Developer Tools & Devops · Verifi.Email + Claude
Verifi.Email MCP with Claude: Clean Contact Lists and Catch Email Security Gaps
The short answer
Claude connects to Verifi.Email through the Model Context Protocol (MCP), a secure standard that lets Claude use the tool with permissions you control. Once connected, Claude can validate email addresses, check a domain's SPF, DKIM and DMARC records, flag risky contacts, and clean lead lists from a plain-English request.
What is Verifi.Email?
Verifi.Email is a public API for validating email addresses and checking domain mail-security records. It helps teams find invalid addresses before they send, and spot domains missing SPF, DKIM or DMARC settings that protect against spoofing. Sales, marketing, operations and IT teams typically use it to keep contact lists healthy and sending domains secure.
How Claude connects to Verifi.Email through MCP
The Model Context Protocol (MCP) is an open standard that lets Claude securely use other software. Think of it as a universal adapter between Claude and a tool. Verifi.Email provides an MCP connection, or your team can use its direct API, so Claude can request checks without anyone copying data between screens.
Once connected, Claude can typically validate a single address or a whole list, check whether a domain has its SPF, DKIM and DMARC records in place, and flag contacts that look risky. You can ask in everyday language, such as asking Claude to clean this list and explain which rows were removed and why.
Access is controlled by your organisation. Connections use an API key with least-privilege settings, so Claude only does what you allow. Consequential actions, such as removing contacts from a live list, can be set to require a person's approval first, and every request can be logged for review.
What you can automate
Cleaning lead lists before a campaign
A marketing manager uploads a list of 8,000 leads exported from a trade show. Claude checks each address through Verifi.Email, separates valid, risky and invalid contacts, and produces a summary. The team sends only to the verified group, which typically protects sender reputation and reduces bounce rates.
Validating sign-up forms and checkout data
An operations lead wants fewer fake or mistyped addresses entering the customer database. Claude can check new sign-ups against Verifi.Email and flag suspicious entries for review, so the team spots typos and disposable addresses early instead of discovering them after a failed welcome e-mail.
Auditing sending domains for security gaps
An IT administrator maintains several company domains. Claude can check each domain for SPF, DKIM and DMARC records and produce a plain-English list of gaps, with the missing setting and a suggested fix. This helps the IT team prioritise work on domains that send mail on the company's behalf.
Preparing CRM data for sales teams
A sales operations manager wants account owners to trust their CRM. Claude can review contact records, validate addresses, and flag risky entries so the team can update or archive them. Sales staff spend less time chasing bounced e-mails and more time on real prospects.
Monitoring list health over time
A customer success team runs a monthly check on its active customer list. Claude runs the validation, compares results with the previous month, and reports the change in valid and risky contacts. Leaders get a short trend note rather than a raw spreadsheet.
An end-to-end workflow: Monthly lead list cleaning with CRM sync
TriggerA new lead list is exported from the CRM at the start of each month.
Claude receives the exported list and checks every address through Verifi.Email.
Claude groups contacts into valid, risky and invalid, and notes the reason for each risky flag.
Claude drafts a summary for the marketing lead, showing counts and any unusual patterns.
The marketing lead reviews the summary and approves the removal of invalid contacts.
Approved changes are written back to the CRM, and an audit log records each update.
OutcomeMarketing sends campaigns only to verified contacts, bounce rates typically fall, and the CRM stays accurate with a clear record of every change.
How we set it up
Free automation audit
We review your current contact handling, sender domains and workflows to identify where email validation and security checks would save time or reduce risk.
Secure connection
We connect Claude to Verifi.Email using an API key stored securely, with least-privilege access so Claude can only perform the checks you approve.
Workflow design
We design the end-to-end process across Verifi.Email and your other systems, such as Microsoft 365, your CRM or ticketing tool, and agree which actions need human approval.
Testing against real cases
We test the workflow using past lists and real domains, compare results with what your team already knows, and adjust rules until the output is reliable.
Launch and training
We launch with monitoring and audit logs in place, then train your team on how to ask Claude for checks, review results and handle flagged records.
Who benefits
- Marketing managers
- Send campaigns to verified contacts and protect sender reputation.
- Sales operations leads
- Keep CRM contact data clean so sales teams work with reachable prospects.
- IT and security administrators
- Identify sending domains missing SPF, DKIM or DMARC records and prioritise fixes.
- Customer success and operations heads
- Track the health of customer contact lists over time with plain-English reports.
Security and control
- Access uses an API key with least-privilege permissions, limited to the checks you approve.
- Consequential actions, such as deleting or changing live contact records, can require human approval.
- Every request and result can be logged so your team can review what Claude checked and changed.
- Personal data in contact lists is handled only as your policies allow, and sensitive fields can be excluded from what Claude sees.
For teams in the US, UK, India and the Middle East
Organisations in the United States and the United Kingdom can host their Claude automation in regions that meet their data-handling requirements. Indian organisations must consider the Digital Personal Data Protection Act, 2023, when processing contact data. Companies in the UAE and Saudi Arabia must follow their local data protection laws. We choose the hosting region, whether India, the United States, the United Kingdom or the European Union, to suit your obligations.
Learn more about Claude and MCP
Anthropic's AI model and assistant.
Secure links between Claude and business tools.
How engineers build and change software with Claude.
Hosted agents that run multi-step work.
The open standard Claude uses to connect to tools.
Frequently asked questions
What does the Verifi.Email MCP server do?
The MCP server gives Claude a secure way to use Verifi.Email. Through it, Claude can request address validation and domain security checks, and return the results in plain English. It acts as a connector, so Claude works with the tool without anyone manually copying data between the two.
Is connecting Verifi.Email to Claude secure?
Security depends on how the connection is set up. We use an API key stored securely, limit Claude to the permissions you approve, require human approval for consequential actions, and keep audit logs of every request. This reduces risk, though no setup can guarantee complete security.
What can Claude actually do with Verifi.Email?
Typically, Claude can validate single addresses or whole lists, check domains for SPF, DKIM and DMARC records, flag risky contacts, and summarise results. It can also help clean lead lists by grouping records and drafting reports, while your team decides which changes to make.
How long does setup take?
A simple connection can be set up in a few days once the audit is complete. A full workflow involving your CRM or other systems usually takes a few weeks, including testing against real cases and training your team before launch.
Which plan or permissions do I need?
You need an active Verifi.Email account that provides an API key with the permissions your planned checks require. Because plans and limits change, confirm with the vendor which access level covers your volume. During the free audit we check that your setup has what the workflow needs.