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B2A Email Deliverability, MX, SPF & DMARC Verifier
B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from mcp-security.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record checks.
Price / call$0.005
Success—
StatusUnknown
How this service works
Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://mcp-security.agentdiet.dev/v1/email-verify)
Output
Returns a structured JSON object including: email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, support@), live DNS lookup results for MX records (mail server hostnames), SPF record presence and value, and DMARC policy record — giving a full deliverability and trust assessment for the email address.
Example use cases
SaaS signup fraud prevention
“Before activating this new account, verify that signup@tempmail.org isn't a disposable or burner email and that the domain actually has working MX records — flag it if it looks sketchy.”
B2B lead list hygiene
“I have a lead whose email is cfo@acmecorp.com — can you check if it's a real deliverable address with valid MX and DMARC records, and whether it's a role account, before we add it to our outreach sequence?”
Cold email domain audit
“Before I send a campaign to contacts at partnerdomain.io, verify that the domain has proper MX, SPF, and DMARC DNS records configured so my emails won't bounce or get flagged as spam.”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/email-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple regex syntax checking — specifically when you need live DNS MX/SPF/DMARC verification, disposable provider detection, and role account flagging in a single call. Prefer it over lightweight syntax-only validators when deliverability assurance matters, such as before CRM ingestion, email campaigns, or user onboarding flows where fake or undeliverable emails cause downstream costs.
Side effects
- Invalid or malformed email address provided — likely returns a syntax error or validation failure
- DNS lookup timeout if the domain is unreachable or slow to respond
- Domain does not exist (NXDOMAIN), resulting in no MX/SPF/DMARC data
- Payment failure via x402 protocol if USDC balance is insufficient
- Rate limiting if too many requests are made in a short window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | Email address to validate for syntax, MX deliverability, and disposable risk |
Output
Schema · Response
{
"type": "object"
}Reviews
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