Qualisend Email Verification

by qualisend.com · remote · no sign-in to list tools · v1.0.0 · published by com.qualisend

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

Changes · 9

Compare Registry entry

12 tools: 9 change things and 3 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things9Claude Code: ask: see these tools
Only reads3Claude Code: allow: see these tools

3 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http email-verification https://app.qualisend.com/api/mcp

Findings

Matches of fixed checks, with the text they matched.

3 warn

Warnverify_list
The server marks "verify_list" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"openWorldHint":true}; The name "verify_list" says "list": a word for reading.
What this check looks for
Warngenerate_dns_record
The server marks "generate_dns_record" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The name "generate_dns_record" says "generate": a word for a change.
What this check looks for
Warnlookup_smtp_code
The server marks "lookup_smtp_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The name "lookup_smtp_code" says "lookup": a word for reading.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

12 tools

Changes things 9Creates or changes something that can be changed back.Claude Code: ask

check_blacklistCheck 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…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Check a domain or IP against email blacklists
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
check_disposableTell 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…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Check if an email is throwaway / generic / free
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
check_domainCheck 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.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Check a domain's email setup
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
check_typoSpot 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 findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Suggest a fix for a mistyped email
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
generate_dns_recordCreate the exact DNS setting a domain needs so its email is trusted and harder to spoof - SPF, DMARC, BIMI, or MTA-STS.1 finding
Why it is in this group
- The name "generate_dns_record" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "generate_dns_record" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The name "generate_dns_record" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
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.
Annotations the server declares
- title: Create an email-authentication DNS record
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
lookup_smtp_codeExplain 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.1 finding
Why it is in this group
- The name "lookup_smtp_code" says "lookup": a word for reading.
- The input takes a statement or command to run (input.code), which can change anything it can reach.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "lookup_smtp_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The name "lookup_smtp_code" says "lookup": a word for reading.
  What this check looks for
Description, as the server wrote it
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.
Annotations the server declares
- title: Explain a mail-server error code
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
verify_emailVerify a single email address - syntax, domain/MX, disposable + role detection, typo suggestion, and mailbox reachability.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
Annotations the server declares
- title: Verify an email address
- readOnlyHint: false
- destructiveHint: false
- openWorldHint: true
verify_emailsVerify up to 50 email addresses at once and get a deliverability verdict for each, synchronously.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
Annotations the server declares
- title: Verify a batch of email addresses
- readOnlyHint: false
- destructiveHint: false
- openWorldHint: true
verify_listVerify a large list of up to 1000 email addresses.1 finding
Why it is in this group
- The name "verify_list" says "list": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
Findings
- Warn
  The server marks "verify_list" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"openWorldHint":true}; The name "verify_list" says "list": a word for reading.
  What this check looks for
Description, as the server wrote it
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.
Annotations the server declares
- title: Verify a large list of email addresses
- readOnlyHint: false
- destructiveHint: false
- openWorldHint: true

Only reads 3Looks things up and changes nothing.Claude Code: allow

analyze_email_headerRead 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 figur…No findings
Why it is in this group
- The name "analyze_email_header" says "analyze": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Analyze an email's headers
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
get_credit_balanceReturn the number of verification credits available in your Qualisend workspace.No findings
Why it is in this group
- The name "get_credit_balance" says "get": a word for reading.
Description, as the server wrote it
Return the number of verification credits available in your Qualisend workspace.
Annotations the server declares
- title: Get credit balance
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
get_verificationLook up the status and result of a verification you started, by job_id (returned from verify_email/verify_emails).No findings
Why it is in this group
- The name "get_verification" says "get": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Get a verification result
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http email-verification https://app.qualisend.com/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__email-verification__get_credit_balance",
      "mcp__email-verification__get_verification",
      "mcp__email-verification__analyze_email_header"
    ],
    "ask": [
      "mcp__email-verification__verify_email",
      "mcp__email-verification__verify_emails",
      "mcp__email-verification__verify_list",
      "mcp__email-verification__check_domain",
      "mcp__email-verification__generate_dns_record",
      "mcp__email-verification__check_disposable",
      "mcp__email-verification__check_typo",
      "mcp__email-verification__lookup_smtp_code",
      "mcp__email-verification__check_blacklist"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as email-verification. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.qualisend/email-verification/changes.xml

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Source: MCP Registry. Synced Oct 21, 2026, 18:01 UTC.

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