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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 alpha-stream.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).
Validates an email address for syntax correctness, disposable/burner provider status, role-account detection, and live DNS MX, SPF, and DMARC record health.
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://alpha-stream.agentdiet.dev/v1/mx-deliverability-verifier)
Output
Returns a structured object indicating email syntax validity, whether the domain is from a known disposable/burner provider, whether it is a role account (e.g. admin@, support@), and live DNS lookup results for MX records (mail server existence), SPF record presence and content, and DMARC policy — giving a comprehensive deliverability picture.
Example use cases
Lead list email hygiene check
“Before we import these sales leads, can you check if sarah.jones@startupco.io is actually deliverable — verify the MX records, SPF, DMARC, and flag it if it looks like a burner or role account?”
Signup fraud detection
“A user just signed up with the email temp1234@mailinator.com — is that a disposable or burner address? Check if it has valid MX records and whether we should block it.”
Email domain health audit
“We're about to send a cold outreach campaign and I want to make sure the recipient domain is set up correctly — can you validate info@acmecorp.com for MX, SPF, and DMARC records before we reach out?”
Technical details
Endpoint
POSThttps://alpha-stream.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single comprehensive check covering syntax, deliverability, disposable detection, role-account flagging, and DNS authentication records (MX, SPF, DMARC) in one call. It is particularly well-suited for AI agent workflows that need to qualify leads, validate signups, or audit outbound email domains before sending — especially in pipelines that support x402 USDC micropayment. Prefer it over basic syntax-only validators when DNS-level deliverability truth matters.
Side effects
- Invalid or malformed email string returns a syntax error response
- Domain does not exist in DNS — MX lookup returns empty or NXDOMAIN
- Temporary DNS resolution failures may cause intermittent lookup errors
- SPF or DMARC records absent — indicated in response flags rather than as an error
- Rate limiting or payment failure (HTTP 402) if USDC micropayment is not processed correctly
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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