INDIVIDUAL MCP TOOL

check_domain

Look up a domain's live DNS and grade its email authentication: DMARC, SPF, DKIM (common selectors), MX, BIMI and MTA-STS.

demisignal.comnone authenticationAvailability not checked

LIVE ENDPOINT

https://demisignal.com/mcp?utm_source=mcp-registry

No auth detected

Connect to this endpoint to inspect the live schema for check_domain and invoke it with your own arguments.

{}

Potential side effects detected · medium confidence · heuristic, not a guarantee.

CONNECT WITH APPROVAL

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.demisignal]
url = "https://demisignal.com/mcp?utm_source=mcp-registry"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "demisignal": {
      "type": "http",
      "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: demisignal
Remote MCP URL: https://demisignal.com/mcp?utm_source=mcp-registry

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "demisignal": {
      "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "demisignal": {
      "type": "http",
      "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "demisignal",
  "transport": "streamable-http",
  "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

generate_spf_record — Build an SPF TXT record from the services and servers that send email for a domain, with an estimate of the DNS lookups it uses against SPF's limit of 10.
generate_dmarc_record — Build a DMARC TXT record and the host to publish it at, from a policy and the addresses that should receive aggregate reports.