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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-compiler.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-compiler.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the provider is flagged as disposable or burner, whether it's a role account, and the live DNS lookup results for MX, SPF, and DMARC records — giving an overall deliverability assessment.
Example use cases
Screen leads before CRM import
“Before I import this list of leads, can you check whether sarah.jones@acmecorp.io is a real deliverable email — tell me if it's disposable, has valid MX records, and has SPF and DMARC set up properly?”
Detect burner emails at signup
“A new user just signed up with user123@guerrillamail.com — can you verify if that's a disposable or burner email address and whether the domain actually has working mail server records?”
Audit outbound email domain health
“I'm about to send a campaign to contacts@newsletter-partner.com — can you check if that email address passes syntax validation and if the domain has proper MX, SPF, and DMARC DNS records configured?”
Technical details
Endpoint
GEThttps://mcp-compiler.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email verification that combines syntax checking, disposable provider detection, role account identification, AND live DNS record validation (MX, SPF, DMARC) together. It is ideal for agent workflows that must qualify leads, gate signups, or validate outbound contacts before sending email, and where per-address micropayment billing ($0.005) is preferable to subscription-based alternatives.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts may result in incomplete MX/SPF/DMARC results
- Domains with unusual or non-standard DNS configurations may return ambiguous results
- Payment failure (HTTP 402) if x402 micropayment is not completed
- Very new domains may not yet have DNS records propagated, leading to false negatives
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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