"An MCP server that does not require API configuration" matching MCP servers:

MCP server for the Stashcat messenger API. Enables AI assistants to read and send messages, manage channels, conversations, files, polls, and more.

Experimental server that implements the Model Context Protocol (MCP) for Nylas API, providing resources, tools, and prompts to help developers integrate email, calendar, and contacts functionality with AI applications.

Enables to interact with Nylas API for email, calendar, and contacts via MCP, providing documentation, code samples, and code generation tools.

Japanese calendar API for AI agents. Provides Rokuyo, Rekichu, Eto, 24 Solar Terms, and fortune judgments. MCP + REST API.

Exposes the Appointment Scheduler API to AI agents as an MCP server, enabling them to list users and services, check availability, book, list, and cancel appointments via natural language.

Measures the shape of idle time in a booking calendar. Separates gaps that can actually be sold from structurally unsellable dead time, accounting for turnover time and the booking start grid. Fully offline, no API key required.

MCP server for the Shiftyasan public solver API, letting AI agents validate and solve shift-scheduling problems, with async job polling for large cases.

MCP server that wraps the AddEvent Calendar & Events API v2, allowing Claude to create, search, retrieve, update, and delete events, calendars, and RSVP attendees, plus list timezones.

Enables AI assistants to discover and book local service businesses like barbers, plumbers, and mechanics directly through MCP-compatible tools.

Provides Japanese national holidays, wareki (era) conversion, and date information. Works fully offline with no API keys required.

Enables agents to interact with a clinic booking API, including listing specialties, doctors, and a patient's appointments, and booking or cancelling appointments when the active profile permits, while preserving the caller's authority and screening tool descriptions for safety.

Enables AI agents to interact with Microsoft Teams through Microsoft Graph API, using delegated device-code authentication to act on behalf of the user.

MCP server for the eRezo API that enables managing professional contacts and events directly from Claude, including listing, creating, updating, and deleting contacts, as well as event registration.

Enables MCP-compatible clients to manage Reclaim.ai tasks, including listing, creating, updating, completing, deleting, and timer operations through natural language.

A local MCP server that lets Claude read macOS Mail.app via JXA, with tools for listing accounts/mailboxes, searching and reading messages. Read-only by default, with optional opt-in write tools for compose drafts and Apple Calendar events.

Enables MCP clients to access Stardew Valley calendar data, including current date, daily events, villager birthdays, weekly birthdays, and full seasonal calendars, through a local HTTP bridge to the HelloStardew mod. It provides read-only tools with structured success or error responses for natural-language use.

Enables interaction with Outlook Web through its internal API, supporting email search, folder listing, email retrieval, read state changes, calendar events, and reply drafts without Microsoft Graph or COM.

Official local MCP server for Garoon, enabling AI assistants to interact with the Garoon groupware platform through tools like schedule retrieval and user management.

An MCP server that enables scheduling, updating, deleting, and listing calendar appointments through Cal.com's Calendar API.

Enables AI agents to manage Meetergo calendars by finding slots, booking, rescheduling, and canceling appointments.