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NAKONETS JavaScript Syntax Checker
x402
NAKONETS JavaScript Syntax Checker is a paid API for AI agents from x402vercel.vercel.app, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-02).
Validates JavaScript source code for syntax errors, returning a boolean indicating whether the code is syntactically valid.
Price / call$0.5
Success—
StatusUnknown
How this service works
Pay-per-call deterministic utilities for CI diagnosis, data validation, JavaScript syntax checks, market snapshots and opportunity preflight.
Output
Returns a JSON object with a `validSyntax` boolean field — `true` if the submitted JavaScript text parses without errors, `false` if there are syntax errors. No error details or line numbers are returned in the current schema.
Example use cases
Pre-deploy JS syntax gate
“Before we deploy this JavaScript file, can you syntax-check this code to make sure it won't blow up at parse time? Here's the source: `const add = (a, b) => { return a + b; }`”
CI pipeline code validation
“I'm building a CI step — can you verify the syntax of this generated JavaScript function is valid before I run it: `async function fetchData(url) { const res = await fetch(url); return res.json() }`?”
Catching typos in AI-generated JS
“I had an AI write me this JavaScript snippet but I'm not sure if it's correct — can you just check whether the syntax is valid: `if (user.loggedIn) { console.log('Welcome') }`?”
Technical details
Endpoint
POSThttps://x402vercel.vercel.app/api/code/js-syntax?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, pay-per-call JavaScript syntax check — particularly useful in CI pipelines, agent-generated code workflows, or preflight validation before executing or deploying JS snippets. It is not a full linter or type-checker; prefer it over heavier tools when you just need a quick parse-validity signal without setting up a local Node.js environment.
Side effects
- Empty or missing `text` field may return an error or unexpected result
- Very large JavaScript files may hit payload size limits
- The endpoint validates syntax only — it does not catch runtime errors, type errors, or logical bugs
- Non-JavaScript languages submitted as text will likely return false
- Network or payment authorization failures return 402 if x402 payment is not properly attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | JavaScript source text to syntax-check |
Output
Schema · Response
{
"type": "json",
"example": {
"validSyntax": true
}
}Tags
x402
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