Communications
Messaging, customer support and meeting applications. Reading information and sending messages have different effects and permissions.
Services are ordered by documented operations, attributed reports and current documentation. 115 services are classified here. Each card shows the interfaces a service offers; open it for access requirements and sources.
Categories · Tasks · Interfaces · How listings are checked
Brevo
A unified REST API for sending messages across email, SMS, and WhatsApp
Communications
API · Documentation checked: 2026-10-08MCP · Documentation checked: 2026-10-07API · Access documentation verifiedCalendly
A scheduling application for booking meetings and managing availability, event types and scheduled events.
Communications
MCP · Access documentation verifiedAPI · Documentation checked: 2026-10-06Google Calendar
A calendar application for managing calendars, events and scheduling.
Communications
CLI · Documentation checked: 2026-10-06API · Documentation checked: 2026-10-07Postmark
Transactional email delivery service for developers with a REST API, SMTP, templates and webhooks.
Communications · Developer tools
API · Access documentation verifiedNylas
Email, calendar and contacts API platform with an official CLI and MCP server for AI agents.
Communications · Developer tools · Productivity and collaboration
MCP · Access documentation verifiedCLI · Access documentation verifiedAPI · Access documentation verifiedKlaviyo
Email and SMS marketing platform with a REST API, SDKs and a hosted MCP server.
Communications · Commerce
API · Access documentation verifiedMCP · Access documentation verifiedTelnyx
Communications infrastructure for voice, messaging, AI inference and edge compute, with a REST API and a hosted MCP server.
Communications · Developer tools
MCP · Documentation checked: 2026-10-06API · Access documentation verifiedKnock
Notification infrastructure for product messaging across email, SMS, push and in-app, with an API, a CLI and a remote MCP server.
Communications · Developer tools
MCP · Access documentation verifiedAPI · Access documentation verifiedCLI · Access documentation verifiedMailgun
Email API service for developers to send, receive and track email, with a REST API and a local MCP server.
Communications · Developer tools
MCP · Access documentation verifiedAPI · Access documentation verifiedResend
Email API for developers to send transactional and marketing email, with SDKs, a CLI and a hosted MCP server.
Communications · Developer tools
MCP · Access documentation verifiedAPI · Access documentation verifiedLabsMobile
LabsMobile provides SMS messaging services and an HTTP API. Its read-only balance inquiry returns the available message credits for an authenticated account.
SMS messaging · Communications · API
API · Access documentation verifiedTwilio
Communications platform with APIs for SMS, voice, WhatsApp, email and verification, plus a command-line interface.
Communications · Developer tools
CLI · Access documentation verifiedAPI · Access documentation verifiedVonage
Communications APIs for messaging, voice, video, verification and identity.
Communications · Developer tools
API · Access documentation verifiedMail.tm
Mail.tm provides a temporary email REST API for creating mailbox accounts and receiving messages.
Communications · api · communication
API · Documentation checked: 2026-10-10ReplyLayer
ReplyLayer provides scoped email infrastructure for AI agents through REST, CLI, SDK, and MCP interfaces, with security scanning on messages.
Communications · api · mcp · Developer tools
MCP · Documentation checked: 2026-10-10Sendinel
Sendinel provides email operations through REST and MCP, including contact management, event tracking, campaigns, and transactional email.
Communications · marketing · api
API · Documentation checked: 2026-10-10Dialpad
Dialpad provides a customer experience and business communications platform. Its API can retrieve company account information.
Communications · business telephony · API
API · Documentation checked: 2026-10-11Infobip
Infobip offers a messaging API for sending SMS messages and receiving delivery reports.
Communications · Communications · api
API · Access documentation verifiedSuprSend
SuprSend provides an HTTP API for retrieving metadata about a subscriber list in a workspace.
notifications · Communications · API
API · Access documentation verifiedSignalWire
SignalWire provides communications APIs and a Datasphere document API for listing documents in a project’s knowledge workspace.
Communications · Developer tools · Public data
API · Access documentation verifiedClickSend
ClickSend offers a messaging API with REST endpoints for sending and managing communications.
communication · Communications
API · Access documentation verified46elks
46elks provides an HTTP API for SMS, MMS, voice and virtual phone numbers.
Communications · telephony · api
API · Access documentation verifiedDaily
Daily provides video and audio calling infrastructure, including a REST API for managing rooms and call resources.
video · Communications · Developer tools
API · Access documentation verifiedDevInbox
Email infrastructure for AI agents with a REST API for retrieving message counts from a mailbox.
Communications · Developer tools · API
API · Access documentation verified