INDIVIDUAL MCP TOOL

check_mta_sts

Validate a domain's _mta-sts DNS record and its published policy file: mode, MX patterns, max_age and TLS-RPT.

warminboxes.comnone authenticationAvailability not checked

LIVE ENDPOINT

https://warminboxes.com/mcp

No auth detected

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

{}

Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

CONNECT WITH APPROVAL

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

Codex

~/.codex/config.toml

[mcp_servers.warminboxes-deliverability-tools]
url = "https://warminboxes.com/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "warminboxes-deliverability-tools": {
      "type": "http",
      "url": "https://warminboxes.com/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: warminboxes-deliverability-tools
Remote MCP URL: https://warminboxes.com/mcp

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": {
    "warminboxes-deliverability-tools": {
      "url": "https://warminboxes.com/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "warminboxes-deliverability-tools": {
      "type": "http",
      "url": "https://warminboxes.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "warminboxes-deliverability-tools",
  "transport": "streamable-http",
  "url": "https://warminboxes.com/mcp"
}

MCP Inspector

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

check_deliverability — Grade a domain A-F for cold email readiness.
check_spf — Look up a domain's SPF record and validate it, including the recursive DNS lookup count that silently breaks SPF past 10.
check_dkim — Find and validate a domain's DKIM signing key, including key strength.
check_dmarc — Look up and parse a domain's DMARC record: policy, subdomain policy, percentage, alignment and reporting tags, each explained.
check_bimi — Validate a domain's BIMI record, the logo SVG, the VMC, and the DMARC enforcement level Gmail requires before it will show a brand logo.
check_dns — Query any DNS record type for a domain: MX, TXT, A, AAAA, CNAME, NS, SOA, CAA.
check_blacklist — Check a domain or IP against 20+ major email blacklists (Spamhaus, Barracuda, SORBS and others) and report which list it appears on.
check_surbl — Check domains against the SURBL URI blacklist in bulk.