbers outside the snippet are dropped. Model-written: a finding is a lead to check, not a verified defect.

Output

Returns a JSON object containing: a plain-language summary of the code, an ordered list of steps explaining what the code does line by line, a list of detected functions with their line numbers, a list of issues each with a line number, severity (e.g. high/medium/low), and description, the total line count, the detected or provided programming language, and a timestamp. Issues are flagged as potential leads, not verified defects.

Example use cases

Debug a suspicious function

“I think there's a bug in this JavaScript function — can you analyze it and tell me what it actually does versus what it seems intended to do? Here's the snippet: `function multiply(x, y) { return x + y; }`”

Onboard a new developer to legacy code

“Can you walk me through this legacy Python function step by step so I can understand what it does before I modify it? Here's the code: `def process(data): return [x*2 for x in data if x > 0]`”

Code review automation for a PR

“Review this SQL snippet for any logic issues or potential problems and give me a severity-rated list of what you find: `SELECT * FROM orders WHERE status = 'active' OR 1=1;`”

Technical details

Endpoint

POSThttps://api.sitecheck-api.workers.dev/api/code/explain?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, pay-per-call AI-powered explanation of a code snippet without setting up a full code review pipeline. It is ideal for one-off code comprehension tasks, quick bug triage, or automated PR review where you want structured output (functions, issues, steps) rather than freeform prose. Prefer it over generic LLM chat for code when you need a consistent JSON schema with severity-rated issues and function maps.

Side effects

Code snippet exceeds 20,000 character limit — request rejected
Ambiguous or unparseable code may produce inaccurate explanations
Language misidentified if optional language field is omitted for obscure languages
LLM-based analysis may miss subtle runtime bugs that require execution context
Network or worker timeout for very large snippets near the character limit

Input

Schema · Request body

Field	Type	Description
code	string	Source code snippet (max 20,000 characters)
language	string	Language if you know it (optional; otherwise detected)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "note": "Issues are leads from a model, not verified defects. Line numbers outside the snippet were dropped.",
    "lines": 3,
    "steps": [
      "The function add is defined with two parameters a and b.",
      "The function returns the result of subtracting b from a."
    ],
    "issues": [
      {
        "line": 2,
        "severity": "high",
        "description": "The function named add is actually subtracting the numbers instead of adding them."
      }
    ],
    "summary": "The given code defines a function named add that takes two parameters and returns their difference.",
    "language": "Python",
    "checkedAt": "2026-10-15T18:21:10.372Z",
    "functions": [
      {
        "line": 1,
        "name": "add"
      }
    ]
  }
}

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