# Email Verification API – Deliverability & Flags

> Email Verification API – Deliverability & Flags is a paid API for AI agents from api.webbersites.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Verifies an email address for deliverability via syntax check, MX lookup, disposable-domain detection, role-account and free-provider flags, plus-tag normalization, and a final verdict.

## Facts

- Endpoint: GET https://api.webbersites.com/api/email/verify
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-verification-api-deliverability-flags-8f2155b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__AzYyAL95lY8H-x5dl0jn

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 email-verification-api-deliverability-flags-8f2155b7
```

Example prompt: Can you check whether john.doe+promo@tempmail.com is a real, deliverable email — tell me if it's a disposable address, a role account, or a free provider, and give me the normalized version?

## When to prefer this

Use this endpoint when you need a no-signup, self-contained email validation check that combines syntax, MX lookup, disposable detection, role-account flagging, free-provider detection, and plus-tag normalization in a single call — especially for pre-CRM ingestion, outreach list cleaning, or real-time form validation without integrating a heavyweight third-party email validation service.

## Known failure modes

- Missing email query parameter — returns error indicating required field
- Invalid or malformed email string — syntax check fails with details
- Domain has no MX records and no implicit-MX fallback — verdict returns undeliverable
- Rate limit or quota exceeded — returns 402 or 429 status
- Network timeout reaching the API — no response

## How this service works

Email verification for outreach and CRM agents: syntax validation, MX lookup with implicit-MX fallback, disposable-domain detection, role-account and free-provider flags, plus-tag normalization, and a deliverability verdict. No signup, no external services.

## Output

Returns the original email, normalized form (plus-tag stripped), syntax validity, MX/domain check details, boolean flags for disposable domain, role account, and free provider, plus an overall deliverability verdict 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"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "email": {
       "type": "string"
      },
      "flags": {
       "type": "object"
      },
      "syntax": {
       "type": "object"
      },
      "verdict": {
       "type": "string"
      },
      "normalized": {
       "type": "string"
      },
      "domain_check": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "jane.doe+news@gmail.com",
  "flags": {
   "plus_tag": true,
   "disposable": false,
   "role_account": false,
   "free_provider": true
  },
  "syntax": {
   "valid": true
  },
  "verdict": "deliverable_domain",
  "normalized": "janedoe@gmail.com",
  "domain_check": {
   "mx_found": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-verification-api-deliverability-flags-8f2155b7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.webbersites.com](https://www.zero.xyz/host/api.webbersites.com/llms.txt)