# Email Address Validator

> Email Address Validator is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Validates an email address by checking syntax, MX records, SPF/DMARC policies, disposability, domain resolution, and role-account detection

## Facts

- Endpoint: POST https://flat-rate-llm.kikoribera03.workers.dev/v1/red/email-check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-address-validator-74562901
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kAtQqLuBD1S_Jh-HBnHSj

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-address-validator-74562901 -d '<json body>'
```

Example prompt: Can you check whether john.doe@tempmail.com is a valid, deliverable email — specifically whether the domain resolves, has MX records, passes SPF/DMARC, and whether it looks like a disposable or role address?

## When to prefer this

Use this endpoint when you need a comprehensive, multi-signal email validation in a single flat-rate call — covering syntax, DNS/MX resolution, SPF, DMARC, disposability, and role-account detection — without managing API keys or per-character metering. Prefer it over basic regex checks when deliverability and lead quality matter, or over heavier email verification SaaS when you want predictable $0.005 per-call pricing with no subscription.

## Known failure modes

- Missing or malformed email field returns a 400-level error
- DNS lookup timeouts for obscure or slow domains may cause delays or partial results
- Disposable email database may not cover newly created throwaway domains
- Valid-looking but non-existent addresses may pass syntax checks but fail MX resolution
- Payment failure or insufficient USDC balance prevents the call from completing

## How this service works

60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.

## Output

Returns a JSON object with: the original email and parsed domain, a boolean syntaxValid, booleans hasMx and domainResolves, the raw SPF record string, dmarcPolicy string, a disposable boolean indicating throwaway services, a roleAccount boolean for generic addresses like info@ or admin@, an array of MX records with priority and exchange, an array of reasons explaining any issues, and a final verdict string summarizing deliverability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "email"
 ],
 "properties": {
  "email": {
   "type": "string",
   "description": "The address to check, e.g. someone@example.com."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mx": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "spf": {
   "type": "string"
  },
  "email": {
   "type": "string"
  },
  "hasMx": {
   "type": "boolean"
  },
  "domain": {
   "type": "string"
  },
  "reasons": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "verdict": {
   "type": "string"
  },
  "disposable": {
   "type": "boolean"
  },
  "dmarcPolicy": {
   "type": "string"
  },
  "roleAccount": {
   "type": "boolean"
  },
  "syntaxValid": {
   "type": "boolean"
  },
  "domainResolves": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-address-validator-74562901/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from flat-rate-llm.kikoribera03.workers.dev](https://www.zero.xyz/host/flat-rate-llm.kikoribera03.workers.dev/llms.txt)