Qualisend Email Verification

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Verify email addresses and clean lists to improve deliverability and sender reputation.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Qualisend Email Verification": {
      "url": "https://app.qualisend.com/api/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (12)

• verify_email

  Verify a single email address - syntax, domain/MX, disposable + role detection, typo suggestion, and mailbox reachability. Returns a deliverability verdict (deliverable / risky / undeliverable / unknown). Consumes 1 credit.

  Parameters:

  • email (required) — string — The email address to verify.

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• verify_emails

  Verify up to 50 email addresses at once and get a deliverability verdict for each, synchronously. Consumes 1 credit per address. For larger lists (up to 1000), use verify_list.

  Parameters:

  • emails (required) — array — Email addresses to verify (1-50).

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• verify_list

  Verify a large list of up to 1000 email addresses. This runs ASYNCHRONOUSLY: it creates ONE bulk job, returns a job_id immediately, and the mailbox probes run in the background. Poll get_verification with the job_id for progress and a result summary (counts by verdict). Consumes 1 credit per address. For lists larger than 1000, use the Qualisend dashboard or bulk API.

  Parameters:

  • emails (required) — array — Email addresses to verify (1-1000).

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• get_credit_balance read-only

  Return the number of verification credits available in your Qualisend workspace.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• get_verification read-only

  Look up the status and result of a verification you started, by job_id (returned from verify_email/verify_emails). For a single check it returns the final verdict once the mailbox probe completes; for a batch it returns progress + a result-mix summary.

  Parameters:

  • job_id (required) — string — The job_id returned by a verify tool.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• check_domain read-only

  Check whether a domain is set up to send email that reaches the inbox - its mail servers plus its SPF and DMARC sender-authentication, and what's missing. A plain deliverability health check for a sending domain. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • domain (required) — string — The domain to check, e.g. acme.com.

  Hints: read-only yes · destructive no · idempotent not declared · open-world yes

• generate_dns_record read-only

  Create the exact DNS setting a domain needs so its email is trusted and harder to spoof - SPF, DMARC, BIMI, or MTA-STS. Returns the record to copy into DNS, with where to put it. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • type (required) — string — Which record to create.
  • domain (required) — string — The domain the record is for.
  • all — string — SPF: how strict to be with everyone else (default ~all).
  • ip4 — array — SPF: allowed IPv4 addresses/ranges.
  • ip6 — array — SPF: allowed IPv6 addresses/ranges.
  • pct — number — DMARC: percent of mail the policy applies to.
  • rua — string — DMARC: email to receive summary reports.
  • ruf — string — DMARC: email to receive detailed failure reports.
  • mode — string — MTA-STS: policy mode (default testing).
  • policy — string — DMARC: what to do with mail that fails checks.
  • logoUrl — string — BIMI: https link to the brand's SVG logo.
  • mxHosts — array — MTA-STS: the domain's mail-server hostnames.
  • includes — array — SPF: services allowed to send (e.g. _spf.google.com).
  • authorityUrl — string — BIMI: https link to the VMC certificate.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• analyze_email_header read-only

  Read the hidden technical details of an email (its 'headers') to show the route it took, how long each step took, and whether it passed spam/authentication checks - handy for figuring out why a message was slow or went to spam. Paste the message source / 'Show original'. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • raw (required) — string — The raw email headers (paste the message source).

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• check_disposable read-only

  Tell whether an email address is a throwaway/temporary one, a generic team inbox (like info@ or support@), or a free consumer address (like gmail) - useful for spotting low-quality sign-ups. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • email (required) — string — The email address to check.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• check_typo read-only

  Spot a likely typo in an email's domain (like gmial.com) and suggest the correct one, so you don't lose contacts to misspelled addresses. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • email (required) — string — The email address to check for a typo.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• lookup_smtp_code read-only

  Explain a mail-server reply/error code (like 550 or 5.1.1) in plain English, and say whether it's a temporary hiccup or a permanent failure. No credit used. Available on the Qualisend Pro plan.

  Parameters:

  • code (required) — string — The SMTP code, e.g. 550 or 5.1.1.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• check_blacklist read-only

  Check whether a sending domain or IP is currently on any of the major email blacklists that can push your mail to spam - a point-in-time reputation check across lists like Spamhaus, SpamCop, and Barracuda. No credit used. Requires the Qualisend Blacklist Monitoring add-on. Read the result carefully: `listed_on` are confirmed listings, while `undetermined_on` are lists that did not answer (commonly Spamhaus refusing a shared resolver). `clean` is true only when every list answered and none matched, so a non-empty `undetermined_on` means those lists are UNKNOWN - do not report them as clear or as listings.

  Parameters:

  • target (required) — string — A domain (acme.com) or an IPv4 address.

  Hints: read-only yes · destructive no · idempotent not declared · open-world yes

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