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Delx Commerce — Email SPF Alignment Check
x402
Delx Commerce — Email SPF Alignment Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Checks whether the From domain and MAIL FROM domain are SPF-aligned (relaxed or strict) for DMARC compliance purposes
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object indicating whether the two domains are SPF-aligned (aligned: true/false), the mode used (relaxed or strict), and a pass/fail status. Also includes verifiable evidence: an input SHA-256 hash, number of external calls made (0 for privacy), and a flag confirming no data was retained.
Example use cases
DMARC compliance verification for bulk sender
“I'm setting up a bulk email campaign and want to make sure my From domain 'marketing.mybrand.com' and MAIL FROM domain 'send.mybrand.com' are SPF-aligned in relaxed mode before we go live.”
Email deliverability debug for transactional mail
“Our transactional emails from 'noreply@app.example.com' are failing DMARC — can you check if the MAIL FROM domain 'bounce.sendgrid.net' is SPF-aligned with 'app.example.com' in strict mode?”
Pre-send SPF alignment audit for new subdomain
“We just set up a new subdomain 'alerts.company.io' for sending notifications, with MAIL FROM 'mta.company.io' — can you verify the SPF alignment in relaxed mode to make sure we won't get flagged?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/email-spf-alignment-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call, no-signup check of SPF alignment between a From domain and MAIL FROM domain as part of DMARC validation. It is ideal for agents that need to verify email authentication configuration programmatically without retaining input data. Prefer it over full DMARC audit services when you only need the SPF alignment result and want verifiable, privacy-preserving computation with USDC micropayment billing.
Side effects
- Invalid or missing from_domain or mail_from_domain fields causing a 400 error
- Unsupported mode value (only 'relaxed' or 'strict' expected)
- Payment not included or invalid USDC payment via x402 causing a 402 response
- Malformed domain strings resulting in parse errors
- Network timeout if the service is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mode | string | Mode supplied to Email SPF Alignment Check; used only for this bounded calculation and processed in memory without retention. |
| from_domain | string | From Domain supplied to Email SPF Alignment Check; used only for this bounded calculation and processed in memory without retention. |
| mail_from_domain | string | Mail From Domain supplied to Email SPF Alignment Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"mode": "relaxed",
"aligned": true
},
"schema": "delx/util-email-spf-alignment-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "ea586d1c403c2ce4bdabccfde8d16390a6f39bd162622d5aa8ca6b864aa2c9de",
"external_calls": 0
},
"operation": "web_reliability:email_spf_alignment_check"
}
}Tags
x402
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