"Free APIs and services without commercial fees" matching MCP servers:

Enables AI CLI agents to interact with WhatsApp using an unofficial multi-device API, supporting messaging, chat/group/channel management, statuses, and an AI-driven inbox without requiring an official API key.

Relays a result screenshot to Slack so you can review a coding agent's output without opening the app.

Enables comprehensive Google Meet and Calendar management through Google Calendar API v3 and Google Meet API v2, supporting calendar event creation with Meet links, space management, transcription, recording, attendance tracking, and meeting moderation controls.

Run free live audience Q&A and polls from your agent: start an AskOne room, add and launch a poll, approve or hide questions and mark them answered, close the room, then read the questions as a FAQ draft and get the results. Free AI moderation. Uses an organization API token from askone.org

Enables AI assistants to interact with LinkedIn and LinkedIn Sales Navigator for searching profiles, managing leads, and handling messaging via cookie-based authentication. It supports professional networking tasks such as sending connection requests and retrieving account details through the Model Context Protocol.

MCP server exposing the complete Placetel Web API v2 with 124 tools for managing telephony services, contacts, calls, and more.

Production-ready MCP server enabling AI assistants to interact with Braze's customer engagement platform, offering 92 tools for user management, messaging, campaigns, analytics, email/SMS, catalogs, and SCIM provisioning.

Connects a single Mail.ru mailbox to ChatGPT through Google OAuth and IMAP, enabling folder listing, email search, non-destructive reading, moving messages, and moving selected messages to the trash.

Combines KC Chat Panel session interaction with AgentDock computer control tools, enabling Cursor Cloud Agent to chat and operate the local machine via AgentDock.

A collection of MCP servers for Slack, Jira, Confluence, and release coordination to automate QA workflows and daily release status reporting.

Agent-native cold-email infrastructure providing ~12 high-level tools for domain setup, mailbox provisioning, campaign launch, inbox management, and metrics, all operated via MCP or CLI.

MCP server that lets AI agents cross-post content to Telegram, Discord, Mastodon, Bluesky, and Reddit — using free APIs only.

Provides a set of tools to interact with Sinch APIs for messaging, voice, verification, and email services, enabling users to send messages across different channels, perform phone verifications, make voice calls, and manage email communications.

lets you interact with your meeting data (to list, ask, summarize, extract - virtually anything about your meeting) through Claude’s desktop client across Zoom, Google Meet and MS Teams via tl;dv.

Enables scheduled AI workflows to route notifications to QQ and Telegram via REST, MCP, or Gmail, with retries and audit, without the relay calling paid LLM APIs.

Enables AI sessions across machines and terminals on a local network to message one another, share records, and distribute parallel tasks to workers without cloud services or accounts.

Enables AI assistants to interact with all Twilio APIs through the Model Context Protocol. Supports SMS, voice, messaging, and other Twilio services with secure authentication and configurable API filtering.

Enables AI agents to send free and paid faxes to US and Canada numbers, check fax status, and purchase prepaid credits, all without leaving the chat.

An implementation of the Model Context Protocol (MCP) server that exposes Twilio APIs to AI assistants and tools, allowing them to interact with Twilio services through the MCP protocol.

Enables integration with JustCall APIs through function calling for managing telephony and communication services. Allows users to interact with JustCall's phone system capabilities through natural language using secure API authentication.

Enables direct agent-to-agent messaging, file transfer, and persistent conversation history between AI agents across machines via a private broker, without needing shared channels or third-party services.

An MCP server that exposes 17 Google Workspace APIs (e.g., Gmail, Drive, Calendar) as auto-generated tools for AI assistants, enabling natural language control of Google services.

Enables AI agents to notify users via Telegram or Discord when tasks complete, then wait for and receive the user's reply as the next instruction within the same session.

Enables AI assistants to send real faxes through the FaxDrop API. Provides safeguards including rate limiting, dry-run mode, and audit logging for secure fax operations.

Enables uploading local files to Slack with a message, supporting channels, DMs, threads, and file titles.

Enables remote control of the Cursor AI agent via chat platforms like GitHub Issues or Telegram, allowing users to start sessions and receive summaries and prompts in a chat thread.

Enables Claude to make outbound phone calls through Vapi API, supporting any call type and language with features like call initiation, result polling, and structured data extraction.

Enables AI agents to prompt users for input directly within the chat UI using MCP's elicitation capabilities, allowing for interactive multi-turn conversations without leaving the conversation interface.

Enables AI agents to prepare, preview, quote, and send approved faxes, track delivery and evidence, read inbound faxes, extract data, and request human approvals through a fax API.

Turns team chat (Slack, Discord, MS Teams, Mattermost) into a living knowledge base - a typed knowledge graph plus auto-generated wiki - exposed to AI agents through a 28-tool MCP server with semantic search, expert finding, and decision tracing.