Popular MCP Servers

Local Ethereum wallet for AI agents — read balances and history, request payments that a human approves by password in the app popup, and fetch x402-paywalled resources with USDC on Base. Keys are encrypted on-device and never leave your Mac.

Instant, code-aware local search engine

Self-hosted MCP gateway that registers upstream MCP servers and fronts them behind one governed Streamable HTTP endpoint: per-tool access control by caller API key, guardrails over tool arguments and results, rate limits, and usage logs. The same Rust gateway also proxies LLM and A2A agent traffic.

Contract-first programming language with a local MCP server for checking types, effects, capabilities, and contracts in agent-written modules. Its review tool compares before and after source sets and returns receipts for new authority, weaker promise tiers, and new Guarded runtime obligations.

Version-control-native project memory for AI agents: an encrypted knowledge graph whose beliefs are staleness-checked deterministically against repo history — belief bisect names the commit that invalidated a fact, and agents write their own evidence-anchored beliefs via propose_belief. Also exposes changeset proposals and per-changeset token cost reporting; bridges to plain Git.

Persistent memory for AI coding agents, storing decisions, bug fixes, conventions, and discoveries in a local SQLite database and automatically recalling them when relevant. Works with Claude Code, Codex, Cursor, Gemini CLI, and other MCP-compatible agents.

Verum's MCP server turns any codebase into a deterministic, queryable fact layer — an agent can ask who calls a function, what a change impacts, where the dead code and duplicates are, which client calls hit which routes, and run a full security/quality audit. It returns byte-identical answers in a few hundred tokens instead of grepping and reading whole files.

Connects Claude and other MCP clients to Elasticsearch data, allowing users to interact with their Elasticsearch indices through natural language conversations.

Agent tools for the Ophis intent-based DEX: parse, quote, build, relay orders, look up fee tiers.

Codebase intelligence and context engine for AI coding agents: search, symbol lookup, impact analysis, and context building via MCP.

chrome-debug-mcp is an asynchronous Rust-based Model Context Protocol (MCP) server that allows AI agents and Large Language Models to natively debug Chromium-based browsers via the Chrome DevTools Protocol (CDP).

US/HK markets — 110 tools: real-time quotes, options, orders, fundamentals, alerts, DCA & portfolio

MCP server for searching French and European law, providing natural language access to jurisprudence, consolidated legal texts, and related legal information via tools like search_decisions and search_legal_texts.

Local-first persistent memory for Claude Code and OpenAI Codex CLI. A single Rust binary captures, distills, searches, and injects project memory across sessions via hooks, MCP, CLI, and localhost REST.

Audits any site's UX the way a design-literate reviewer would — contrast, tap targets, type scale, colour discipline, scan patterns, copy — and returns the rule, the source line and the exact fix.

Adaptive Epistemic Triage & Recall Engine (AETRE) — Bayesian Value-of-Information (VOI) and queueing operations engine for academic peer review, grant study sections, and venture capital dealflow.

MCP server for German public procurement data (OCDS). Semantic search, tender matching, and company profiles — all from your local LLM

Mimir is Perseus's external persistent memory backend — a lightweight Rust MCP server that stores cross-session facts so agents remember what they learned last week. Zero network calls, no API keys, just SQLite + FTS5 running alongside your workspace.

Autonomous LLM-powered web crawler with 17 browser tools and goal-driven agent. Single Rust binary with stealth browsing, provider-agnostic LLM support, and built-in MCP server.

Built-in MCP server in the FluxDown download manager: a Streamable HTTP endpoint (POST /mcp, JSON-RPC 2.0, Bearer auth) exposing 9 tools to add, list, pause, resume, and remove HTTP/FTP/BitTorrent/HLS downloads and manage queues.