MCP · paid call · 0.80 USDC

Check email syntax and MX records before an agent uses an address.

Email Validator accepts a batch of email addresses, rejects malformed formats, and can check whether each valid domain publishes MX records. It does not send email and does not claim that a specific mailbox exists.

When this is useful

• An agent or workflow receives email addresses from another system and needs a fast validity check before using them.
• You want to separate obvious syntax failures from domains that do not publish MX records.
• You need batch results rather than manually checking addresses one at a time.

What the tool returns

• The original email address.
• Whether its format is valid.
• The parsed domain.
• Whether MX records were found when MX checking is enabled.
• An explicit error when the input cannot be validated.

What it does not prove

• It does not send a verification email.
• It does not prove that a mailbox exists or that mail will be delivered.
• It does not correct typos or classify disposable addresses.
• MX lookup necessarily queries DNS for the supplied domain.

Access and price

The currently configured paid route is 0.80 USDC per mainnet call through the existing x402 payment path. The public MCP listing is already available on Smithery. No revenue or usage claim is implied by the listing being public.