# Strale MX Lookup

> Strale MX Lookup is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-09-14).

Look up MX (Mail Exchange) DNS records for a given domain to verify email infrastructure and deliverability

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/mx-lookup
- Price: $0.0216/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-mx-lookup-e0e5f70a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VBGcYdZW-4-AM3X6Xt_XR

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-mx-lookup-e0e5f70a
```

Example prompt: Can you look up the MX records for stripe.com so I can see which mail servers handle their email and confirm the domain can receive messages?

## When to prefer this

Choose this endpoint when you need programmatically verified MX record data with an audit trail and cryptographic provenance hash — ideal for compliance workflows, agent pipelines requiring trust verification, or when you need to confirm email deliverability as part of a broader company/vendor validation flow. Prefer over raw DNS resolvers when auditability and structured JSON output matter.

## Known failure modes

- Domain does not exist — returns empty or NXDOMAIN result
- Domain has no MX records configured — returns empty record set
- Malformed domain input — validation error on the domain query parameter
- DNS timeout or upstream resolver failure — service error response
- Rate limiting or payment failure — 402 or 429 response

## 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 the MX (Mail Exchange) DNS records for the queried domain, including mail server hostnames and their priority values, along with a Strale audit record containing a cryptographic chain hash for provenance verification.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-mx-lookup-e0e5f70a/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)