{"uid":"cap_EEcKcOrutp8Sw80dcU4fV","slug":"nakonets-javascript-syntax-checker-ec7f8709","name":"NAKONETS JavaScript Syntax Checker","description":"Pay-per-call deterministic utilities for CI diagnosis, data validation, JavaScript syntax checks, market snapshots and opportunity preflight.","url":"https://x402vercel.vercel.app/api/code/js-syntax?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"JavaScript source text to syntax-check"}}},"responseSchema":{"type":"json","example":{"validSyntax":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.5","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":"$0.5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ts4twqCscMIehpKEsnerQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates JavaScript source code for syntax errors, returning a boolean indicating whether the code is syntactically valid.","exampleAgentPrompt":"Can you check if this JavaScript snippet is syntactically valid: `function greet(name) { return 'Hello, ' + name; }`?","exampleUseCases":[{"title":"Pre-deploy JS syntax gate","prompt":"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; }`"},{"title":"CI pipeline code validation","prompt":"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() }`?"},{"title":"Catching typos in AI-generated JS","prompt":"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') }`?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T03:22:40.804Z","isFirstParty":false,"canonicalSlug":"nakonets-javascript-syntax-checker-ec7f8709"}