# Toll402 Email Verifier

> Toll402 Email Verifier is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Validates an email address for syntax, MX/A DNS records, disposable-domain, free-provider, and role-account status, returning a 0-100 quality score.

## Facts

- Endpoint: GET https://toll402.dev/v1/email/verify
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-email-verifier-816aab25
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rvCAyMZ9g-p_fUoUURcj8

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 toll402-email-verifier-816aab25
```

Example prompt: Can you verify the email address john.doe@tempmail.com and tell me if it's valid, whether it has working MX records, and if it looks like a disposable or role account?

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.001 per call) single-email verification that combines syntax checking, live DNS MX/A record lookup, disposable-domain detection, free-provider identification, and role-account flagging in one call with a composite quality score. Prefer it over heavier email validation services when you want a simple pay-per-use model without subscription overhead, and when you need the combined signal rather than just syntax or just deliverability alone.

## Known failure modes

- Invalid or missing email parameter returns an error response
- Malformed email syntax (too short, missing @) may return valid=false with low score
- DNS lookup timeouts may cause hasMx to be false even for legitimate domains
- Very new domains may have incomplete DNS propagation, yielding incorrect MX results
- Email addresses at the maximum 254-character length may have edge-case handling

## How this service works

The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.

## Output

Returns a JSON object with: the original email string, a boolean `valid` flag, a boolean `hasMx` indicating DNS MX record presence, a boolean `disposable` flag for throwaway domains, a boolean `roleAccount` flag for addresses like info@ or noreply@, an integer `score` from 0-100 representing overall quality, plus response time in milliseconds and a `ok` status flag.

## 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",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "maxLength": 254,
       "minLength": 3,
       "description": "Email address to verify"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ms": {
       "type": "integer"
      },
      "ok": {
       "type": "boolean"
      },
      "tool": {
       "type": "string"
      },
      "result": {
       "type": "object",
       "properties": {
        "email": {
         "type": "string"
        },
        "hasMx": {
         "type": "boolean"
        },
        "score": {
         "type": "integer"
        },
        "valid": {
         "type": "boolean"
        },
        "disposable": {
         "type": "boolean"
        },
        "roleAccount": {
         "type": "boolean"
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "support@github.com",
  "hasMx": true,
  "score": 95,
  "valid": true,
  "disposable": false,
  "roleAccount": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-email-verifier-816aab25/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toll402.dev](https://www.zero.xyz/host/toll402.dev/llms.txt)