Couryo free email tools MCP server

• check_domain_dnsFree

  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_errorFree

  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_dmarcFree

  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_spfFree

  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_emailwrite actionFree

  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.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 528ms20/20
• Tool poisoning5 tool descriptions checked15/15
• Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
• Maintenanceno repository listed3/15
• Maintainer identityendpoint served from the registry-verified namespace domain8/10

Safety score

65/100

higher than 20% of 916 Email servers

Tools

5

the typical Email server has 7

Tools that change things

20%

typical: 25%. Fewer write tools means less an agent can break

Uptime

100%

of our recent checks; the typical remote Email server answers 100%

Response time

445 ms

faster than 33% of 609 Email servers

Couryo free email tools: common questions

Is Couryo free email tools MCP server safe?

With care: it is graded C, so read the findings first (65/100). Read the Couryo free email tools safety report

How do I install Couryo free email tools?

It runs remotely at mcp.couryo.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Couryo free email tools need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Couryo free email tools maintained?

The latest release is v1.0.0.

Is Couryo free email tools up?

100% of our last 28 checks got an answer. We check remote servers about four times a day.

What can I use instead of Couryo free email tools?

Servers from other publishers that do the same job: e2a — email for AI agents MCP server, e2a — email for AI agents MCP server and ContrastAPI MCP server.

How does Couryo free email tools compare with other Email MCP servers?

safety score 65/100 (higher than 20% of 916 Email servers); tools 5 (the typical Email server has 7); tools that change things 20% (typical: 25%. Fewer write tools means less an agent can break). Full comparison.