InboxGuards Email Check

com.inboxguardstest.api/emailVersion 1.2.0

Check emails before you send, and get a $1 SPF/DKIM/DMARC fix plan for your domain. Pay per call.

Status

Responds405 msNov 14, 2026, 14:01 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:01 UTC
Latency: 405 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://api.inboxguardstest.com/mcpResponds405 msNov 14, 2026, 14:01 UTC

No sign-in

Claude Code

claude mcp add --transport http email https://api.inboxguardstest.com/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: email
Remote MCP server URL: https://api.inboxguardstest.com/mcp

Cursor

{
  "mcpServers": {
    "email": {
      "url": "https://api.inboxguardstest.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"email","type":"http","url":"https://api.inboxguardstest.com/mcp"}'

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Tools

4 tools

Tools of InboxGuards Email Check
	Description		Read-only	Idempotent	Open world
`check_email_address`Check one email address before you send to it: syntax, whether the domain accepts mail (MX, null MX or implicit A record), a disposable-domain flag (public CC0 list of about 9,900 domains), a role-account flag (info@, support@, noreply@...) and a free-provider flag. Returns a verdict of ok, risky or undeliverable with plain reasons. Use validate_email first if you only need syntax. No SMTP probe is made and no mail is sent, so it cannot confirm the mailbox exists. The address is not stored or logged. Read-only; one live DNS lookup via Cloudflare DoH. Costs $0.005 USDC per call via x402 (payment goes in _meta["x402/payment"]); invalid input or a DNS failure returns an error and is not charged.	Check one email address before you send to it: syntax, whether the domain accepts mail (MX, null MX or implicit A record), a disposable-domain flag (public CC0 list of about 9,900 domains), a role-account flag (info@, support@, noreply@...) and a free-provider flag. Returns a verdict of ok, risky or undeliverable with plain reasons. Use validate_email first if you only need syntax. No SMTP probe is made and no mail is sent, so it cannot confirm the mailbox exists. The address is not stored or logged. Read-only; one live DNS lookup via Cloudflare DoH. Costs $0.005 USDC per call via x402 (payment goes in _meta["x402/payment"]); invalid input or a DNS failure returns an error and is not charged.	No	Yes	Yes	Yes
`email_fix_plan`Get an email security fix plan for one domain: the exact SPF, DKIM and DMARC DNS records to publish (create / replace / keep, record name, value and why), in order, plus click-path steps for the domain's DNS host (Cloudflare, GoDaddy, Route 53, Namecheap, Squarespace/Google, Vercel and others). Reads live MX, NS, SPF, DKIM and DMARC; detects Google Workspace, Microsoft 365, Zoho, Proton, Fastmail, GoDaddy and Cloudflare Email Routing; merges SPF within the 10-lookup limit, keeps existing senders, and stages DMARC none -> quarantine -> reject. Domains that send no mail get a lock-down set. Use it when mail lands in spam, before a DMARC rollout, or for a client. DKIM keys are generated by the mail provider, so for those it gives the exact console path. Read-only; nothing is stored. Costs $1 USDC per call via x402 (payment goes in _meta["x402/payment"]); invalid input, an unknown domain or a DNS failure returns an error and is not charged.	Get an email security fix plan for one domain: the exact SPF, DKIM and DMARC DNS records to publish (create / replace / keep, record name, value and why), in order, plus click-path steps for the domain's DNS host (Cloudflare, GoDaddy, Route 53, Namecheap, Squarespace/Google, Vercel and others). Reads live MX, NS, SPF, DKIM and DMARC; detects Google Workspace, Microsoft 365, Zoho, Proton, Fastmail, GoDaddy and Cloudflare Email Routing; merges SPF within the 10-lookup limit, keeps existing senders, and stages DMARC none -> quarantine -> reject. Domains that send no mail get a lock-down set. Use it when mail lands in spam, before a DMARC rollout, or for a client. DKIM keys are generated by the mail provider, so for those it gives the exact console path. Read-only; nothing is stored. Costs $1 USDC per call via x402 (payment goes in _meta["x402/payment"]); invalid input, an unknown domain or a DNS failure returns an error and is not charged.	No	Yes	Yes	Yes
`pricing`Free. Return the price of check_email_address (and of the HTTP-only email test report), the payment network (Base) and the receiving address. No input, no network request, no payment.	Free. Return the price of check_email_address (and of the HTTP-only email test report), the payment network (Base) and the receiving address. No input, no network request, no payment.	No	Yes	Yes	No
`validate_email`Free. Check the syntax of an email address offline and get the normalized address and domain, before paying for check_email_address. No DNS lookup, no network request, no payment.	Free. Check the syntax of an email address offline and get the normalized address and domain, before paying for check_email_address. No DNS lookup, no network request, no payment.	No	Yes	Yes	No

Details

Registry status: Active
Published: Oct 14, 2026
Updated: Oct 14, 2026
Website: https://api.inboxguardstest.com/llms.txt⁠ (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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