# Mailvett by CyberMax

> Free email validation API and MCP server: syntax, MX, disposable, role, free-provider and typo checks with a verdict, reasons and a 0-100 score. No SMTP probing.

> Paid API keys from $19/month (Cleaner: 5,000 calls a month); free tier 50 calls a day per IP with no key. Buy: https://mailvett.cybermaxtools.com/buy/cleaner?s=lead · all plans: https://mailvett.cybermaxtools.com/docs#pricing

Paste addresses and get a clear verdict for each: syntax, domain and mail server (MX), mail provider, disposable, role (info@, sales@), free provider and likely typos (gmial.com → gmail.com), plus domain age, SPF and DMARC.

## API (free tier without a key; paid API keys for more)
- [/api/validate](https://mailvett.cybermaxtools.com/api/validate?email=jane.doe%40gmial.com,info%40stripe.com): Validate up to 10 email addresses
- GET for simple calls, POST a JSON body for lists. Same field names as the bulk version's dataset records.
- OpenAPI 3.1: https://mailvett.cybermaxtools.com/openapi.json

## MCP (remote, streamable HTTP, no auth)
- Endpoint: https://mailvett.cybermaxtools.com/mcp
- `validate_emails`: Check up to 10 email addresses: syntax, whether the domain exists and has mail servers (MX), mail provider, disposable, role account (info@, sales@), free provider, likely typo with a suggested fix, domain age, SPF and DMARC. Returns verdict (deliverable_likely/risky/undeliverable/invalid), score 0-100 and reason codes per address. Does not verify that the mailbox itself exists.

## Limits
- 20 calls per minute per IP address.
- Up to 10 emails per call.
- Domain age and parked-site checks run in full for up to 5 different domains per call.
- Mailboxes are never probed (no SMTP), so the top score is 90.
- Free, no key.

## More
- Health: https://mailvett.cybermaxtools.com/health
- All CyberMax tools: https://cybermax-tools-cybermax.static.hf.space/
- A bulk and scheduled version is coming to the Apify Store.

## Pricing
- Free: 50 calls a day per IP, 20/min, no key.
- Cleaner: $19/month, 5,000 calls a month, 60/min. Buy: https://mailvett.cybermaxtools.com/buy/cleaner?s=llms
- Growth: $49/month, 20,000 calls a month, 120/min. Buy: https://mailvett.cybermaxtools.com/buy/growth?s=llms
- Agency: $99/month, 60,000 calls a month, 240/min. Buy: https://mailvett.cybermaxtools.com/buy/agency?s=llms
- Pay as you go: $5, 1,000 calls (one-time pack, no expiry), 60/min. Buy: https://mailvett.cybermaxtools.com/buy/payg?s=llms
- Cleaner yearly: $190/year, 5,000 calls a month, 60/min. Buy: https://mailvett.cybermaxtools.com/buy/cleaner-yearly?s=llms
- Growth yearly: $490/year, 20,000 calls a month, 120/min. Buy: https://mailvett.cybermaxtools.com/buy/growth-yearly?s=llms
- Agency yearly: $990/year, 60,000 calls a month, 240/min. Buy: https://mailvett.cybermaxtools.com/buy/agency-yearly?s=llms
- Using several CyberMax APIs? CyberMax API All-Access: one key for all 10 APIs (this one included, 5,000 calls a month here) for $119/month. https://api-all-access.cybermaxtools.com/
- Use the key as `x-api-key: KEY` or `Authorization: Bearer KEY` (MCP too). Usage: https://mailvett.cybermaxtools.com/key. Machine-readable: https://mailvett.cybermaxtools.com/pricing.json

## Pay per call (x402, USDC on Base): for AI agents, no key, no account
- $0.006 per call, paid in USDC on Base (x402 "exact" scheme, v1 and v2).
- https://mailvett.cybermaxtools.com/x402/api/validate: same as /api/validate, always pay-per-call (an unpaid call returns HTTP 402 with the payment requirements).
- Plain endpoints keep the free tier and API keys; with no key, they also answer 402 (instead of 429) once the free daily quota is used.
- Send the signed payment as X-PAYMENT (v1) or PAYMENT-SIGNATURE (v2); the receipt comes back in X-PAYMENT-RESPONSE / PAYMENT-RESPONSE. Failed calls are not charged.