Communication MCP Servers

Check whether an email address can receive mail, one address or a list, without sending to it.

People, company, job and LinkedIn post data, plus email finding and verification.

Unified social posting, inbox & analytics across 12+ platforms. Sign in with Dystro or API key.

Official ISBN-13 under your own imprint, delivered by e-mail within 6 h. Packs, prices, order links.

Domain availability over RDAP, watchlists with daily or hourly checks, change history and alerts.

Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMA.

x402 v2 payment requests; relays compatible clients' signed payments to the existing product API.

Verify email addresses in bulk: syntax, domain, MX, disposable and role addresses, SPF and DMARC

Lifecycle marketing in Claude: Braze, email QA, deliverability, segmentation. Free, no key.

AI-native CRM: records, pipelines, tasks, calendar and the email, LinkedIn and WhatsApp inbox.

Set up form handling for your site (email alerts, auto replies, webhooks) and query submissions.

Find Polish companies (CEIDG, KRS, Google Maps), verify emails and run cold email campaigns from AI.

Watches Czech used-car ads for a buyer. Takes no contact; active only after e-mail opt-in.

Verify email addresses before you send: honest verdicts, no address kept, EU-hosted.

Find newly registered businesses, manage prospects, and run approval-gated email outreach.

Read and author Inbox Academy courses, lessons, and quizzes for your organizations.

Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.

Search US jobs by driving commute, pay, and seniority. Save jobs, filters, and searches.

Small-business CRM, tasks, social posting, email campaigns, analytics and growth hypotheses