# ContactLint (contactlint.com)

Checks email addresses and phone numbers before saving them, via an HTTP API, testing syntax, DNS MX records, disposable domains and typos.

- Atlas card: https://inite.ai/en/atlas/contactlint.com
- Site: https://contactlint.com
- For: developers and product teams validating signup forms and contacts before AI agents write to a CRM
- Categories: voice
- Use 0/100 · alive 100/100

## Used for

- flag mistyped email domains during signup
- check contacts before an agent saves them to a CRM
- clean a CSV contact list before sending

## Price

- from 9 USD/one-time, free plan (read 2026-10-28 on https://contactlint.com/#pricing)

## For developers

- OpenAPI: https://contactlint.com/openapi.json (8 paths)
- MCP server: com.contactlint/contactlint (namespace; open on 2026-10-28, 3 tools)
- Read 2026-10-28

## MCP server, measured daily

Server: https://contactlint.com/mcp, checked every day since 2026-10-28 (6 checks).

- Answered: measuring, 6 daily checks so far
- Median first answer: 84 ms
- Sign-in: none
- Context its tool definitions take: about 300 tokens (3 tools)
- Tool definitions: C, 67/100
- Failing "params_described": 3 of 3 tools
- Failing "annotations": 3 of 3 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: gdpr, ccpa
- Read 2026-10-28

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