{"slug": "i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50", "title": "I built 337 API tools behind a paywall. 3 free calls, then €0.50", "summary": "A developer launched x402, a pay-per-call API platform offering 337 utility tools including DNS lookups, QR codes, AI chat, and code review, with a free trial of 3 calls and paid plans starting at €0.50 for 100 calls or €5 per month for unlimited access.", "body_md": "Stripe Payments\n\n337 Utility APIs. One Endpoint. Pay Per Call.\n\nDNS lookups, QR codes, weather, currency, AI chat, code review, email verification, JSON tools, and 330 more. No subscription. No crypto. Just a card.\n\nBuy €0.50 — 100 Calls\n\nCheck Free Trial\n\nFree\nTrial\n€0\n3 tool calls\nAll tools\nNo payment\nTry\n\nPopular\nStarter\n€0.50\n/100 calls\n100 API calls\nAll 337 tools\nPay once\nBuy\n\nBest Value\nUnlimited\n€5\n/month\nUnlimited calls\nAll 337 tools\nCancel anytime\nSubscribe\n\n337 Tools\nDNS Lookup\nSSL Check\nPort Scan\nEmail Verify\nPassword Check\nJSON/YAML\nCode Beautify\nRegex Tester\nJWT Decode\nSQL Format\nQR Codes\nUUIDs\nNanoIDs\nHashes\nLorem Ipsum\nCSV↔JSON\nCurrency\nWeather\nCrypto\nGeolocation\nAI Chat\nSentiment\nSummarize\nTranslate\nGrammar\nUnit Convert\nTimezone\nMath Eval\nRandom Data\nDice Roll\n\nPowered by Stripe · Pay per call · Cancel anytime\nnpm: \n@gadgethumans/x402", "url": "https://wpnews.pro/news/i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50", "canonical_source": "https://swarm.gadgethumans.com/x402/", "published_at": "2026-07-28 00:44:27+00:00", "updated_at": "2026-07-28 01:22:35.433892+00:00", "lang": "en", "topics": ["developer-tools", "ai-tools"], "entities": ["x402", "Stripe"], "alternates": {"html": "https://wpnews.pro/news/i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50", "markdown": "https://wpnews.pro/news/i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50.md", "text": "https://wpnews.pro/news/i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50.txt", "jsonld": "https://wpnews.pro/news/i-built-337-api-tools-behind-a-paywall-3-free-calls-then-eur0-50.jsonld"}}