"Academic Research Tools for Finding, Downloading, Reading, and Writing Articles" matching MCP connectors:

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

Paid pre-execution risk verification for AI agents over MCP and x402.

Pay-per-call MCP tools via x402 USDC: ZAR prices, data extraction, Python sandbox, SA flights.

Proof and repair for Apple coding agents: validate Swift, run Xcode evidence, and repair failures.

Read-only Animica chain data, free AI inference, verifiable quantum randomness, and mining stats.

Engineering calculation MCP server for oil and gas engineering applications.

Scientific compute for AI agents: symbolic, numerical, quantum, chemistry, ODE. Paid via x402.

MCP server for Klever blockchain smart contract development.

Docs for hot-module-reload and reactive programming for Python (`hmr` on PyPI)

40+ developer tools from Context7, Code Runner, Python Execute, NPM Sentinel, PlantUML, and Microsoft Learn. Docs lookup, code execution, security scanning. Starts at $0.01/call. Get your API key at app.xpay.sh or xpay.tools

Precision math engine for AI agents. 203 exact methods. Zero hallucination.

Protects AI coding agents from installing malicious open source packages. Every npm and PyPI package is checked against SafeDep’s real-time threat intelligence before installation.

Generate a Flutter app from a JSON spec free; pay only for the compiled APK (USDC on Base).

Provides access to TakeProfit.com's Indie documentation and tooling — a Python-based scripting language for building custom cloud indicators and trading strategies on the TakeProfit platform.

Anima MCP connects your AI coding assistant directly to Anima Playground. It bridges the gap between PM prototypes and production code.

Personal assistant MCP server with search, execute, packages, jobs, secrets, and integrations.

Persistent cloud development environments that coding agents create, run and test software in.

Build Apps and run code in 30 languages — sandboxed, with persistent sessions for agent loops.

Pay-per-call DNS/TLS truth and npm/PyPI breakage checks via x402. No account or API key.

Run, build, and validate firmware on virtual hardware from your AI agent. Hardware knowledge corpus.