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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.

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Movement

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Rank by placement

#10559of 10,704—24h—7d

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Rank in Developer tools

#835of 866—24h—7d

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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 tools835th of 866 by placement
#PluginPosition7d
833InferGauge#10496—
834Sememe by bld.ai#10544—
835AgentMart Site CheckThis page#10559—
836Mermaid Diagrams#105808,138places down
837Codex Advisor#105961,920places down

All 866 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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