Stamp

com.clawhard/stampVersion 1.0.0

Check a domain's SPF, DKIM, DMARC and MX from live DNS, the Gmail/Yahoo rules, and fix records.

Status

Responds115 msNov 14, 2026, 13:51 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:51 UTC
Latency: 115 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://stamp.clawhard.com/mcpResponds115 msNov 14, 2026, 13:51 UTC

No sign-in

Claude Code

claude mcp add --transport http stamp https://stamp.clawhard.com/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: stamp
Remote MCP server URL: https://stamp.clawhard.com/mcp

Cursor

{
  "mcpServers": {
    "stamp": {
      "url": "https://stamp.clawhard.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"stamp","type":"http","url":"https://stamp.clawhard.com/mcp"}'

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Tools

2 tools

Tools of Stamp
	Description		Read-only	Idempotent	Open world
`stamp_check_dns_record`Use when you or the user are about to publish or edit an SPF, DMARC or DKIM TXT record, for example after writing a new SPF record that adds a sending service, or when the user pastes a record and asks "is this right?". Detects the record type. SPF: syntax per RFC 7208, every include and redirect followed live in DNS and counted against the 10-lookup limit, void lookups, loops, the final all; returns a lookup tree. DMARC: RFC 7489 tags and values (p, sp, pct, rua/ruf, adkim/aspf, fo). DKIM: key type and RSA key size read from the key, revoked (empty p=) or truncated keys. Returns valid true/false, errors, warnings and where to publish it. Pass domain so a/mx terms without a value can be resolved.	Use when you or the user are about to publish or edit an SPF, DMARC or DKIM TXT record, for example after writing a new SPF record that adds a sending service, or when the user pastes a record and asks "is this right?". Detects the record type. SPF: syntax per RFC 7208, every include and redirect followed live in DNS and counted against the 10-lookup limit, void lookups, loops, the final all; returns a lookup tree. DMARC: RFC 7489 tags and values (p, sp, pct, rua/ruf, adkim/aspf, fo). DKIM: key type and RSA key size read from the key, revoked (empty p=) or truncated keys. Returns valid true/false, errors, warnings and where to publish it. Pass domain so a/mx terms without a value can be resolved.	No	Yes	Yes	Yes
`stamp_check_email_domain`Use when the user asks why their email goes to spam, whether their domain is set up to send email, or before they launch a newsletter, cold outreach, transactional email or a new sending service, e.g. "why are my emails going to spam?", "is my SPF/DKIM/DMARC right?", "do I meet Gmail and Yahoo's sender requirements?" or "I added SendGrid, did I break SPF?". Reads public DNS (DNS-over-HTTPS) and checks: SPF (exactly one record, every include followed and DNS lookups counted per RFC 7208 against the limit of 10, void lookups, loops, +all/?all, ptr), DMARC (RFC 7489 syntax, policy, pct, alignment, inherited from the parent domain, and whether an external report address authorized it), DKIM (17 common selectors plus any you pass; key type and RSA key size read from the key, revoked or broken keys), and MX (provider, null MX). Returns a grade A-F, a verdict, each check with status pass/warn/fail/info, whether the Gmail, Yahoo and Outlook.com sender rules are met, and copy-ready DNS records to fix problems (e.g. one merged SPF record, a starter DMARC record). DNS cannot list DKIM selectors, so when none of the common selectors is found the result says so and a known selector (the s= value in a DKIM-Signature header) can be passed in. Accepts a domain, an email address or a URL. Results are cached for 5 minutes; pass fresh=true right after the user changes DNS.	Use when the user asks why their email goes to spam, whether their domain is set up to send email, or before they launch a newsletter, cold outreach, transactional email or a new sending service, e.g. "why are my emails going to spam?", "is my SPF/DKIM/DMARC right?", "do I meet Gmail and Yahoo's sender requirements?" or "I added SendGrid, did I break SPF?". Reads public DNS (DNS-over-HTTPS) and checks: SPF (exactly one record, every include followed and DNS lookups counted per RFC 7208 against the limit of 10, void lookups, loops, +all/?all, ptr), DMARC (RFC 7489 syntax, policy, pct, alignment, inherited from the parent domain, and whether an external report address authorized it), DKIM (17 common selectors plus any you pass; key type and RSA key size read from the key, revoked or broken keys), and MX (provider, null MX). Returns a grade A-F, a verdict, each check with status pass/warn/fail/info, whether the Gmail, Yahoo and Outlook.com sender rules are met, and copy-ready DNS records to fix problems (e.g. one merged SPF record, a starter DMARC record). DNS cannot list DKIM selectors, so when none of the common selectors is found the result says so and a known selector (the s= value in a DKIM-Signature header) can be passed in. Accepts a domain, an email address or a URL. Results are cached for 5 minutes; pass fresh=true right after the user changes DNS.	No	Yes	Yes	Yes

Details

Registry status: Active
Published: Nov 5, 2026
Updated: Nov 5, 2026
Website: https://stamp.clawhard.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): SecuritySuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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