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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 verification.
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/mx-check)
Output
Returns a structured JSON object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether the address is a role account (e.g. info@, support@), and the live DNS lookup results for MX, SPF, and DMARC records — giving a complete deliverability and security posture assessment of the email address.
Example use cases
Pre-send lead list email scrubbing
“Before we import these leads into our CRM, can you check whether contact@techstartup.io is actually deliverable — does it have working MX records, is it a disposable address, and does the domain have SPF and DMARC set up?”
Sign-up fraud prevention check
“A user just registered with the email temp.user123@mailnull.com — can you tell me if that's a throwaway burner address and whether it would even receive email?”
Cold outreach domain health audit
“I'm about to send a cold email campaign to prospects at acmecorp.com — can you verify that sales@acmecorp.com is a valid address, not a role account, and that the domain has proper SPF and DMARC records configured?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checking — specifically when you need live DNS MX/SPF/DMARC verification combined with disposable provider detection and role account flagging in a single call. Prefer this over basic regex validators or static list checkers when deliverability accuracy and email security posture matter, such as before CRM imports, cold outreach campaigns, or user registration flows where fraud prevention is important.
Side effects
- Invalid or malformed email address input — returns syntax error
- Domain has no MX records — flagged as undeliverable
- DNS lookup timeout — temporary failure on live record checks
- Disposable provider list may not cover all burner services — possible false negatives
- Rate limiting or payment failure via x402 protocol — call blocked
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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