MCP servers for AI agents

An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. This section lists servers with their transport, auth method and environment variables, an install command and an access level with its reasons.

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Found: 3090

Official

Reverie keeps an AI agent's memory in a Neo4j graph: entities, typed relations, hybrid search and duplicate cleanup

Extended access67Repository stars
Official

Official HashiCorp Vault MCP server: mounts, KV secrets and PKI certificates from an agent

Broad access67Repository stars
Official

Remote Globalping MCP server: ping, traceroute, DNS, MTR and HTTP checks from thousands of probes worldwide, on request

Extended access66Repository stars
Official

Official Mailtrap MCP server: send email, test in the sandbox, read delivery logs, manage templates, contacts and domains

Broad access66Repository stars

Cartographer is a shared git wiki that agents read and extend through MCP tools while the server keeps it from breaking

Extended access66Repository stars

An MCP bridge between an agent and FreeCAD: 41 tools for parametric parts, CAM toolpaths, meshes and model diagnostics

Broad access66Repository stars

An MCP server with accurate Unity API docs for Claude Code and Cursor: signatures, namespaces and deprecated methods

Extended access66Repository stars

A VS Code extension that gives agents the Clojure REPL and structural form editing with built-in bracket balancing.

Extended access66Repository stars

An MCP server that finds and quotes the exact text of over 1.2 million Brazilian legal norms with a link to the official source

Extended access66Repository stars

A self-hosted issue tracker and wiki on Cloudflare with MCP: 126 tools, issue leases and file claims for several agents

Broad access66Repository stars

Overleaf MCP Server: LaTeX projects over Git

Overleaf MCP Server (YounesBensafia)

An agent reads and edits Overleaf project files through standard Git sync and pushes the changes to the project itself

Broad access66Repository stars

A deep research MCP server: multi-source search, result fusion and cited synthesis through a Qwen3 model on OpenRouter

Extended access66Repository stars
Official

Long-term memory for Claude Code, Cursor and Codex: the agent saves decisions and finds them again in later sessions

Extended access66Repository stars
Official

Official Norman Finance MCP server: invoices, bookkeeping, reconciliation and taxes for EU freelancers and small businesses

Broad access65Repository stars
Official

A WordPress plugin that turns a site into an MCP server so an agent edits Elementor pages, menus, SEO and reads the shop.

Broad access65Repository stars

An MCP server, CLI and SDK for agents: read and edit Excel workbooks, recalculate formulas, prove changes without UI automation

Extended access65Repository stars

Probe finds the network calls of an agent tool run without network and prepares a least-privilege policy draft

Extended access65Repository stars

A GitLab MCP with 86 tools: issues, merge requests, pipelines, wikis and files, a read-only mode and a launch both locally and remotely with OAuth

Broad access65Repository stars

Frequently asked questions

What is an MCP server?

An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. The agent calls its tools while it works.

How do I connect an MCP server to an agent?

The card lists how to run it (npx, uvx, docker or a remote URL) and the environment variables. A config snippet goes into the agent settings.

Do I need a key or a paid account?

It depends on the server. Each card states the auth method and requirements, including paid accounts, in the limitations block.