# MailValid (mailvalid.io)

Verifies email addresses through syntax, domain MX and mailbox SMTP checks, flagging disposable, role-based and catch-all addresses.

- Atlas card: https://inite.ai/en/atlas/mailvalid.io
- Site: https://mailvalid.io
- For: Teams that send email, from list cleaning and cold outreach to signup verification
- Categories: security
- Use not measured/100 · alive 100/100

## Used for

- strip bad addresses from a list before a campaign
- verify candidate lists before recruiting outreach
- block fake and disposable signups at registration

## Price

- from 29 USD/month, free plan (read 2026-10-19 on https://mailvalid.io/pricing)

## For developers

- API docs: https://mailvalid.io/dashboard/api-keys
- MCP server: io.mailvalid/email-verifier (namespace; open on 2026-10-19, 6 tools)
- Read 2026-10-19

## MCP server, measured daily

Server: https://mailvalid.io/mcp/, checked every day since 2026-10-19 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 332 ms
- Sign-in: none
- Context its tool definitions take: about 610 tokens (6 tools)
- Tool definitions: B, 86/100
- Failing "params_described": 5 of 6 tools
- Warning "open_writes": cancel_bulk_job
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: gdpr
- Read 2026-10-19

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Source: INITE Atlas, https://inite.ai/en/atlas/mailvalid.io. JSON: https://inite.ai/api/atlas/mailvalid.io. MCP: https://inite.ai/api/mcp (atlas_lookup).