Email Deliverability Checker

x402

Email Deliverability Checker is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054001/call, status unknown (last checked 2026-10-10).

Checks email deliverability for a domain by validating SPF, DKIM, DMARC, MX records and blacklist status, returning a 0-100 deliverability score

Price / call$0.054001

Seller volume →—

Success—

StatusUnknown

How this service works

Check email deliverability for a domain: SPF, DKIM, DMARC, MX records, blacklist status. Returns 0-100 score.

Output

Returns a 0-100 deliverability score along with the status of SPF, DKIM, DMARC, and MX DNS records, plus blacklist check results for the queried domain

Example use cases

Example prompt

“Can you run a full email deliverability check on acme.com — I want to know the SPF, DKIM, DMARC, and MX record status, whether it's blacklisted, and the overall deliverability score?”

Technical details

Endpoint

GEThttps://api.strale.io/x402/email-deliverability-check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a comprehensive, scored audit of a domain's email deliverability posture including all major authentication records (SPF, DKIM, DMARC) and blacklist status in a single call, rather than checking individual DNS records manually

Side effects

Invalid or non-existent domain returns an error
Domain without any email records may return low score with missing record details
Network timeout if DNS lookups are slow
Malformed domain input may return 400 bad request

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "domain": "example.com"
    }
  }
}

Schema · Request body

Field	Type	Description
domainrequired	string

Output

{
  "spf": {
    "valid": true,
    "exists": true,
    "record": "v=spf1 -all",
    "mechanism": "-all (hard fail)"
  },
  "dkim": {
    "detected": true,
    "selector_found": "google"
  },
  "_meta": {
    "payment": {
      "method": "x402",
      "price_usd": 0.054000000000000006,
      "settlement_id": "0x31543a250ecc4b1144740e6369477440e1fb97677b7d8af2f45967417bc3dc35"
    },
    "capability": "email-deliverability-check",
    "latency_ms": 35,
    "provenance": {
      "source": "dns-analysis",
      "fetched_at": "2026-06-05T23:36:03.357Z"
    }
  },
  "dmarc": {
    "exists": true,
    "policy": "reject",
    "record": "v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s"
  },
  "grade": "A",
  "score": 100,
  "domain": "example.com",
  "issues": [],
  "mx_records": [
    {
      "exchange": "",
      "priority": 0
    }
  ],
  "blacklisted": false,
  "recommendations": [],
  "blacklists_checked": [
    {
      "name": "zen.spamhaus.org",
      "listed": false
    },
    {
      "name": "bl.spamcop.net",
      "listed": false
    },
    {
      "name": "b.barracudacentral.org",
      "listed": false
    }
  ]
}

Schema · Response

{
  "spf": {
    "type": "object"
  },
  "dkim": {
    "type": "object"
  },
  "dmarc": {
    "type": "object"
  },
  "grade": {
    "type": "string"
  },
  "score": {
    "type": "number"
  },
  "blacklisted": {
    "type": "boolean"
  }
}

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