DemiSignal

com.demisignalPublished by demisignal.comOfficial publisherv1.0.0Updated Oct 24, 2026

Check a domain's DMARC, SPF, DKIM, MX, BIMI and MTA-STS records. Generate SPF and DMARC records.

VerifiedStreamable HTTPWeb executableDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

Lets an assistant check a domain's email authentication records (DMARC, SPF, DKIM, MX, BIMI, MTA-STS) and generate SPF and DMARC records.

What you can do
DemiSignal is a remote MCP server for email authentication and deliverability checks. It inspects a domain's DNS-based email records — DMARC, SPF, DKIM, MX, BIMI and MTA-STS — and can generate SPF and DMARC records. No individual tool names are listed in the registry entry.
When to use it
Useful when diagnosing why mail from a domain fails authentication or lands in spam, auditing a domain's email setup, or drafting SPF and DMARC records before publishing them. It suits administrators and developers who need quick record lookups without leaving the assistant.
Requirements
A remote streamable HTTP endpoint at demisignal.com; no package install. The manifest declares no authentication, environment variables or headers, so no credentials appear to be needed. Network access to the endpoint and to the queried domain's DNS records is required.
Before you install
The server queries third-party DNS records for whatever domain you name, so the domains you check are disclosed to the service. Generated SPF and DMARC records should be reviewed before publishing, since a wrong policy can break or weaken mail delivery. No credentials are requested in the manifest.

Installation

In SourceWeft

  1. Open DemiSignal in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.demisignal%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.0.0LatestOct 14, 2026

Score

67% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.