MCP server

Couryo free email tools Official

com.couryo/tools

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

couryo.com (verified by the MCP Registry)

Status

Working at last check

Tools

5

Token cost

About 1,110 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http tools https://mcp.couryo.com/tools

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.tools]
url = "https://mcp.couryo.com/tools"

Gemini CLI

{"mcpServers":{"tools":{"httpUrl":"https://mcp.couryo.com/tools"}}}

Cursor

{"mcpServers":{"tools":{"url":"https://mcp.couryo.com/tools"}}}

VS Code

{"servers":{"tools":{"type":"http","url":"https://mcp.couryo.com/tools"}}}

Antigravity

agy mcp add tools https://mcp.couryo.com/tools

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"tools","server_url":"https://mcp.couryo.com/tools","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"tools","server_url":"https://mcp.couryo.com/tools"}

Tools

• check_domain_dns ~237 tokens
  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 recor
• explain_smtp_error ~173 tokens
  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 lingu
• generate_dmarc ~234 tokens
  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 re
• generate_spf ~267 tokens
  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.
• verify_email ~199 tokens
  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 ne

Browse

• IPv4 tools
• Domains and DNS
• Email

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