●

Email Auth Check (SPF/DMARC/DKIM)

Data PAYMENT-READY imported

payment-ready until 2026-08-20

imported from the x402 Bazaar, not submitted by the operator · own this service? claim it · or ask to be removed

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 Arbitrum One / Base / Polygon / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-07-02 · $1.49 all-time · settled via coinbase, payAI

BASE URL https://email-auth.use.x402atlas.com │ ENDPOINTS 1 │ NETWORK Arbitrum One / Base / Polygon / Solana │ ASSET USDC │ MEMBER SINCE 2026-07-20 │ MONITORED SINCE 2026-07-20

ASSESSMENT

updated 3h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 99.5%

uptime 24h: 100%
uptime 7d: 98%
uptime 30d: 99.5%
uptime 90d: 99.5%
response p95: 2521ms
avg response: 879ms
total checks: 2,084

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.01 (p53 in Data)

price (min): $0.01
category percentile (min): p53 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.

domain age: -
registrar: -
hosting: custom
domain created: ---

Identity facts, not a risk score.

traction $1.473 30d · 11 buyers

volume 30d: $1.473
buyers 30d: 11
settlements 30d: 196
first settlement: 2026-07-02
last settlement: 2026-08-13
top buyer share: 81% of 30d volume
trend 7d vs 30d: 1.21x the 30d daily rate
networks: eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $1.49
settlements all-time: 198
median settlement 30d: $0.01
max settlement 30d: $0.01
settled via: coinbase ($1.67, 191 tx), payAI ($0.05, 5 tx)

Attributed pro-quota: this payout address is shared, so volume is the operator-level figure divided by the services sharing it, while buyer and transaction counts stay whole. A declared convention, not an individually observed measure, and still a conservative undercount.

Currently sharing this payout address with Apple App Store Search, Reviews & App Data, Atlas Market Data, CoinGecko Crypto Price & Data (x402 Atlas), Crypto Perp Signals, DefiLlama Data API (x402 Atlas), DNS & WHOIS Domain Lookup, GDELT News Search and Timeline, Google Trends SEO Keyword Data, HTTP Security Headers Check, Hyperliquid Account Intelligence, Hyperliquid Market Data, Hyperliquid Prediction Markets Data (x402 Atlas), Image Optimizer & WebP Converter, Places & Local Business Search, Twitter/X Advanced Tweet Search, URL Unwrap / Redirect Tracer, Web Search, News & Page Reader, Wikipedia Article Summary, X (Twitter) Media Downloader.

Top buyer share is a concentration signal, not part of the ranking score.

CHANGES

6 events, detecting since 2026-07-24

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 1h ago (6 since 2026-07-24)

schema changed · 1h ago

schema removed GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","merchant":"x402Atlas","tier":"standard"}

schema added GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88","merchant":"x402Atlas","tier":"standard"}

schema changed · 3d ago

schema removed GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM","merchant":"x402Atlas","tier":"standard"}

schema added GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","merchant":"x402Atlas","tier":"standard"}

schema changed · 7d ago

schema added GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM","merchant":"x402Atlas","tier":"standard"}

schema changed · 7d ago

schema removed GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","merchant":"x402Atlas","tier":"standard"}

schema changed · 7d ago

schema added GET /check exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","merchant":"x402Atlas","tier":"standard"}

schema changed · 7d ago

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	DESCRIPTION	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/check		$0.01	Arbitrum One/Base/Polygon/Solana	USDC	header

1 endpoints

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.

// request

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": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "tier": "standard",
          "version": "2",
          "merchant": "x402Atlas"
        },
        "payTo": "0x3731f5C2c1835E3aCe2AC157c4e31b1cEA0CB0e0",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "tier": "standard",
          "version": "2",
          "merchant": "x402Atlas"
        },
        "payTo": "0x3731f5C2c1835E3aCe2AC157c4e31b1cEA0CB0e0",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:42161",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "tier": "standard",
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "merchant": "x402Atlas"
        },
        "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://email-auth.use.x402atlas.com/check",
      "tags": [
        "email",
        "spf",
        "dmarc",
        "dkim",
        "deliverability",
        "security"
      ],
      "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 SPF/DMARC/DKIM Check"
    },
    "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"
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. 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). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

30d UPTIME 99.5%

RESPONSE TIME

AVG RESP 880ms

PRICE (captured 402, USD)

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in Data

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

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.

DISTINCT BUYERS

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. Per-service buyer and transaction counts are shown whole (integers), not divided; only volume is attributed pro-quota. A declared convention, not an individually observed measure.

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-13 · last up 2026-08-13

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
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

15:22:18 UTC ● OK 1109ms

15:06:19 UTC ● OK 869ms

14:50:20 UTC ● SLOW 1786ms

14:34:12 UTC ● OK 757ms

14:18:20 UTC ● SLOW 1531ms

14:02:17 UTC ● OK 527ms

13:46:18 UTC ● OK 705ms

13:30:16 UTC ● OK 961ms

13:14:18 UTC ● OK 771ms

12:58:22 UTC ● SLOW 1536ms

12:42:17 UTC ● OK 885ms

12:26:17 UTC ● OK 890ms

12:10:14 UTC ● OK 526ms

11:54:18 UTC ● OK 676ms

11:38:18 UTC ● SLOW 1452ms

11:22:17 UTC ● OK 940ms

11:06:17 UTC ● OK 1108ms

10:50:18 UTC ● SLOW 1570ms

EMBED THIS BADGE

Show that Email Auth Check (SPF/DMARC/DKIM) is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

Email Auth Check (SPF/DMARC/DKIM) uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/email-auth-check-spf-dmarc-dkim?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/email-auth-check-spf-dmarc-dkim.svg" alt="Email Auth Check (SPF/DMARC/DKIM) listed on x402-list" height="28">
</a>

// Markdown

[![Email Auth Check (SPF/DMARC/DKIM) on x402-list](https://x402-list.com/badge/email-auth-check-spf-dmarc-dkim.svg)](https://x402-list.com/services/email-auth-check-spf-dmarc-dkim?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/email-auth-check-spf-dmarc-dkim?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/email-auth-check-spf-dmarc-dkim.svg?data=uptime" alt="Email Auth Check (SPF/DMARC/DKIM) uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/email-auth-check-spf-dmarc-dkim/update.