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Email address validation and quality scoring. Checks RFC-5322 syntax, detects disposable/throwaway domains (via Kickbox free API), and verifies DNS MX record presence (via Cloudflare DoH). Returns a quality score (0-100) and verdict: DELIVERABLE | RISKY | UNDELIVERABLE | INVALID. Useful for lead qualification, form validation, and filtering bot signups. -- reliability 87.19999694824219/100 per Paygent Discover

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general
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base
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cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://the-stall.intuitek.ai
/.well-known/x402.json
https://the-stall.intuitek.ai/.well-known/x402