# x402.forgemesh.io Email Deliverability Check

> x402.forgemesh.io Email Deliverability Check is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Validates email address format and checks whether the domain has active mail servers, returning deliverability status and MX host list

## Facts

- Endpoint: POST https://x402.forgemesh.io/email-deliverability-check
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-forgemesh-io-email-deliverability-check-a864e365
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6WPOJ43zU6x5-ptaLAGIG

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 x402-forgemesh-io-email-deliverability-check-a864e365 -d '<json body>'
```

Example prompt: Can you check whether the email address john.doe@acmecorp.com is properly formatted and whether that domain actually has mail servers set up to receive messages?

## When to prefer this

Use this endpoint when you need lightweight, privacy-safe email validation that confirms both syntax correctness and domain-level mail server existence without probing the specific mailbox. Ideal for lead list cleaning, signup form validation, and bulk email hygiene where you want to filter obviously undeliverable addresses without sending test messages. Nothing is stored, making it safe for PII handling. Prefer this over full SMTP probing services when you only need domain-level deliverability confidence.

## Known failure modes

- Malformed email address returns invalid format error
- Domain has no MX records — deliverable flag is false
- Domain does not exist or DNS lookup fails
- Network timeout during MX record resolution
- Missing required email field returns validation error

## How this service works

Checks whether an email address is well-formed and whether its domain actually has working mail servers, returning the parsed domain, the sorted list of mail hosts, and a deliverable flag. Doesn't probe the specific mailbox, only the domain's mail setup. Built for lead-list cleaning and signup-form validation agents. Nothing is stored.

## Output

Returns the parsed domain from the email, a sorted list of MX mail host records for that domain, and a boolean deliverable flag indicating whether the domain has a working mail setup. Does not confirm whether the specific mailbox exists, only whether the domain can receive email.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to validate"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "someone@example.com",
  "domain": "example.com",
  "mx_hosts": [],
  "deliverable": false,
  "syntax_valid": true,
  "interpretation": "domain has no mail service — undeliverable"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-forgemesh-io-email-deliverability-check-a864e365/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.forgemesh.io](https://www.zero.xyz/host/x402.forgemesh.io/llms.txt)