The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Xpay Academic Research listing page.
980+ AI tools available as MCP servers. Pay $0.01/call in USDC via the x402 protocol. One API key, 30+ providers — no individual provider accounts or subscriptions needed.
Sign up at app.xpay.sh and create an API key. Add credits to your wallet (USDC on Base).
Claude Desktop / Cursor / Windsurf — add to your MCP config:
Claude Code CLI:
Replace YOUR_API_KEY with your key from step 1.
Your AI assistant will automatically discover all available tools. Each tool call costs $0.01 USDC, deducted from your wallet balance.
Instead of connecting to all 980+ tools, you can connect to a focused collection:
| Collection | Endpoint | Tools | Providers |
|---|---|---|---|
| All Tools | https://mcp.xpay.sh/mcp?key=YOUR_API_KEY | 980+ | All 30+ |
| Lead Generation | https://lead-gen.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~50 | Hunter, Apollo, Tomba, Sixtyfour, Fiber, Exa, Nyne |
| Competitive Intel | https://compete.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~40 | Brand.dev, Coresignal, Keywords Everywhere, Exa, Firecrawl, Shofo |
| Content Research | https://content.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~40 | Perplexity, Tavily, Semantic Scholar, FLUX, Ideogram, Recraft |
| Web Scraping | https://scraping.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~35 | Firecrawl, Bright Data, Jina, Olostep, ScrapeGraph, Notte |
| Developer Tools | https://devtools.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~30 | Context7, Code Runner, Python Execute, NPM Sentinel, PlantUML |
| Finance | https://finance.mcp.xpay.sh/mcp?key=YOUR_API_KEY | 253 | Financial Modeling Prep, Alpha Vantage, AkShare, Polymarket |
| Media Studio | https://media.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~25 | FLUX, Ideogram, Recraft, Stability AI, MiniMax, Kokoro |
| Social Media | https://social.mcp.xpay.sh/mcp?key=YOUR_API_KEY | 96 | ScapeCreators, Shofo, YouTube |
| Academic Research | https://research.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~30 | Semantic Scholar, Google Scholar, PubMed, arXiv |
| Marketing | https://marketing.mcp.xpay.sh/mcp?key=YOUR_API_KEY | ~30 | Keywords Everywhere, Brand.dev, Exa, Tavily, Ideogram |
No individual provider API keys. No separate accounts. One key for 30+ providers.
x402 is an open protocol for machine-to-machine payments using HTTP 402 Payment Required. When a tool call requires payment:
402 Payment Required + a payment invoice@xpaysh/x402 — x402 facilitator SDK@xpaysh/n8n-nodes-xpay — n8n community node@xpaysh/agent-kit-langchain — LangChain integrationMIT