# Qualisend

> Qualisend is an email verification and list-cleaning service that protects sender reputation and deliverability. It checks each address in real time — syntax, DNS/MX, disposable, role, catch-all and a live SMTP mailbox probe — and returns a deliverable / risky / undeliverable / unknown verdict with a 0–100 confidence score. It offers a REST API, native one-click connectors to 60+ email, CRM, e-commerce, helpdesk and outreach platforms, an MCP server for AI agents (Claude, ChatGPT, Grok, and any MCP client), and a suite of free deliverability tools.

## Product
- [Features](https://www.qualisend.com/features): the eight-step verification pipeline, explained
- [Pricing](https://www.qualisend.com/pricing): plans and credit pricing; 100 free credits that never expire
- [Integrations](https://www.qualisend.com/integrations): native connectors + the CSV/API workflow for 60+ platforms
- [Developer API](https://www.qualisend.com/developers): the REST API — verify one address or a whole list
- [Blacklist monitoring](https://www.qualisend.com/blacklist-monitoring): get alerted the moment a domain/IP is listed
- [Chrome extension](https://www.qualisend.com/chrome-extension): "Email Verifier by Qualisend" — verify an address you type or right-click, or scan the current page (Google Sheets included); Chrome Web Store: https://chromewebstore.google.com/detail/email-verifier-by-qualise/jlpkjhcndhkomgdmoecgahaompmflknj

## MCP server (email verification for AI agents)
- [MCP overview](https://www.qualisend.com/mcp): connect Qualisend to Claude, ChatGPT, Grok, or any MCP client and verify email in plain language
- [MCP documentation](https://www.qualisend.com/mcp/docs): endpoint, OAuth 2.1 / API-key auth, all 12 tools, security, and data handling
- MCP endpoint: https://app.qualisend.com/api/mcp (Streamable HTTP)

Per-client setup guides — the exact menu path, config keys and gotchas for each:
- [Claude setup](https://www.qualisend.com/mcp/claude): connect Qualisend to Claude (web, desktop and mobile) (Anthropic)
- [ChatGPT setup](https://www.qualisend.com/mcp/chatgpt): connect Qualisend to ChatGPT (web) (OpenAI)
- [Grok setup](https://www.qualisend.com/mcp/grok): connect Qualisend to Grok (web, iOS and Android) (xAI)
- [Claude Code setup](https://www.qualisend.com/mcp/claude-code): connect Qualisend to Claude Code (Anthropic)
- [Cursor setup](https://www.qualisend.com/mcp/cursor): connect Qualisend to Cursor (Anysphere)
- [VS Code setup](https://www.qualisend.com/mcp/vs-code): connect Qualisend to VS Code (GitHub Copilot agent mode) (Microsoft)
- [Codex CLI setup](https://www.qualisend.com/mcp/codex-cli): connect Qualisend to Codex CLI, ChatGPT desktop app and the Codex IDE extension (OpenAI)
- [Gemini CLI setup](https://www.qualisend.com/mcp/gemini-cli): connect Qualisend to Gemini CLI (Google)
- [Zed setup](https://www.qualisend.com/mcp/zed): connect Qualisend to Zed (Zed Industries)
- [Goose setup](https://www.qualisend.com/mcp/goose): connect Qualisend to Goose (Block)
- [Windsurf setup](https://www.qualisend.com/mcp/windsurf): connect Qualisend to Windsurf, now Devin Desktop (Devin Local) (Cognition)

## Integrations
Native email-verification connectors, grouped by category. Hub: [https://www.qualisend.com/integrations](https://www.qualisend.com/integrations)

### Email marketing
- [ActiveCampaign](https://www.qualisend.com/integrations/activecampaign): native connector — live
- [beehiiv](https://www.qualisend.com/integrations/beehiiv): native connector — live
- [Bloomreach](https://www.qualisend.com/integrations/bloomreach): native connector — live
- [Braze](https://www.qualisend.com/integrations/braze): native connector — live
- [Brevo](https://www.qualisend.com/integrations/brevo): native connector — live
- [Campaign Monitor](https://www.qualisend.com/integrations/campaign-monitor): native connector — live
- [CleverTap](https://www.qualisend.com/integrations/clevertap): native connector — live
- [Customer.io](https://www.qualisend.com/integrations/customer-io): native connector — live
- [Dotdigital](https://www.qualisend.com/integrations/dotdigital): native connector — live
- [Drip](https://www.qualisend.com/integrations/drip): native connector — live
- [EmailOctopus](https://www.qualisend.com/integrations/emailoctopus): native connector — live
- [Emma](https://www.qualisend.com/integrations/emma): native connector — live
- [GetResponse](https://www.qualisend.com/integrations/getresponse): native connector — live
- [Iterable](https://www.qualisend.com/integrations/iterable): native connector — live
- [Kit](https://www.qualisend.com/integrations/kit): native connector — live
- [Klaviyo](https://www.qualisend.com/integrations/klaviyo): native connector — live
- [Mailchimp](https://www.qualisend.com/integrations/mailchimp): native connector — live
- [MailerLite](https://www.qualisend.com/integrations/mailerlite): native connector — live
- [Marketo](https://www.qualisend.com/integrations/marketo): native connector — live
- [MoEngage](https://www.qualisend.com/integrations/moengage): native connector — live
- [Moosend](https://www.qualisend.com/integrations/moosend): native connector — live
- [Omnisend](https://www.qualisend.com/integrations/omnisend): native connector — live
- [Ontraport](https://www.qualisend.com/integrations/ontraport): native connector — live
- [Ortto](https://www.qualisend.com/integrations/ortto): native connector — live
- [Sailthru](https://www.qualisend.com/integrations/sailthru): native connector — live
- [Sendlane](https://www.qualisend.com/integrations/sendlane): native connector — live
- [AWeber](https://www.qualisend.com/integrations/aweber): coming soon
- [Constant Contact](https://www.qualisend.com/integrations/constant-contact): coming soon
- [Salesforce Marketing Cloud](https://www.qualisend.com/integrations/salesforce-marketing-cloud): coming soon
- [Salesforce Pardot](https://www.qualisend.com/integrations/salesforce-pardot): coming soon
- [Zoho Campaigns](https://www.qualisend.com/integrations/zoho-campaigns): coming soon

### Transactional
- [Mailgun](https://www.qualisend.com/integrations/mailgun): native connector — live
- [Mailjet](https://www.qualisend.com/integrations/mailjet): native connector — live
- [SendGrid](https://www.qualisend.com/integrations/sendgrid): native connector — live
- [Amazon SES](https://www.qualisend.com/integrations/amazon-ses): coming soon
- [Postmark](https://www.qualisend.com/integrations/postmark): coming soon

### CRM & sales
- [Close](https://www.qualisend.com/integrations/close): native connector — live
- [Copper](https://www.qualisend.com/integrations/copper): native connector — live
- [Keap](https://www.qualisend.com/integrations/keap): native connector — live
- [Pipedrive](https://www.qualisend.com/integrations/pipedrive): native connector — live
- [HubSpot](https://www.qualisend.com/integrations/hubspot): coming soon

### Cold outreach
- [Lemlist](https://www.qualisend.com/integrations/lemlist): native connector — live
- [Woodpecker](https://www.qualisend.com/integrations/woodpecker): native connector — live
- [Outreach](https://www.qualisend.com/integrations/outreach): coming soon
- [Salesloft](https://www.qualisend.com/integrations/salesloft): coming soon

### Forms & lead capture
- [Gravity Forms](https://www.qualisend.com/integrations/gravity-forms): native connector — live
- [Jotform](https://www.qualisend.com/integrations/jotform): native connector — live
- [Tally](https://www.qualisend.com/integrations/tally): native connector — live
- [Typeform](https://www.qualisend.com/integrations/typeform): native connector — live
- [Formstack](https://www.qualisend.com/integrations/formstack): coming soon
- [HubSpot Forms](https://www.qualisend.com/integrations/hubspot-forms): coming soon
- [Webflow Forms](https://www.qualisend.com/integrations/webflow): coming soon

### E-commerce
- [BigCommerce](https://www.qualisend.com/integrations/bigcommerce): native connector — live
- [Ecwid](https://www.qualisend.com/integrations/ecwid): native connector — live
- [Squarespace](https://www.qualisend.com/integrations/squarespace): native connector — live
- [WooCommerce](https://www.qualisend.com/integrations/woocommerce): native connector — live
- [Shopify](https://www.qualisend.com/integrations/shopify): coming soon
- [Wix](https://www.qualisend.com/integrations/wix): coming soon

### Support & helpdesk
- [Freshdesk](https://www.qualisend.com/integrations/freshdesk): native connector — live
- [Front](https://www.qualisend.com/integrations/front): native connector — live
- [Help Scout](https://www.qualisend.com/integrations/helpscout): native connector — live
- [Intercom](https://www.qualisend.com/integrations/intercom): native connector — live
- [Zendesk](https://www.qualisend.com/integrations/zendesk): native connector — live

## Free tools
- [All tools](https://www.qualisend.com/tools)
- [Verify a single email address, free](https://www.qualisend.com/free-email-checker)
- [Check a domain's SPF, DKIM & DMARC](https://www.qualisend.com/tools/spf-dkim-dmarc-checker)
- [Domain email-health check (SPF/DKIM/DMARC/MX)](https://www.qualisend.com/tools/domain-health-check)
- [MX record lookup](https://www.qualisend.com/tools/mx-record-lookup)
- [Check a domain or IP against DNS blocklists](https://www.qualisend.com/tools/blacklist-checker)
- [Analyze an email's headers](https://www.qualisend.com/tools/email-header-analyzer)
- [Generate a valid SPF record](https://www.qualisend.com/tools/spf-record-generator)
- [Generate a valid DMARC record](https://www.qualisend.com/tools/dmarc-record-generator)
- [Look up an SMTP response code](https://www.qualisend.com/tools/smtp-code-lookup)
- [Bounce-rate calculator](https://www.qualisend.com/tools/bounce-rate-calculator)

## Guides
- [Blog](https://www.qualisend.com/blog): 160+ deliverability, verification and integration guides
- [Glossary](https://www.qualisend.com/glossary): email deliverability terms, defined
- [The complete guide to email deliverability](https://www.qualisend.com/blog/email-deliverability-guide)
- [How email verification works (the 8-stage pipeline)](https://www.qualisend.com/blog/how-email-verification-works)
- [What email verification is and why it matters](https://www.qualisend.com/blog/what-is-email-verification)
- [How to clean an email list](https://www.qualisend.com/blog/how-to-clean-an-email-list)
- [How often to clean your list](https://www.qualisend.com/blog/how-often-clean-email-list)
- [Why bounce rate matters](https://www.qualisend.com/blog/why-bounce-rate-matters)
- [Google & Yahoo bulk-sender requirements (2024)](https://www.qualisend.com/blog/google-yahoo-sender-requirements)
- [Email authentication: SPF, DKIM & DMARC](https://www.qualisend.com/blog/email-authentication-spf-dkim-dmarc)
- [What is a catch-all address](https://www.qualisend.com/blog/what-is-a-catch-all-email)
- [Role, disposable & free addresses](https://www.qualisend.com/blog/role-disposable-free-addresses)
- [What is greylisting](https://www.qualisend.com/blog/what-is-greylisting)
- [Email verification for ecommerce](https://www.qualisend.com/blog/email-verification-for-ecommerce)
- [Email verification for cold email](https://www.qualisend.com/blog/email-verification-for-cold-email)
- [Email verification for SaaS](https://www.qualisend.com/blog/email-verification-for-saas)

## Company
- [About](https://www.qualisend.com/about)
- [Security & trust](https://www.qualisend.com/security): EU data residency, encryption, and data handling
- [Contact](https://www.qualisend.com/contact)
- [Partners](https://www.qualisend.com/partners): affiliate, agency and integration partner programs — up to 30% revenue share
- [Feature requests](https://www.qualisend.com/feature-request): suggest a feature
- [Privacy Policy](https://www.qualisend.com/privacy-policy)
- [Terms of Service](https://www.qualisend.com/terms-of-service)

## Full index
- [Sitemap](https://www.qualisend.com/sitemap.xml): every page, in English and 4 other languages (es, de, fr, pt-BR)