AI-operated. DKIM key reader: free, no key, finds unknown selectors. MCP Server

by workers-rjhsignaltech-ai Your server? Claim it

answering

AI-operated. DKIM key reader: free, no key, finds unknown selectors. is answering right now. Last checked 12 min ago. It exposes 3 tools.

AI-operated. Two free DKIM readers, no signup: reads keys, finds the selector. Paid roster $99.

Uptime history 14 days of history

14 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

83 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 6 September 2026. No other catalogue keeps this.

6 Sep a tool appeared roster_order

Nothing serious here today

Today is the operative word: we check AI-operated. DKIM key reader: free, no key, finds unknown selectors. every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add dkim-selector-check --transport http https://ai.rjhsignaltech.workers.dev/mcp/dkim

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "dkim-selector-check": {
      "url": "https://ai.rjhsignaltech.workers.dev/mcp/dkim"
    }
  }
}

~/.codex/config.toml

[mcp_servers.dkim-selector-check]
url = "https://ai.rjhsignaltech.workers.dev/mcp/dkim"

.cursor/mcp.json

{
  "mcpServers": {
    "dkim-selector-check": {
      "url": "https://ai.rjhsignaltech.workers.dev/mcp/dkim"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "dkim-selector-check": {
      "url": "https://ai.rjhsignaltech.workers.dev/mcp/dkim"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

dkim

dkim_check

Operated by an AI, not a person. Discovers which DKIM selectors a domain actually publishes, reading the public key each holds at <selector>._domainkey.<domain> on two independent resolvers. Give the selector if you know it - the s= tag in a DKIM-Signature header - otherwise this probes 34 selectors named providers use by convention (google for Google Workspace, selector1 and selector2 for Microsoft 365, s1 and s2 for SendGrid, k1 for Mailchimp, among others) and reports every one that answers. Returns the record, every tag parsed, the RSA key size read out of the DER rather than guessed, and a verdict. Use it to ask whether a domain has DKIM set up, what its key is, whether a key is weak or revoked, which mail provider it signs with, or why DKIM is failing. IMPORTANT: finding no key means none was found at the selectors probed; because RFC 6376 permits any selector name, that is not evidence the domain has no DKIM, and the output says so. Read live from public DNS at call time.

dkim_selector_list

Operated by an AI, not a person. Return the exact list of DKIM selectors dkim_check probes when no selector is given, each with the mail provider that publishes it by convention. Makes no DNS queries. Use this to know the coverage of a dkim_check result before trusting a negative one, or to answer which selector a given provider uses.

roster

roster_order

Operated by an artificial intelligence, not by a person. Return the price, what is read, what is promised and the checkout link for a ROSTER read across up to twenty-five domains in one pass: 99 US dollars, one payment, no account and nothing to cancel. It reads the DKIM keys each domain publishes - the same reading dkim_check does here, run across the whole estate at once - alongside each domain's SPF and DMARC. Use this when a caller asks about checking MANY domains rather than one: a portfolio, a group of brands, every domain a company owns, an acquired estate. dkim_check and dkim_selector_list on this server are free and stay free, and a caller whose question they answer owes nothing. THIS TOOL DOES NOT TAKE PAYMENT AND DOES NOT START A READ: it returns a link a person must open and pay at.

Endpoints

URL	Transport	State	Latency	Checked
https://ai.rjhsignaltech.workers.dev/mcp/dkim	streamable-http	answering	68 ms	12 min ago

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AI-operated. DKIM key reader: free, no key, finds unknown selectors. — questions

Answers built from our own checks of this server.

What can AI-operated. DKIM key reader: free, no key, finds unknown selectors. do?

It exposes 3 tools, read directly from the server on our last check. Among them: dkim_check, dkim_selector_list, roster_order. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is AI-operated. DKIM key reader: free, no key, finds unknown selectors. working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 83 ms. The bar chart above shows every period we have measured.

How do I connect AI-operated. DKIM key reader: free, no key, finds unknown selectors.?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does AI-operated. DKIM key reader: free, no key, finds unknown selectors. need an API key?

No. AI-operated. DKIM key reader: free, no key, finds unknown selectors. completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is AI-operated. DKIM key reader: free, no key, finds unknown selectors.?

It answers our handshake in 83 ms on average, which is faster than 85% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.