{"slug": "268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one", "title": "268 open-source tests you can run on your own domain for $0.0005 each — and the one I built so AI agents can find them", "summary": "A developer built a catalog of 268 open-source domain-audit endpoints priced at $0.0005 per call, discoverable via the /.well-known/x402 standard path so AI agents can find and pay for them autonomously. The endpoints cover DNS, HTTP, TLS, email authentication, content-security, and performance/accessibility checks, plus buyer-side tools that let an agent price a cart, audit a seller for defects, and simulate an x402 settlement from an ephemeral key before spending real USDC. A five-call audit of a domain costs roughly $0.134, and the full pipeline fits in about 60 lines of code.", "body_md": "What they cost: **less than a coffeeshop dollar to test your entire prod stack**.\n\n```\n# 1. Pick what to test\nWORKFLOW = [\n    (\"/api/x402-cost-quote\",          \"path=/api/extract\"),\n    (\"/api/catalog-integrity-audit\",  \"url=https://yoursite.com\"),\n    (\"/api/buyer-wallet-preflight\",   \"path=/api/extract\"),\n]\n# 2. For each call, fetch → parse WWW-Authenticate → settle → retry\nfor path, q in WORKFLOW:\n    r = fetch(f\"https://host{path}?{q}\")\n    if r.status == 402:\n        pay = build_eip3009(path, r.headers[\"X-PAYMENT\"])\n        r = fetch(path, headers={\"X-PAYMENT\": b64(pay)})\n    print(path, r.status, r.json())\n```\n\nA 5-call audit of your domain costs `268 × $0.0005 = $0.134` (about 14 USDC cents). The full pipeline — endpoint picker, payment builder, error diagnoser, retry loop, JSON report — fits in 60 lines.\n\nI built it because **no single paid API service catalog existed** with this breadth at sub-cent pricing for AI agents. The full inventory lives at the standard `/.well-known/x402` discovery path. Every endpoint ships with an `extensions.bazaar` block describing its input/output schemas so any agent that fetches a 402 envelope can plan the next call without scraping sample bodies.\n\nSome of the endpoints:\n\n| Surface | What it does | Price | \n|---|---|---|\n| DNS | A/AAAA/MX/NS/TXT/CNAME/HTTPS/SRV/CAA/DS/DNSSEC/RPKI/AXFR/DANE-chain | $0.0005 | \n| HTTP | method-policy, smuggling-evidence, hop-by-hop-strip, encoding-integrity, QPACK-fingerprint, HTTP/3 readiness, CORS-runtime-attack, cache-poisoning, rate-limit-headers | $0.0005 | \n| TLS | cert-transparency monitoring, OCSP-stapling check, OCSP-must-staple, DANE/TLSA, MTA-STS policy validation, SVCB/HTTPSSVC parser | $0.0005 | \n|  | DKIM/SPF/DMARC rollup, BIMI selector rotation, MTA-STS policy violation parser, DANE/TLSA | $0.0005 | \n| Content-security | CSP-deep, CSP-inline-fidelity, CSP-source-list extraction, CSP-violation-replay, WASM-CSP analyzer | $0.0005 | \n| Performance + accessibility | Lighthouse-style performance, accessibility audit, carbon footprint, forms audit | $0.0005–$0.002 | \n| **Buyer-side tools** | **x402-cost-quote** (price any cart in 1 call),**catalog-integrity-audit** (score any seller's defects),**buyer-wallet-preflight** (live x402 settlement test from ephemeral key) | **$0.0005** | \n\nThe **buyer-side tools are the most novel**: instead of paying per-call hoping nothing breaks, an agent can now **price its full cart in one call**, **audit the seller for defects in another**, and **simulate an end-to-end settle from a funding-less ephemeral key in a third** — all before committing real USDC.\n\nBecause **time-to-insight matters more than cents-per-call**:\n\nIf you run an AI agent that ships anything to the public web, this catalog turns \"", "url": "https://wpnews.pro/news/268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one", "canonical_source": "https://dev.to/hal_gobvan_16a285d49bda97/268-open-source-tests-you-can-run-on-your-own-domain-for-00005-each-and-the-one-i-built-so-ai-3b1m", "published_at": "2026-10-21 14:04:30+00:00", "updated_at": "2026-10-21 14:10:15.501568+00:00", "lang": "en", "topics": ["ai-agents", "agent-protocols", "ai-tools", "developer-tools", "ai-infrastructure"], "entities": ["x402", "USDC", "EIP-3009", "Lighthouse"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one", "markdown": "https://wpnews.pro/news/268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one.md", "text": "https://wpnews.pro/news/268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one.txt", "jsonld": "https://wpnews.pro/news/268-open-source-tests-you-can-run-on-your-own-domain-for-0-0005-each-and-the-one.jsonld"}}