"An overview of OSINT (Open Source Intelligence)" matching MCP connectors:

Crevio's MCP server lets an agent run a real online business, not just read from one. It exposes a delegation surface (ask_crevio, start_task, wait_for_run, send_message, resolve_approvals) plus code_search and code_execute for calling the full Crevio REST API - products, customers, orders, email, socials, and sites.

7 outreach, sequencing, call-coaching and CRM-hygiene skill products. 6 of 8 free.

An AI agent that runs your online business: products, orders, customers, email, and sites.

Gives an AI agent its own email address: create mailboxes, send and reply, read the inbox, and block until a reply arrives. Includes a draft lifecycle so a human can approve outbound mail before it sends.

7 sales-outreach persona and skill products plus deliverability tooling over MCP: audit_copy scores email copy out of 100 for spam triggers and personalization, sequence_planner builds opt-out-respecting cadences, subject_line_scorer ranks up to 20 lines, utm_builder produces tracking URLs, and get_free_skill loads any product's complete free gateway skill.

Give an agent its own inbox: send, receive, and pull signup codes from real email.

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links. 34 tools; bearer auth with an mfx_ API key (free tier).

Open-source MCP server that gives AI agents access to real email and calendar in one npm install. Solves the problem of AI agents hitting a wall when they need your inbox.

Giggal.ai is an email verification tool that runs a deep mailbox existence check on every address and verifies catch-all/accept-all and even SEG protected emails. Your bounce rate stays under 5%, and the 30% of every B2B list that other tools flag as "Risky" becomes deliverable again.

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

Objective DNS-level email and domain capability intelligence for AI agents. Check domain existence, mail capability, MX provider, disposable status, SPF, DMARC and MTA-STS without SMTP probing.

Give an AI agent its own inbox — receive email as a webhook, send over a verified domain.

InboxPolicy is an MCP email-verification server for agents. Get an actionable verdict: send, send_with_caution, review, retry_later, or avoid, with confidence and SMTP evidence, plus tools for detailed verification, asynchronous batches, and usage tracking

Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.

First-party MCP server for Fastmail, including email, contacts, and calendars. See: https://www.fastmail.com/blog/an-mcp-server-for-fastmail/

Run personalised outreach campaigns and manage conversations using a virtual computer equipped with email capabilities, research tools, and workflow automation. Email Outreach by OpenHelm enables your agent to carry out work such as: • Prospect research • Personalised outbound email campaigns • Lead qualification • Follow-up sequences • Inbox monitoring and response handling