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AgentMart Site Check

ChatGPT plugin

Check a website's public setup

View in ChatGPT directory

AgentMart Site Check reads the public setup of a website, the way any visitor or AI agent sees it from the outside. Give it a domain such as example.com. It checks HTTPS and security headers, certificate dates, email sender records (SPF and DMARC), whether privacy, terms and contact pages can be found, and files for AI agents (llms.txt, robots.txt and MCP). Each item comes back as pass, warn, fail or not checked, with plain steps to fix it.

How it reads: at most 24 requests to the site per check, one of them over plain http to see whether the site moves visitors to HTTPS, plus public DNS questions. If the site names an MCP server, the check sends it the standard MCP opening messages, asks for its list of tools and ends the session. It follows the site's robots.txt rules for AgentMart-Check. It never logs in, fills in forms or changes anything on the site.

What it returns: our own fixed wording and numbers. No text from the checked site is copied into a result. A result is kept for 7 days and can be shown again by its check_id. A repeat for the same domain within 15 minutes gives the same result, unless you ask for a fresh check.

Limits: a result describes that moment only. It is not a security audit, and it says nothing about the company's servers, code, staff or how it handles data.

No account and no sign-in. Site owners can stop checks of their domain with a DNS TXT record agentmart-check=no on _agentmart-check.<their domain>, or by writing to us.

Made by Ciphyr Tech OÜ (Estonia), the company that runs AgentMart.

Featured
No

not on the featured shelf

Movement

From our daily snapshots over the last 30 days.

Rank by placement

#11184of 11,360359places down24h—7d
#10,497#10,685#10,873#11,061Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

Rank in Developer tools

#869of 90020places down24h—7d
#832#843#854#865Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

In its category

How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.

Developer tools869th of 900 by placement
#PluginPosition7d
867TPC Benchmarks#11127—
868GetLinkFast SEO#11153—
869AgentMart Site CheckThis page#11184—
870Matt Skills Curated#112509,941places down
871Skillquiver#112548,816places down

All 900 Developer tools plugins

Also on other marketplaces

Example prompts

  • “Check example.com with AgentMart Site Check.”
  • “Does my domain have SPF and DMARC records?”
  • “When does the HTTPS certificate of my website expire?”
Categories
Made by
Ciphyr Tech OÜ · Website
Sign-in
On Install
Capabilities
Check HTTPS, headers and certificate dates, Check SPF and DMARC records, Find privacy, terms and contact pages, Check llms.txt, robots.txt and MCP, Show an earlier result by its check_id
Availability
Available
Version
1.0.1
Keywords
website-check, security-headers, https, spf, dmarc, llms-txt, mcp
Created
October 30, 2026
More info
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