Mail Security Tools
DMARC/SPF/DKIM/MX checks, email score, 100-domain bulk score, webhook watch alerts (x402 USDC).
Connect it
Settings → Connectors → Add custom connector
URL: https://api.mailsecuritytools.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.mailsecuritytools.com/mcp{
"mcpServers": {
"email-security": {
"url": "https://api.mailsecuritytools.com/mcp"
}
}
}claude mcp add --transport http email-security https://api.mailsecuritytools.com/mcp{
"servers": {
"email-security": {
"type": "http",
"url": "https://api.mailsecuritytools.com/mcp"
}
}
}7 tools, verified live
check_domain_email_securityread-onlyFree. Look up a domain's MX, SPF (record, DNS lookup count, all qualifier), DMARC (policy, rua) and DKIM (common selectors, key size) from live DNS and list issues. No payment.
pricingread-onlyFree. Prices of the paid tools, payment network and receiving address.
email_security_scoreread-onlyGrade a domain's email security 0-100 (A-F): SPF 30, DMARC 40, DKIM 25, MX 5, from live DNS, with findings and the top 3 fixes. Read-only. Costs $0.01 USDC via x402; errors are not charged.
check_email_addressread-onlyCheck one email address: syntax, MX / null MX, disposable domain, role account, free provider; verdict ok / risky / undeliverable. No SMTP probe. Costs $0.01 USDC via x402; errors are not charged.
email_fix_planread-onlyEmail security fix plan for one domain: the exact SPF, DKIM and DMARC records to publish (create / replace / keep, name, value, why), in order, with click-path steps for the domain's DNS host and a staged DMARC rollout. Non-sending domains get a lock-down set. Costs $1 USDC via x402; errors are not charged.
bulk_email_security_scoreread-onlyScore up to 100 domains' email security in one call (SPF 30, DMARC 40, DKIM 25, MX 5 from live DNS): per-domain score, grade and issues, plus a summary with grade counts, domains missing DMARC or SPF, and the worst 10. For MSPs and agents checking a client or vendor list. Costs $0.50 USDC via x402; errors are not charged.
watch_statusread-onlyFree. Status of a paid email setup watch (created with POST /v1/watch): items, expiry, last check, last webhook delivery and current SPF/DMARC/DKIM/MX state.
Change history
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