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SYNTHORA Email Deliverability Check
x402
SYNTHORA Email Deliverability Check is a paid API for AI agents from deliver.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Audits a domain or email address for SPF, DKIM, DMARC, MX records and returns a deliverability/spam score via DNS-only lookup
Price / call$0.05
Success—
StatusUnknown
How this service works
Email deliverability and spam check: given a domain or email address, returns SPF, DKIM (common selectors), DMARC, MX records and a deliverability/spam score. DNS-only, deterministic, Ed25519-signed. Pay-per-use via x402 USDC on Base.
Output
Returns SPF record details, DKIM results for common selectors, DMARC policy, MX records, and a numeric deliverability/spam score — all derived from live DNS lookups and signed with Ed25519 for authenticity.
Example use cases
Example prompt
“Can you do a full email deliverability check on example.com — I want to see the SPF, DKIM, DMARC, and MX records along with the spam score?”
Technical details
Endpoint
POSThttps://deliver.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need a deterministic, DNS-only deliverability audit for a single domain or email address and want a combined SPF/DKIM/DMARC/MX result plus a spam score in one call. Ideal for automated compliance checks, pre-send domain validation, or diagnosing email delivery problems. The Ed25519-signed response is useful when you need verifiable, tamper-evident results.
Side effects
- Domain not found or does not exist — DNS resolution failure
- Invalid domain or email format in input — validation error
- No SPF/DMARC/DKIM records found — returns missing/empty for those fields
- Payment not provided or insufficient — x402 payment required error
- Rate limiting or DNS timeout — upstream DNS error 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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