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MailTester Email Verification

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable.

Connector by mailtester.comOfficial · Domain verified by the MCP Registry

IndexedLicense unknownRemote (HTTP)
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Install

Works with Claude Code, VS Code, Cursor, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install connector/mailtester-com-email-verification

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Remote endpoint

  • https://app.mailtester.com/mcp Remote (HTTP)

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About

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

Reviews

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No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
9 read · 0 write · 0 deleteRead-only
Secrets
1 (API keys, tokens or passwords)
Install scripts
Nothing to install (hosted)
Runs as
Hosted (remote endpoint)

Tools by what they do 9

From the running server's own tool list (tools/list) on Oct 25, 2026.

Read 9 · Look things up without changing anything.

  • estimate_cost
  • explain_result
  • get_api_key
  • get_batch_status
  • get_credit_balance
  • get_list
  • list_lists
  • verify_batch
  • verify_email

Secrets and settings it asks for

Secrets: values you paste in that let it act as you.

  • Authorization

Network hosts it talks to 1

  • app.mailtester.com · found in remote endpoint, install command

Tools (9)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • estimate_cost

    Estimate the credit cost of a verification before running it, and whether the user can afford it. Provide either a count of emails, a list_id to re-verify, or an operation ('single'/'finder'). Always quote this before proposing anything billable.

  • explain_result

    Explain what a verification status or reason means in plain English, with a send recommendation. Covers valid, invalid, catch-all/accept-all, unknown, greylisted, disposable, role, free, spam-trap, abuse, do-not-mail, no-mx, disabled, and network. Use when a user asks what a result means.

  • get_api_key

    Get your own free API key for this server (no account needed; 25 email verifications per day). Optional: the verification tools already work without a key on a shared trial. Returns the key once — reconnect with 'Authorization: Bearer <api_key>' for your own quota and the list tools.

  • get_batch_status

    Get the progress and status of a bulk verification list/job by id.

  • get_credit_balance

    Get the current credit balance and a short usage summary for the account.

  • get_list

    Get the details of a single bulk verification list by its id.

  • list_lists

    List the user's bulk verification lists/jobs, most recent first.

  • verify_batch

    Verify a batch of email addresses (up to 25 per call with an agent key). Returns per-email verdicts and saves a list. Costs 1 credit per email.

  • verify_email

    Verify the deliverability of a single email address. Returns a verdict (valid, invalid, risky, unknown). Costs 1 credit.

Signals

Stars
0
Forks
0
Open issues
1
Last commit
Oct 8, 2026 (20 days ago)
Last release
Oct 8, 2026 (20 days ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name
com.mailtester/email-verification
Version
1.0.1
Auth
Bearer token
License
License unknown
Repository
github.com/mailtester-com/mailtester-mcp
Website
app.mailtester.com/agent-gateway
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql
Cite this page

MailTester Email Verification MCP server. Agent Mart. https://agentmart.dev/connectors/mailtester-com-email-verification (last updated 2026-10-24)