"MCP servers that don't require API keys" matching MCP servers:

A comprehensive MCP server with RESTful API that enables file operations, command execution, project management, and AI integration for remote development control with security features and real-time communication.

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

MCP server that provides file operations and Moonshot API-powered tools (reasoning, code review, testing, research, web search, agent) for Kimi K2.5, requiring only a Moonshot API key.

Enables AI clients to read, write, search, and manage files in an Obsidian vault via MCP over SSE, running standalone without the Obsidian desktop app.

A bridge server that allows LLM tools to interact with an Obsidian vault through a local REST API, enabling file operations, note management, and metadata access through natural language.

Enables AI agents to read, create, update and delete any file in a mounted folder of markdown notes, patch individual headings, blocks or frontmatter keys, search by text or JsonLogic queries over frontmatter, tags and links, and stream note changes as events. Runs as a standalone container requiring no Obsidian installation and binds only to private networks such as Tailscale or WireGuard.

Lets AI assistants and editors read documents on the local machine, turning PDFs, scans, invoices, receipts and bank statements into structured fields, line items and entities over stdio. Runs fully self-hosted with no cloud calls or API keys, so sensitive files never leave the user's machine.

This server enables multi-agent conversations that interact with the Google Drive API, allowing agents to perform file operations, manage permissions, and handle Google Drive content through a standardized protocol.

Enables AI agents to inspect PDFs, merge or extract pages, and clean text entirely offline through the Model Context Protocol, with no uploads, API keys, or network calls.

An MCP server that gives Claude direct access to your reMarkable tablet's notebooks, enabling document search, PDF rendering, handwriting transcription, and diagram conversion, all locally without API keys.

local-first long-term memory for MCP agents (no DB, no API keys)

locidx

Enables AI agents to safely interact with local files by enforcing policies that allow, block, or require approval for actions, while protecting credentials and maintaining a tamper-proof audit log.

A local-first MCP server providing secure workspace file operations, offline full-text search, and web search/fetch capabilities without requiring API keys.

Enables MCP clients to browse, read, search and tag notes in a headless Obsidian vault on Linux through versioned filesystem access, including targeted heading, block and frontmatter reads plus binary attachment previews. Also supports guarded atomic writes, appends, patches, moves and recoverable deletes that require version matches before modifying existing notes.

Enables Claude to read and write to local Microsoft OneNote notebooks by parsing backup files and utilizing the OneNote COM API. It allows for searching notes, creating pages, and appending content without requiring Azure registration or API keys.

Enables MCP-compatible AI assistants to inspect and manage local or remote servers in plain language, covering system health, Docker containers, services, ports, disks, scoped files, and read-only database queries over key-only SSH. Write actions such as container restarts, file edits, and allowlisted dev commands require client approval.

Lets MCP-compatible AI apps read and update files inside Cryptomator vaults after the user unlocks them, keeping keys in memory and allowing changes to be undone.

Universal MCP server for Sublime Text 4 -- run editor commands, read/write views and selections, inspect tabs and project state, and eval_python in the plugin host for anything the typed tools don't cover. Companion plugins add DAP debugging (debugger-mcp) and LSP tools (lsp-mcp).

Exposes six stdio tools that let MCP clients such as Claude or Cursor seal files and short messages into hybrid post-quantum .arshield envelopes (ML-KEM-768 + X25519, ML-DSA-65 signatures) and open them again using the same keys — passphrase keyfiles or wallet-signature-derived keys — as the browser app.