# Delx Commerce — Email MX Readiness Check

> Delx Commerce — Email MX Readiness Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Validates whether a set of DNS MX records indicate that a domain is ready and able to receive email.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/email-mx-readiness-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-email-mx-readiness-check-386c40f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-zLo1BP0CQMie4Qe7eFxF

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 delx-commerce-email-mx-readiness-check-386c40f5 -d '<json body>'
```

Example prompt: Can you check if these MX records I pulled from DNS mean the domain is actually ready to receive email: [{"exchange": "mx.acmecorp.com", "priority": 10}]?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call, no-signup validation of MX record readiness — especially in agentic pipelines where verifiable, tamper-evident evidence (input hash, no-retention flag) matters. It is preferable over full SMTP probing tools when you already have MX records and want a fast, in-memory check without external DNS lookups or persistent data storage.

## Known failure modes

- Empty or malformed records array returns a failed readiness check with no usable records
- Records exceeding 256 items may be rejected or truncated
- Invalid record object structure may cause parsing errors
- Network or service unavailability returns a non-200 response
- Payment failure via x402 protocol prevents the call from completing

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a readiness boolean, a list of usable MX records with exchange hostnames and priorities, a pass/fail status, and an evidence block containing an SHA-256 hash of the input, a flag confirming no data retention, and a count of external calls made — all under the delx/util-email-mx-readiness-check/v1 schema.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "records": {
   "type": "array",
   "items": {
    "type": "object",
    "maxProperties": 128,
    "additionalProperties": true
   },
   "maxItems": 256,
   "description": "Records supplied to Email MX Readiness Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "ready": true,
   "usable_records": [
    {
     "exchange": "mx.example.com",
     "priority": 10
    }
   ]
  },
  "schema": "delx/util-email-mx-readiness-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "2f2f55bbb9bea419341f4467faeb92d47276b73be2a24e15557a35a2e9286b7e",
   "external_calls": 0
  },
  "operation": "web_reliability:email_mx_readiness_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-email-mx-readiness-check-386c40f5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)