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SYNTHORA Deliverability
x402
SYNTHORA Deliverability is a paid API for AI agents from deliverability.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Audits a domain's email deliverability by checking SPF, DKIM, DMARC, BIMI, MX, and PTR records and returning a spam score with prioritized fixes.
Price / call$0.001
Success—
StatusUnknown
How this service works
Audit a domain's email deliverability and sender reputation. Checks SPF, DKIM selectors, DMARC policy strength (reject/quarantine/none), BIMI, MX and PTR records, returning a spam score and prioritized fixes. Use it to assess inbox placement, email authentication and domain reputation before sending. Deterministic DNS-only, Ed25519-signed. 0.001 USDC on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<your Base address> (no payment); then \0.001 USDC per call.
Output
A JSON object containing the domain's MX records, SPF configuration, DKIM selector details, DMARC policy level (reject/quarantine/none), BIMI status, PTR records, a numeric spam score (0-100), an overall verdict (e.g. 'good'), and a prioritized list of actionable recommendations to improve deliverability.
Example use cases
Pre-campaign sender reputation check
“Before I send out our newsletter tomorrow, can you audit deliverability.example.com and tell me if our SPF, DKIM, and DMARC are all properly configured and what our spam score looks like?”
Diagnose emails landing in spam
“Our transactional emails from notifications.acme.com keep ending up in spam — can you check the full email authentication setup including MX, PTR, and DMARC policy and give me a list of things to fix?”
Verify new domain email readiness
“I just set up email on startup.io and I want to make sure everything is configured correctly — can you audit the domain's deliverability and tell me if BIMI is set up and whether DMARC is at reject strength?”
Technical details
Endpoint
POSThttps://deliverability.hergertsynthora.com/service?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, all-in-one email authentication audit covering SPF, DKIM, DMARC, BIMI, MX, and PTR in a single DNS-only call with a spam score and prioritized remediation list. Prefer it over manual per-record DNS lookups when you want a verdicted, scored summary rather than raw DNS data. It is especially useful before email campaigns, when troubleshooting inbox placement, or when onboarding a new sending domain.
Side effects
- Domain not found or non-existent DNS — returns error or empty record sets
- Malformed domain input — validation error returned
- DKIM selectors unavailable or not published — partial result with missing DKIM data
- Timeout on DNS resolution for slow nameservers — may return incomplete results
- Rate limit exceeded without wallet header — payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Domain or email address to audit |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "deliverability",
"result": {
"mx": [],
"spf": {},
"dkim": {},
"dmarc": {},
"score": 100,
"domain": "example.com",
"verdict": "good",
"recommendations": []
}
}
}Tags
x402
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