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Live Elon Musk & Ted Cruz tweet feed, real-time tweet counters, and market data for Polymarket's tweet-count markets. Hosted remote server (streamable-http at https://polystrike.xyz/mcp); free tier is keyless.

MCP server for a full-stack note-taking application, exposing CRUD tools for notes with SSE transport for AI agent integration.

Analyzes password strength with entropy calculation and crack time estimation. Supports pay-per-call payments via x402 (USDC on Base L2) without requiring API keys or signup.

RSigma is a Rust detection-engineering toolkit for the Sigma standard. Its MCP server (rsigma mcp serve) exposes the toolchain to AI agents over stdio or Streamable HTTP, with tools to author, lint, validate, and convert Sigma rules, evaluate and explain detections against log events, and inspect correlation state.

Enables OCR text extraction from images via URLs or base64, with pay-per-call using x402 micropayments (USDC on Base L2).

NFT collection floor price, volume, holders, rarity data for Ethereum and Base via Alchemy. Pay-per-call via x402 (USDC on Base L2) without API key or signup.

AI-assisted PCB design for KiCAD 10. Native KiCAD plugin — a single Rust binary exposing 171 schematic, layout, routing, design-review, and manufacturing tools to Claude, or the LLM of your choosing

A MCP for NeuroAgents that assist clinicians and researchers: MNE processing + source imaging, a Postgres/BIDS data & EHR store, and NeuroII web visualization.

MCP server that gives an agent a real browser: url to markdown, screenshot a url, url to pdf. No signup.

MCP server exposing the Finn (finn-ai) agent as an ask_finn tool.

MCP server for graph-orchestrated LLM workflows — 25 typed tools, daemon/proxy architecture, checkpoint/resume, HITL approvals, and HMAC receipts.

Google Play Console MCP Server - Manage app releases, reply to reviews, query Android Vitals (Crashes/ANRs), and update store listings from your AI agent.

Sound notifications for Claude Code — play a sound when a task finishes, when Claude is waiting for approval, or when a subagent completes.

A11 MCP server — dev-time tools for coding agents building on A11

Read-only Remote MCP for externally grounded AI agent trust receipts.

Middle Eastern reference data: policy rates, VAT, wages, CPI, tax, holidays - 9 countries.

Marketplace-seller tools: listing audits, PPC kits, pricing, compliance. Paid via x402 or card.

UK case law MCP (21 tools). Free API key: casenode.ai/api/signup → Dashboard → API keys.

Search Ukraine's largest public collection of memorial and grave data, plus archival records.

Audit-first test strategy MCP server for repository-native test planning.