# Strale Email Deliverability Check

> Strale Email Deliverability Check is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054/call, status unknown (last checked 2026-09-14).

Checks whether a domain is configured for reliable email delivery by validating DNS records, MX, SPF, DKIM, and DMARC settings.

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/email-deliverability-check
- Price: $0.054/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-email-deliverability-check-d07b2c08
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CbJfowaJrYf770NYeGqs2

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 strale-email-deliverability-check-d07b2c08
```

Example prompt: Can you run an email deliverability check on example.com and tell me if its MX, SPF, DKIM, and DMARC records are properly configured?

## When to prefer this

Choose this endpoint when you need a multi-signal email deliverability assessment covering MX, SPF, DKIM, and DMARC in a single call with an audit trail. Prefer it over raw DNS lookup tools when compliance, trust verification, or chain-of-custody logging is required, especially in automated agent workflows that need verifiable results.

## Known failure modes

- Invalid or malformed domain name returns a validation error
- Non-existent domain returns DNS lookup failure
- Domain with no MX records returns low deliverability score
- Rate limiting or payment failure returns 402 or 429 error
- Temporary DNS resolution failures may cause transient errors

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns an assessment of the domain's email deliverability configuration, including presence and validity of MX records, SPF policy, DKIM records, and DMARC policy, along with an overall deliverability status and a cryptographically hashed audit record for trust verification.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ]
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string"
      }
     }
    }
   },
   "required": [
    "type",
    "method"
   ],
   "additionalProperties": false
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-email-deliverability-check-d07b2c08/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)