# Email Deliverability Audit API

> Email Deliverability Audit API is a paid API for AI agents from email-deliverability.api.klymax402.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).

Audits a domain's email deliverability by checking SPF, DKIM, DMARC, and MX DNS records

## Facts

- Endpoint: GET https://email-deliverability.api.klymax402.com/api/audit
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-deliverability-audit-api-ec403781
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NXl7LxvhNlEJFIW9gsG-J

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 email-deliverability-audit-api-ec403781
```

Example prompt: Can you run a full email deliverability audit on acmecorp.com and tell me whether the SPF, DKIM, DMARC, and MX records are properly configured?

## When to prefer this

Use this endpoint when you need a quick, automated audit of a domain's full email authentication stack (SPF, DKIM, DMARC, MX) in a single call, especially when diagnosing email deliverability problems or verifying that a domain is correctly configured before sending email campaigns.

## Known failure modes

- Missing or invalid domain parameter returns an error
- Non-existent domain may return empty or failed DNS lookups
- DNS lookup timeouts for slow-responding nameservers
- Malformed domain string (e.g. includes protocol) may cause parse errors
- Payment not completed may result in 402 response before audit runs

## How this service works

Audit email deliverability for a domain — checks SPF, DKIM, DMARC, MX records (POST variant)

## Output

Returns a structured audit report for the specified domain covering SPF record validity, DKIM configuration, DMARC policy presence and enforcement, and MX record setup — indicating which checks passed or failed and likely issues affecting email deliverability.

## 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": {
      "domain": {
       "type": "string",
       "description": "Domain to audit (e.g. example.com, gmail.com)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-deliverability-audit-api-ec403781/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-deliverability.api.klymax402.com](https://www.zero.xyz/host/email-deliverability.api.klymax402.com/llms.txt)