"API for Claude AI" matching MCP servers:

Create disposable email inboxes, extract OTP codes in 15 languages, and receive webhooks — all from your AI agent. One call: create inbox → wait for email → get the verification code. Supports 7 domains, email forwarding, and HMAC-signed webhooks with OTP included in payload. Free tier available.

Enables AI assistants to interact with the Instantly.ai v2 API to manage campaigns, leads, accounts, replies, blocklist, and webhooks, with tools organized into read, write, and dangerous safety tiers.

Connects Claude Desktop to a local email client, enabling AI-powered email reading, searching, drafting, and organization while preventing sending or permanent deletion.

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.

Enables AI assistants to manage multiple Outlook/Microsoft 365 mailboxes simultaneously through MCP tools, with local OAuth token storage.

A Gmail MCP server that enables Claude to send, search, and read emails using either Gmail API or SMTP/IMAP backend.

MCP server for Google APIs — Gmail and Calendar tools for LLM agents.

A minimal MCP server for sending plain-text emails and managing Gmail user labels over stdio, using only gmail.send and gmail.labels OAuth scopes.

MCP server that encapsulates Apple Mail on macOS via AppleScript, enabling invoice PDF search, attachment saving, and message flagging through natural language.

An unofficial MCP server for Smartlead that exposes the SmartProspect API and core Smartlead operations, enabling agents to search for leads, manage campaigns, and control credit spending with configurable safety modes.

Sendmux is an email inbox API and email API for AI agents. Use this MCP server to let authorised agents work with Sendmux mailboxes, inbound email, clean JSON parsing, webhooks, outbound sending, provider routing, logs, billing, and team controls.

MCP server for Checkpoint Harmony Email & Collaboration (Avanan). Enables AI assistants to manage email security, anti-phishing, anti-malware, and threat detection via the Avanan API.

An MCP-powered AI agent that audits your Gmail for recurring subscriptions, detects silent price increases, and flags unused services.

An MCP server for Abnormal Security, enabling management of threat detection, email security cases, and AI-powered attack protection through Abnormal's API.

MCP server for Gmail that provides tools to download attachments, fetch raw messages, manage filters, and create drafts, while deliberately omitting send functionality for safety.

MCP server for Ironscales — phishing incident management, email classification, and remediation

An MCP server that provides an email operating system for AI agents, enabling inbox triage and reply drafting while enforcing un-bypassable safety constraints on sensitive actions like money transfers and banking changes.

Enables AI agents to read and manage Microsoft 365/Outlook email and calendar, with destructive actions (send email, create event) requiring human approval.

Enables AI assistants to connect to Gmail accounts, check connection status, and send emails through a secure OAuth 2.0 interface.

An MCP server that provides AI agents with direct access to authoritative Cakemail API specifications, enabling accurate code generation and eliminating hallucination.