InboxGuards Email Check
Check emails before you send, and get a $1 SPF/DKIM/DMARC fix plan for your domain. Pay per call.
Connect it
Settings → Connectors → Add custom connector
URL: https://api.inboxguardstest.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.inboxguardstest.com/mcp{
"mcpServers": {
"email": {
"url": "https://api.inboxguardstest.com/mcp"
}
}
}claude mcp add --transport http email https://api.inboxguardstest.com/mcp{
"servers": {
"email": {
"type": "http",
"url": "https://api.inboxguardstest.com/mcp"
}
}
}4 tools, pulled live
validate_emailread-onlyFree. Check the syntax of an email address offline and get the normalized address and domain, before paying for check_email_address. No DNS lookup, no network request, no payment.
pricingread-onlyFree. Return the price of check_email_address (and of the HTTP-only email test report), the payment network (Base) and the receiving address. No input, no network request, no payment.
check_email_addressread-onlyCheck one email address before you send to it: syntax, whether the domain accepts mail (MX, null MX or implicit A record), a disposable-domain flag (public CC0 list of about 9,900 domains), a role-account flag (info@, support@, noreply@...) and a free-provider flag. Returns a verdict of ok, risky or undeliverable with plain reasons. Use validate_email first if you only need syntax. No SMTP probe i
email_fix_planread-onlyGet an email security fix plan for one domain: the exact SPF, DKIM and DMARC DNS records to publish (create / replace / keep, record name, value and why), in order, plus click-path steps for the domain's DNS host (Cloudflare, GoDaddy, Route 53, Namecheap, Squarespace/Google, Vercel and others). Reads live MX, NS, SPF, DKIM and DMARC; detects Google Workspace, Microsoft 365, Zoho, Proton, Fastmail,
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