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Email Deliverability Check Pack (MX, SPF, DMARC, DKIM, Score)
x402
Email Deliverability Check Pack (MX, SPF, DMARC, DKIM, Score) is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-25).
Checks a domain's full email deliverability configuration — MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI — and returns a 0–100 score, letter grade, and actionable fix list; optionally validates a single email address.
Price / call$0.01
Success—
StatusUnknown
How this service works
Email deliverability check. One call to check a domain's email setup: MX records, SPF and its all-policy, DMARC and its policy, DKIM keys at the common selectors (Google, Microsoft, Mailchimp and others), MTA-STS, TLS-RPT and BIMI, with a 0-100 score, a grade and a list of fixes; optionally also checks one address (syntax, MX, disposable domain). Uses public DNS only and sends no mail. Use before a campaign, when mail lands in spam, or to vet a sender domain.
Output
Returns the domain's MX records (host and priority), SPF record and all-policy, DMARC record and policy, list of DKIM selectors found at common providers, boolean flags for MTA-STS, TLS-RPT, and BIMI, a 0–100 deliverability score, a letter grade, and an array of human-readable issues/fix recommendations. If an email address was provided, also returns address-level validation (syntax, MX reachability, disposable domain check).
Example use cases
Pre-campaign deliverability audit
“Before I send our newsletter tomorrow, can you check the email deliverability setup for acme.com — I need to know the score, grade, and any DNS issues with SPF, DMARC, or DKIM that could cause problems?”
Diagnosing emails landing in spam
“Our emails from updates.shopify.com keep ending up in spam — can you audit the full email setup there, including MX, SPF, DMARC, DKIM selectors, and MTA-STS, and tell me exactly what's misconfigured?”
Vetting a new sender domain
“I'm considering using newsletters.startup.io as our sending domain — can you check its email deliverability configuration, score it, and flag any missing or broken records I'd need to fix first?”
Technical details
Endpoint
GEThttps://agent-data-tools.revmesh2074.workers.dev/pack/email-deliverability?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a comprehensive, single-call email deliverability audit covering all major authentication protocols (SPF, DMARC, DKIM) plus modern standards (MTA-STS, TLS-RPT, BIMI) with a scored summary. It is ideal for pre-campaign checks, spam troubleshooting, and sender domain vetting. Prefer it over individual DNS lookup tools when you want a unified score and actionable fix list rather than raw DNS records. It uses only public DNS and never sends mail, making it safe to run on any domain.
Side effects
- Domain does not exist or has no DNS records — returns empty or null fields with a low score
- Invalid domain format — may return an error or zero results
- DKIM selectors not found at common providers even if custom selectors exist — DKIM will appear unsupported
- Transient DNS lookup failures may cause partial results
- Email address validation may produce false negatives for obscure disposable domain lists
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": [
{
"host": "aspmx.l.google.com",
"priority": 1
}
],
"spf": "v=spf1 ip4:… ~all",
"bimi": false,
"pack": "email-deliverability",
"dmarc": "v=DMARC1; p=reject; …",
"grade": "A",
"score": 90,
"domain": "github.com",
"failed": {},
"issues": [
"no BIMI record"
],
"mtaSts": true,
"tlsRpt": true,
"address": null,
"spfPolicy": "~all",
"dmarcPolicy": "reject",
"dkimSelectors": [
"google"
]
}
}Tags
x402
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