The latest articles on DEV Community by marcelocarlos0 (@marcelocarlos0_d26fbf81d6). https://dev.to/marcelocarlos0_d26fbf81d6 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4179464%2F5d2e772c-8af4-4e6d-b966-21f9b3ceac79.jpg https://dev.to/marcelocarlos0_d26fbf81d6 en marcelocarlos0 Mon, 12 Oct 2026 13:33:59 +0000 https://dev.to/marcelocarlos0_d26fbf81d6/validate-email-spfdkimdmarc-in-one-agent-tool-call-1lhh https://dev.to/marcelocarlos0_d26fbf81d6/validate-email-spfdkimdmarc-in-one-agent-tool-call-1lhh <p>AI agents that send outreach or accept signups usually stitch two things together:</p> <ol> <li>“Is this address disposable / role-based / syntactically valid?”</li> <li>“Does the domain even publish SPF, DKIM, DMARC?”</li> </ol> <p>I built <strong>EmailIQ</strong> so both fit in a single MCP tool: <code>analyze_email</code>.</p> <h2> What you get </h2> <ul> <li>Syntax + domain exists + MX</li> <li>SPF / DKIM / DMARC presence checks</li> <li>Disposable + role-account flags</li> <li>Mail provider guess</li> <li>Composite score 0–100</li> </ul> <p>Price on Apify: <strong>$0.01</strong> per successful analysis (pay-per-event). There’s also an x402 HTTP API at <a href="https://emailiq.dev" rel="noopener noreferrer">emailiq.dev</a> for agent wallets (USDC on Base).</p> <h2> Honest limits </h2> <ul> <li>DKIM here is <strong>selector presence</strong>, not signature verification.</li> <li>Consumer Gmail often uses rotated selectors, so <code>user@gmail.com</code> may show <code>dkim_enabled=false</code> and score ~90 — that’s expected.</li> <li>This is <strong>per-address</strong>, not a bulk list cleaner. If you need 10k rows, use a bulk verifier.</li> </ul> <h2> Try it </h2> <ul> <li>Actor: <a href="https://apify.com/marcelocarlos/emailiq-mcp" rel="noopener noreferrer">https://apify.com/marcelocarlos/emailiq-mcp</a> </li> <li>MCP endpoint (needs your Apify token as Bearer): <code>https://marcelocarlos--emailiq-mcp.apify.actor/mcp</code> </li> <li>Docs for agents: <a href="https://emailiq.dev/llms.txt" rel="noopener noreferrer">https://emailiq.dev/llms.txt</a> </li> </ul> <p>If you build agent workflows around lead quality, I’d love a critique of the schema.</p> agents apify mcp email