Checks a domain's SPF, DMARC, DKIM and MX records and returns the parsed results as JSON, flagging common gaps such as SPF +all, more than 10 SPF DNS lookups, DMARC p=none and missing DKIM selectors.
Pay from $0.01 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.
ASSESSMENT
updated 4h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 1651ms
- avg response
- 907ms
- total checks
- 47
compliance A (11/11)
11 of 11 x402 conformance checks pass. Full checklist below.
price $0.01 (p62 in Data)
- price (min)
- $0.01
- category percentile (min)
- p62 in Data
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
traction $0.005 30d · 0 buyers
- volume 30d
- $0.005
- buyers 30d
- 0
- settlements 30d
- 1
- last settlement
- 2026-07-21
- top buyer share
- 60% of 30d volume
- trend 7d vs 30d
- 3.43x the 30d daily rate
- networks
- eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
Attributed pro-quota: this payout address is shared, so volume and buyers are the operator-level figure divided by the services sharing it. A declared convention, not an individually observed measure, and still a conservative undercount.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedChecks email authentication posture by parsing SPF, DMARC, DKIM and MX records for any domain and grades deliverability
- category
- email-auth
- in
- query params
- auth
- none
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| GET | /check | $0.01 | Base/Solana | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /check returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://email-auth.use.x402atlas.com/check'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x3731f5C2c1835E3aCe2AC157c4e31b1cEA0CB0e0",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"tier": "standard",
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
"merchant": "x402Atlas"
},
"payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://email-auth.use.x402atlas.com/check",
"mimeType": "application/json",
"description": "Email authentication posture check: parses SPF, DMARC and DKIM plus MX for any domain and grades deliverability/anti-spoofing gaps (SPF +all, SPF >10 lookups, DMARC p=none, missing DKIM). Clean JSON for deliverability and security-ops automation.",
"serviceName": "Email Auth Check (SPF/DMARC/DKIM)"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domain": "example.com",
"selector": "google"
}
},
"output": {
"type": "json",
"example": {
"mx": [
{
"host": "aspmx.l.google.com.",
"pref": 1
}
],
"spf": {
"record": "v=spf1 include:_spf.google.com ~all",
"mechanisms": [
{
"kind": "include",
"value": "_spf.google.com",
"qualifier": "+",
"causes_dns": true
},
{
"kind": "all",
"value": "",
"qualifier": "~",
"causes_dns": false
}
],
"dns_lookups": 1,
"all_qualifier": "~all"
},
"dkim": {
"found": [
{
"record": "v=DKIM1; k=rsa; p=MIGfMA0GCSq...",
"selector": "google"
}
],
"checked_selectors": [
"default",
"google",
"selector1",
"selector2",
"k1",
"dkim",
"mail"
]
},
"dmarc": {
"pct": 100,
"rua": [
"mailto:[email protected]"
],
"ruf": [],
"aspf": "s",
"adkim": "s",
"policy": "reject",
"record": "v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; adkim=s; aspf=s",
"subdomain_policy": ""
},
"domain": "example.com",
"warnings": [],
"queried_at": "2026-07-02T12:00:00Z",
"accepts_mail": true
}
}
},
"tags": [
"email",
"spf",
"dmarc",
"dkim",
"deliverability",
"security"
],
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string",
"pattern": "^[A-Za-z0-9-]{1,63}(\\.[A-Za-z0-9-]{1,63})*$",
"maxLength": 253,
"description": "Domain to check — hostname only, no scheme/IP literal, no trailing dot, no localhost, no local/internal/reserved suffix (.local, .internal, .localdomain, .lan, .test)"
},
"selector": {
"type": "string",
"description": "Optional DKIM selector to check authoritatively; if omitted, a common-selector list is probed"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"domain",
"queried_at",
"accepts_mail",
"mx",
"spf",
"dmarc",
"dkim",
"warnings"
],
"properties": {
"mx": {
"type": "array",
"items": {
"type": "object",
"properties": {
"host": {
"type": "string"
},
"pref": {
"type": "integer",
"maximum": 65535,
"minimum": 0
}
}
}
},
"spf": {
"type": [
"object",
"null"
],
"properties": {
"record": {
"type": "string"
},
"mechanisms": {
"type": "array",
"items": {
"type": "object",
"properties": {
"kind": {
"enum": [
"include",
"a",
"mx",
"ip4",
"ip6",
"all",
"exists",
"ptr",
"redirect",
"exp",
"unknown"
],
"type": "string"
},
"value": {
"type": "string"
},
"qualifier": {
"enum": [
"+",
"-",
"~",
"?"
],
"type": "string"
},
"causes_dns": {
"type": "boolean"
}
}
}
},
"dns_lookups": {
"type": "integer",
"minimum": 0,
"description": "count of lookup-causing terms; RFC 7208 limit is 10"
},
"all_qualifier": {
"enum": [
"-all",
"~all",
"?all",
"+all",
""
],
"type": "string",
"description": "qualifier on the all mechanism; empty when absent"
}
},
"description": "null when no SPF record is present"
},
"dkim": {
"type": "object",
"properties": {
"found": {
"type": "array",
"items": {
"type": "object",
"properties": {
"record": {
"type": "string"
},
"selector": {
"type": "string"
}
}
}
},
"checked_selectors": {
"type": "array",
"items": {
"type": "string"
},
"description": "exact selectors probed"
}
}
},
"dmarc": {
"type": [
"object",
"null"
],
"properties": {
"pct": {
"type": "integer",
"default": 100,
"maximum": 100,
"minimum": 0
},
"rua": {
"type": "array",
"items": {
"type": "string"
},
"description": "aggregate report addresses"
},
"ruf": {
"type": "array",
"items": {
"type": "string"
},
"description": "forensic report addresses"
},
"aspf": {
"enum": [
"r",
"s"
],
"type": "string",
"default": "r"
},
"adkim": {
"enum": [
"r",
"s"
],
"type": "string",
"default": "r"
},
"policy": {
"enum": [
"none",
"quarantine",
"reject",
""
],
"type": "string",
"description": "p= tag; empty when missing/invalid"
},
"record": {
"type": "string"
},
"subdomain_policy": {
"type": "string",
"description": "sp= tag; empty when absent (inherits policy)"
}
},
"description": "null when no DMARC record is present"
},
"domain": {
"type": "string"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
},
"description": "human-readable posture advisories; never null"
},
"queried_at": {
"type": "string",
"format": "date-time"
},
"accepts_mail": {
"type": "boolean",
"description": "true when the domain has at least one MX record"
}
}
}
}
}
}
},
"category": "domain-intelligence",
"routeTemplate": ":var1"
}
},
"x402Version": 2
}
] UPTIME
RECENT CHECKS
OVER TIME
All charts share the 24h window selected here. Every series is also served as JSON at /api/v1/services/email-auth-check-spf-dmarc-dkim/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted).
Shared payout address (19 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 20 services sharing it: a declared convention, not an individually observed measure.
Shared payout address (19 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service buyer count is attributed, the assessment block and the ranking, it is divided pro-quota by the 20 services sharing the address and can be fractional: a declared convention, not an individually observed measure.
COMPLIANCE
11/11 checks pass · grade A- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
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