# Webmail Lookup

> Webmail Lookup is a paid API for AI agents from webmaillookup.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).

Returns webmail provider information for a given email address or domain

## Facts

- Endpoint: POST https://webmaillookup.com/public_api/v1/get_webmail_info?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/webmail-lookup-ed8afc46
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DtpKqgnvBtL4oO7c8htJh

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 webmail-lookup-ed8afc46 -d '<json body>'
```

Example prompt: What webmail provider is used by john.doe@acmecorp.com? I need to know which platform handles their email.

## When to prefer this

Use this endpoint when you need to identify the webmail provider for a specific email address or domain, particularly for enriching contact records, tailoring email client instructions, routing support flows by provider, or gating integrations based on email platform. Prefer this over manual DNS/MX lookups when you need a quick, structured, human-readable provider result without doing raw DNS parsing yourself.

## Known failure modes

- Unknown or obscure domain with no detectable webmail provider returns empty or null provider data
- Invalid email format may result in a validation error or empty response
- Private or custom mail servers may not map to a known webmail provider
- Network timeout or service unavailability returns a server error
- Domain does not exist or has no MX records, resulting in no provider resolution

## How this service works

Look up webmail provider information

## Output

Returns webmail provider information associated with the given email address or domain, such as the provider name (e.g. Gmail, Outlook, Yahoo) and potentially configuration details about the mail hosting service.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "An email address or domain to look up"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/webmail-lookup-ed8afc46/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from webmaillookup.com](https://www.zero.xyz/host/webmaillookup.com/llms.txt)