# email-check > Email validation API: RFC syntax, MX/A lookup via DNS-over-HTTPS, 9,900+ disposable domains, role addresses (info@, support@) and typo suggestions (gmial.com → gmail.com). $0.002 per call or 50 for $0.02 via x402 (USDC on Base). Free demo, no account. - Base URL: https://email-check.restockalarm.workers.dev - Pay per call via x402: USDC on Base (eip155:8453) or Polygon PoS (eip155:137), payTo 0x7B97303d62517eA9E26D1E1b199Eac42a487F430 - Free demo: 3 calls/day per IP under /demo/... - Card alternative: X-API-Key header. Credit packs (all APIs): 250 calls $1.25 https://space-command-kits-shop.fourthwall.com/products/api-credits-250-calls | 1000 calls $5 https://space-command-kits-shop.fourthwall.com/products/api-credits-1000-calls | 5000 calls $15 https://space-command-kits-shop.fourthwall.com/products/api-credits-5000-calls; claim key https://api-keys.restockalarm.workers.dev/claim - OpenAPI: https://email-check.restockalarm.workers.dev/openapi.json - Manifest: https://email-check.restockalarm.workers.dev/.well-known/x402.json ## Endpoints - GET https://email-check.restockalarm.workers.dev/v1/check?email={email} — $0.002 — Validate one email: syntax, MX, disposable, role, typo suggestion - POST https://email-check.restockalarm.workers.dev/v1/bulk — $0.02 — Validate up to 50 emails in one call ## Related - https://web-md.restockalarm.workers.dev — URL → Markdown - https://url-meta.restockalarm.workers.dev — Link preview / OG metadata - https://qr-gen.restockalarm.workers.dev — QR code generator - https://json-tool.restockalarm.workers.dev — JSON toolbox - Catalog: https://product-katalog.restockalarm.workers.dev/llms.txt