# Is Email Hosted by Hey

> Is Email Hosted by Hey is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Checks whether a domain's email is hosted by Hey (hey.com) by looking up MX records via Cloudflare DoH and matching against Hey's mail-exchanger patterns.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/email/hosted-by/hey?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-email-hosted-by-hey-b023cbd9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zSsOHQwYGfg8eRBWl3G5u

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 is-email-hosted-by-hey-b023cbd9
```

Example prompt: Can you check if notion.so uses Hey for their email? I want to know if their MX records point to Hey's mail servers.

## When to prefer this

Choose this endpoint when you specifically need to detect Hey (hey.com) as an email provider for a domain. It is purpose-built for Hey detection using live MX record lookups via Cloudflare DoH, making it more accurate and current than static provider databases. Prefer it for sales intelligence, email migration planning, or deliverability audits where confirming Hey hosting is the specific question.

## Known failure modes

- Domain does not exist or has no MX records — returns no match with empty MX list
- Cloudflare DoH is temporarily unreachable — lookup fails with an error
- Domain is valid but uses a custom MX setup that partially resembles Hey — may return false negative
- Malformed domain input causes request rejection

## How this service works

Is the domain's email hosted by hey? Looks up the MX records (Cloudflare DoH) and matches them against hey's mail-exchanger patterns, returning yes/no, the MX hosts and which matched. Provider detection for deliverability, sales and migration work. $0.01 per lookup.

## Output

Returns a yes/no answer on whether the domain's email is hosted by Hey, along with the full list of MX hosts discovered and which specific MX records matched Hey's known mail-exchanger patterns.

## 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",
     "properties": {}
    }
   },
   "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/is-email-hosted-by-hey-b023cbd9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email.intel.rallylive.ca](https://www.zero.xyz/host/email.intel.rallylive.ca/llms.txt)