Check a domain's email authentication: SPF record and its all-mechanism and look...
https://onchaincheck.dev/email/authOverview
Check a domain's email authentication: SPF record and its all-mechanism and lookup count, DMARC policy, DKIM at common selectors, MX hosts and mail provider, and BIMI, with plain findings and an A-F grade. Answers whether mail from the domain can be spoofed and whether it is set up to reach inboxes. Errors return 4xx/5xx JSON and aren't charged.
Protocol
x402
Price
$0.0020
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Email & VAT Validation
Source
bazaar
Indexed
2026-11-10 15:08:49
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"domain": "stripe.com"
},
"type": "http"
}
Output Schema
{
"example": {
"bimi": false,
"checkedAt": "2026-11-10T12:09:55.581Z",
"dkim": {
"selectorsChecked": [
"google",
"selector1",
"selector2",
"k1",
"s1"
],
"selectorsFound": [
"google",
"s1"
]
},
"dmarc": {
"pct": 100,
"policy": "reject",
"record": "v=DMARC1; p=reject; pct=100; fo=1; rua=mailto:dmarc-reports@stripe.com; ruf=mailto:dmarc-forensics@stripe.com;",
"reporting": true,
"subdomainPolicy": null
},
"domain": "stripe.com",
"findings": [],
"grade": "A",
"mx": [
{
"host": "aspmx.l.google.com",
"priority": 10
},
{
"host": "alt1.aspmx.l.google.com",
"priority": 20
},
{
"host": "alt2.aspmx.l.google.com",
"priority": 20
},
{
"host": "aspmx2.googlemail.com",
"priority": 30
},
{
"host": "aspmx3.googlemail.com",
"priority": 30
}
],
"notes": "Read live from DNS (Cloudflare's resolver). DKIM is checked at common selectors only (a custom selector won't be found). grade A-F: F means anyone can spoof the domain.",
"provider": "Google Workspace",
"spf": {
"all": "~",
"lookups": 3,
"multiple": false,
"record": "v=spf1 ip4:198.2.180.60/32 ip4:13.111.2.227/32 include:spf1.stripe.com include:greenhouse-outbound-mail.stripe.com include:_spf.qualtrics.com ~all"
}
},
"type": "json"
}