# Email Deliverability Check Pack (MX, SPF, DMARC, DKIM, Score)

> Email Deliverability Check Pack (MX, SPF, DMARC, DKIM, Score) is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-25).

Checks a domain's full email deliverability configuration — MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI — and returns a 0–100 score, letter grade, and actionable fix list; optionally validates a single email address.

## Facts

- Endpoint: GET https://agent-data-tools.revmesh2074.workers.dev/pack/email-deliverability?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Provider: agent-data-tools.revmesh2074.workers.dev
- Website: https://agent-data-tools.revmesh2074.workers.dev
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-email-deliverability-check-52ecae2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mNG2sV1YlElefurDR1zpT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent-data-tools-revmesh2074-workers-dev-email-deliverability-check-52ecae2a
```

Example prompt: Can you run a full email deliverability check on mailchimp.com — I want to see its MX, SPF, DMARC, and DKIM setup, plus the overall score and any issues I should fix before sending a campaign?

## When to prefer this

Use this endpoint when you need a comprehensive, single-call email deliverability audit covering all major authentication protocols (SPF, DMARC, DKIM) plus modern standards (MTA-STS, TLS-RPT, BIMI) with a scored summary. It is ideal for pre-campaign checks, spam troubleshooting, and sender domain vetting. Prefer it over individual DNS lookup tools when you want a unified score and actionable fix list rather than raw DNS records. It uses only public DNS and never sends mail, making it safe to run on any domain.

## Known failure modes

- Domain does not exist or has no DNS records — returns empty or null fields with a low score
- Invalid domain format — may return an error or zero results
- DKIM selectors not found at common providers even if custom selectors exist — DKIM will appear unsupported
- Transient DNS lookup failures may cause partial results
- Email address validation may produce false negatives for obscure disposable domain lists

## How this service works

Email deliverability check. One call to check a domain's email setup: MX records, SPF and its all-policy, DMARC and its policy, DKIM keys at the common selectors (Google, Microsoft, Mailchimp and others), MTA-STS, TLS-RPT and BIMI, with a 0-100 score, a grade and a list of fixes; optionally also checks one address (syntax, MX, disposable domain). Uses public DNS only and sends no mail. Use before a campaign, when mail lands in spam, or to vet a sender domain.

## Output

Returns the domain's MX records (host and priority), SPF record and all-policy, DMARC record and policy, list of DKIM selectors found at common providers, boolean flags for MTA-STS, TLS-RPT, and BIMI, a 0–100 deliverability score, a letter grade, and an array of human-readable issues/fix recommendations. If an email address was provided, also returns address-level validation (syntax, MX reachability, disposable domain check).

## Request schema (JSON Schema)

```json
{
 "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": {
      "email": {
       "type": "string",
       "examples": [
        "support@github.com"
       ],
       "description": "Optional address to check as well"
      },
      "domain": {
       "type": "string",
       "examples": [
        "github.com"
       ],
       "description": "The sending domain, such as example.com (or a URL; its host is used)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "mx": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "host": {
          "type": "string"
         },
         "priority": {
          "type": "number"
         }
        }
       }
      },
      "spf": {
       "type": "string"
      },
      "bimi": {
       "type": "boolean"
      },
      "pack": {
       "type": "string"
      },
      "dmarc": {
       "type": "string"
      },
      "grade": {
       "type": "string"
      },
      "score": {
       "type": "number"
      },
      "domain": {
       "type": "string"
      },
      "failed": {
       "type": "object",
       "properties": {}
      },
      "issues": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "mtaSts": {
       "type": "boolean"
      },
      "tlsRpt": {
       "type": "boolean"
      },
      "address": {},
      "spfPolicy": {
       "type": "string"
      },
      "dmarcPolicy": {
       "type": "string"
      },
      "dkimSelectors": {
       "type": "array",
       "items": {
        "type": "string"
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mx": [
   {
    "host": "aspmx.l.google.com",
    "priority": 1
   }
  ],
  "spf": "v=spf1 ip4:… ~all",
  "bimi": false,
  "pack": "email-deliverability",
  "dmarc": "v=DMARC1; p=reject; …",
  "grade": "A",
  "score": 90,
  "domain": "github.com",
  "failed": {},
  "issues": [
   "no BIMI record"
  ],
  "mtaSts": true,
  "tlsRpt": true,
  "address": null,
  "spfPolicy": "~all",
  "dmarcPolicy": "reject",
  "dkimSelectors": [
   "google"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-email-deliverability-check-52ecae2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-data-tools.revmesh2074.workers.dev](https://www.zero.xyz/host/agent-data-tools.revmesh2074.workers.dev/llms.txt)