SiteCheck Regex Generator

x402

SiteCheck Regex Generator 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 2026-10-16).

Generates a tested regular expression pattern from example match/non-match strings and a plain-English description

Price / call$0.002

Seller volume →—

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StatusUnknown

How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Also: SEO metadata, link checking, redirect chains, security headers, mail DNS (SPF, DMARC, DKIM), QR codes, language detection, photo EXIF, identifier validation, image OCR, SEC filings, SEC financials, Congress bills, macro rates, UK company data, GitHub repo stats, Hacker News, Wikipedia, gas prices, Solana swap quotes, ERC-20 token checks, ENS names, EVM wallet balances, EVM balances, transactions and contract calls, Solana transactions and accounts, crypto prices, candles and order books, DeFi TVL, yields and stablecoins, SEC insider trades, weather, geocoding and holidays, IP owners and postcodes, npm, PyPI and crates package data and vulnerabilities, GitHub profiles, arXiv papers and DOIs, structured extraction, summaries, sentiment and reranking, HTML tables and RSS feeds, Bitcoin fees, addresses and transactions, Bitcoin address balances, Bitcoin transaction status, EVM calldata decoding, verified EVM contracts, Hyperliquid perpetual markets, Hyperliquid account positions, Polymarket odds, crypto fear and greed, DeFi fees, DEX volume, company registries of four countries, ISIN, CUSIP and ticker lookup, SEC full-text search, SEC 8-K events, FDA drug labels, FDA adverse event counts, clinical trials, PubMed articles, US federal grants, EU public tenders, NPI provider lookup, US address geocoding, USGS earthquakes, NWS weather alerts, sunrise and moon times, time zone conversion, distance and bearing, GDACS disaster alerts, llms.txt checks, AI crawler access, tracker and cookie audits, certificate transparency, site logos and icons, GitHub releases, GitHub issues, Stack Overflow answers, read-only Wikidata queries, text moderation, image descriptions, text classification, named entity extraction, PII redaction, phone number checks, cron explanations, JSON Schema validation, whale transfers, SSL certificate expiry, Markdown to HTML, PageSpeed scores, Product Hunt launches, sanctions screening (OFAC, EU, UN, UK), flight fare search, YouTube transcripts, speech to text from media links, perpetual funding rates, crypto technical indicators, crypto news headlines, crypto spot conversion, World Bank macro indicators, loan and investment calculator, grammar checks, readability scores, keyword extraction, text diffs, transliteration and slugs, text chunking, subtitle translation, tone rewrites, working days, date calculations, unit conversion, book lookup, food nutrition, airport lookup, tide predictions, nearby places, robots.txt checks, hashes, encode and decode, JWT inspection, UUIDs and passwords, User-Agent parsing, subdomain discovery, uptime checks, VIN decoding, UK EORI checks, SWIFT and BIC checks, stock ticker lookup, invoice extraction, resume parsing, address parsing, prediction-market data, multi-chain RPC and chain data, compliance and government data, web data, search and research, AI text jobs. Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

Output

Returns a JSON object containing: the generated regex pattern string, optional flags, a plain-English explanation of what the pattern matches, a test summary showing whether all provided match/non-match examples passed, counts of matches and non-matches tested, and a timestamp. A note reminds that the pattern was only verified against the provided examples.

Example use cases

Validate US zip code input

“I need a regex that matches valid US zip codes like '90210' and '10001' but rejects things like '9021' (too short), '902100' (too long), and 'ABCDE' (not digits). Can you generate one with an explanation?”

Match product SKU format

“Generate a regex pattern for our product SKUs — they look like 'SKU-ABC-001' or 'SKU-XYZ-999', always uppercase letters and 3 digits after the dash, but it should NOT match 'sku-abc-001' (lowercase) or 'SKU-AB-001' (only 2 letters).”

Extract ISO 8601 dates from logs

“I need a regex that matches ISO 8601 date strings like '2024-01-15' and '1999-12-31' but not '2024-1-5' (missing leading zeros) or '2024/01/15' (wrong separator) — give me the pattern and confirm it passes those tests.”

Technical details

Endpoint

POSThttps://api.sitecheck-api.workers.dev/api/regex/generate?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a tested regex generated from concrete examples rather than writing one by hand. It's especially useful when you can enumerate what should and shouldn't match but can't easily articulate the formal grammar. Prefer it over asking a general LLM for regex because the output is automatically back-tested against your examples and includes a pass/fail report.

Side effects

Invalid or contradictory match/non-match examples that cannot be reconciled into a single pattern
Too many or too few examples (outside 1-10 match items)
Examples exceed 300-character limit per string
Description too vague for pattern generation
Pattern generation may produce a pattern that overfits or underfits edge cases not covered by provided examples
Payment failure returns 402 status

Input

Schema · Request body

Field	Type	Description
matches	array	Strings the pattern must match (1-10 items, each max 300 characters)
nonMatches	array	Strings the pattern must not match (0-10 items, each max 300 characters)
description	string	What the pattern should match, in plain words (max 500 characters)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "note": "Tested only against the examples you gave; it may still match or miss other inputs.",
    "flags": "",
    "tests": {
      "passed": true,
      "matches": 2,
      "nonMatches": 3
    },
    "pattern": "^\\d{5}$",
    "checkedAt": "2026-10-15T18:21:15.842Z",
    "explanation": "The pattern ^\\d{5}$ matches a string that starts with and ends with exactly 5 digits, ensuring a five-digit postal code."
  }
}

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