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Couryo free email tools

Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.

Connector by couryo.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/couryo-com-tools

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://mcp.couryo.com/tools Remote (HTTP)

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About

Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.

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
5 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
Nothing to install (hosted)
Runs as
Hosted (remote endpoint)

Tools by what they do 5

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

Read 5 · Look things up without changing anything.

  • check_domain_dns
  • explain_smtp_error
  • generate_dmarc
  • generate_spf
  • verify_email

Network hosts it talks to 1

  • mcp.couryo.com · found in remote endpoint, install command

Tools (5)

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

  • check_domain_dnsCheck a domain's email DNS / Verificar SPF, DKIM e DMARCread-only

    Checks the email setup of any domain: SPF (one record, ending, the 10 DNS lookup limit), DKIM on the common selectors (or dkim_selector), DMARC policy and reports, MX and mailbox provider, MTA-STS, TLS-RPT and BIMI. Answers a 0 to 100 score, a grade, the fix for each problem in plain words and records ready to copy. Free, read only. / Confere SPF, DKIM, DMARC e MX de qualquer domínio, com nota e a correção de cada problema.

  • explain_smtp_errorExplain an SMTP error / Explicar erro de e-mailread-only

    Explains a bounce or SMTP error text ("550 5.7.515 Access denied", "452 4.2.2 mailbox full") in plain words: hard (the address does not work), soft (temporary) or policy (a provider rule, not the address), the provider and the next step. Free, read only. / Explica uma devolução ou erro SMTP em linguagem simples, com o próximo passo.

  • generate_dmarcGenerate a DMARC record / Gerar registro DMARCread-only

    Builds one DMARC record (TXT at _dmarc.<domain>). Start with policy none and a report address (rua), read the reports, then move to quarantine and reject once every legitimate sender passes SPF or DKIM aligned. Free, no network. / Monta o registro DMARC; comece com p=none e suba para quarantine e reject.

  • generate_spfGenerate an SPF record / Gerar registro SPFread-only

    Builds one SPF record (TXT at the domain) from the services that send for it: includes, IPv4 and IPv6, mx and a. Starts with ~all (softfail), the safe choice; use policy fail (-all) once every sender is listed. Remember the limit of 10 DNS lookups (each include costs at least one). Free, no network. / Monta o registro SPF a partir dos serviços que enviam pelo domínio.

  • verify_emailVerify an email address / Verificar e-mailread-only

    Checks one email address without sending anything: format, typo in big providers ("gmail.com.br" → "gmail.com", "hotmial.com"), disposable inbox, shared mailbox (contato@, sales@) and whether the domain receives email (MX). Verdict valid, risky or invalid, with did_you_mean. The mailbox itself is never probed. Free, read only. / Confere um endereço sem enviar nada: formato, erro de digitação, e-mail temporário, caixa compartilhada e se o domínio recebe e-mail.

Signals

Last release
Oct 24, 2026 (5 days ago)

Details

Registry name
com.couryo/tools
Version
1.0.0
Auth
Auth not stated
License
License unknown
Website
couryo.com/en/tools
First seen
Oct 24, 2026
Last checked
Oct 25, 2026
Source
Official MCP Registry

More from couryo.com

Cite this page

Couryo free email tools MCP server. Agent Mart. https://agentmart.dev/connectors/couryo-com-tools (last updated 2026-10-25)