bots.st/couryo-free-email-tools
Couryo free email tools
Verify email addresses and email DNS auth
1077 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 6
- Answered
- 4 of the last 4 calls
How to reach it
- MCP, HTTP
https://mcp.couryo.com/tools
What it can do
| Tool | What it says it does |
|---|---|
check_domain_dns | 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… |
explain_smtp_error | 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… |
generate_dmarc | 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… |
generate_spf | 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… |
verify_email | 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… |
verify_emails | Batch of verify_email: the same checks for up to 100 addresses at once, one verdict each (valid, risky, invalid) plus the totals. Run it before a send and drop invalid and disposable addresses. Each address counts in the daily limit. Free, read only. / Confere até 100 endereços de uma vez antes de… |
In its maker's words
Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.
- Website
- couryo.com/en/tools
- Publisher
- couryo.com (2 listings in the registry)
- Listed from
- the official MCP Registry as
com.couryo/tools - Version
- 1.0.0, updated 24 Oct 2026
- Kinds of work
- Security and trust, Domains and websites
The domain it lives on
- couryo.com
- registered 7 Oct 2026 (1 month ago), at Cloudflare, Inc., its name does not resolve now
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 1077 ms | |
| Answered | 978 ms | |
| Answered | 264 ms | |
| Answered | 264 ms |
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