# Tomba Email Verifier via x402.orthogonal.com

> Tomba Email Verifier via x402.orthogonal.com is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Verifies the deliverability of a single email address, checking whether it exists and can receive mail.

## Facts

- Endpoint: GET https://x402.orthogonal.com/tomba/v1/email-verifier
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tomba-email-verifier-via-x402-orthogonal-com-3c1950d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ysGNDeJTfe4zMoxo3IQKY

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 tomba-email-verifier-via-x402-orthogonal-com-3c1950d1
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address before I add it to my outreach list?

## When to prefer this

Use this endpoint when you need a quick, per-email deliverability check powered by Tomba's verification infrastructure and are willing to pay $0.01 USDC per call via the x402 payment protocol. Prefer this over bulk validation tools for single-address spot checks, CRM hygiene, or pre-outreach validation in an agent workflow.

## Known failure modes

- Invalid or malformed email address provided — returns an error or invalid status
- Email domain does not exist or has no MX records — flagged as undeliverable
- Catch-all mail servers may cause inconclusive results
- Rate limiting or payment failure may block the request
- Temporary SMTP errors on the recipient server may lead to unknown status

## How this service works

Verify the deliverability of an email address.

## Output

Returns a verification result indicating whether the email address is deliverable, along with details such as validity status, format check outcome, domain/MX record status, and whether the mailbox exists.

## 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": {
      "email": {
       "type": "string",
       "description": "The email address to verify"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tomba-email-verifier-via-x402-orthogonal-com-3c1950d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)