# NetIntel Email Verification API

> NetIntel Email Verification API is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Verifies an email address for deliverability, format validity, MX records, disposability, and risk flags via a single GET call

## Facts

- Endpoint: GET https://netintel-production-440c.up.railway.app/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/netintel-email-verification-api-d9a33fbc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-dSydJHOxoDbF-2AMQFjI

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 netintel-email-verification-api-d9a33fbc
```

Example prompt: Can you check whether user@github.com is a real, deliverable email address — tell me if it's safe to send to, whether it's disposable or role-based, and whether the domain has valid MX records?

## When to prefer this

Choose this endpoint when you need a fast, per-call, no-signup email validation that combines format checking, MX record lookup, disposable/role-based detection, and deliverability assessment in a single call. Ideal for agents that need to screen emails at registration, before sending campaigns, or during fraud checks, especially when avoiding subscription-based email validation services. The $0.001 USDC micropayment model means you only pay for successful, valid calls.

## Known failure modes

- Invalid or malformed email format returns an undeliverable result with format_valid: false
- Non-existent domain with no MX records returns mx_found: false and undeliverable result
- Upstream DNS or SMTP lookup failures may return risky result with smtp_checked: false
- Missing required email query parameter returns an input validation error (not billed)
- Rate or network issues at the server level return a server error (not billed)

## How this service works

Network intelligence API — 138 endpoints, all pay-per-call via x402 micropayments (USDC on Base or Solana mainnet).

NetIntel is agent fair-trade aligned: transparent per-call pricing in USDC on Base or Solana via x402, no API keys or signup, and automatic no-charge on server errors, upstream failures, and input-validation rejections — failed calls are never billed across NetIntel's network, domain, and data-intelligence endpoints.

## Output

A JSON object containing the normalized email and domain, a top-level result string (deliverable | risky | undeliverable), boolean flags for format_valid, deliverable, mx_found, disposable, role_based, free_provider, safe_to_send, smtp_checked, an array of MX record hostnames, an array of risk_flags describing specific issues, and a human-readable reason string.

## 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",
       "description": "Email address to verify, 3-320 chars. Aliases: address, email_address, emailAddress, e, q, to"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "email": {
       "type": "string"
      },
      "domain": {
       "type": "string"
      },
      "reason": {
       "type": "string"
      },
      "result": {
       "type": "string",
       "description": "deliverable | risky | undeliverable"
      },
      "mx_found": {
       "type": "boolean"
      },
      "disposable": {
       "type": "boolean"
      },
      "mx_records": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "risk_flags": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "role_based": {
       "type": "boolean"
      },
      "deliverable": {
       "type": "boolean"
      },
      "format_valid": {
       "type": "boolean"
      },
      "safe_to_send": {
       "type": "boolean"
      },
      "smtp_checked": {
       "type": "boolean"
      },
      "free_provider": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "user@github.com",
  "domain": "github.com",
  "reason": "ok",
  "result": "deliverable",
  "mx_found": true,
  "disposable": false,
  "mx_records": [
   "aspmx.l.google.com"
  ],
  "risk_flags": [],
  "role_based": false,
  "deliverable": true,
  "format_valid": true,
  "safe_to_send": true,
  "smtp_checked": false,
  "free_provider": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-email-verification-api-d9a33fbc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel-production-440c.up.railway.app](https://www.zero.xyz/host/netintel-production-440c.up.railway.app/llms.txt)