NanoTools
x402-paid MCP server with 44 micro-tools for AI agents: Google Trends, SERP, SEO audits, screenshots, weather, FX rates, whois, RSS.
Documentation
NanoTools — x402 pay-per-call API for AI agents
44 tools. No signup. No API keys. Pure x402 micropayments on Base mainnet.
Agents pay per call with USDC ($0.001–$0.03) via the x402 protocol — the HTTP 402 flow is fully automatic with any x402-capable client/wallet.
🔗 Discovery endpoints
| What | URL |
|---|---|
| Tool catalog for LLMs | https://nano.stacknodehost.com/llms.txt |
| OpenAPI 3 spec (x402 prices in extensions) | https://nano.stacknodehost.com/openapi.json |
| x402 discovery | https://nano.stacknodehost.com/.well-known/x402 |
| A2A agent card | https://nano.stacknodehost.com/.well-known/agent.json |
| Health | https://nano.stacknodehost.com/health |
🧰 Tool groups
- Trends & SERP — Google Trends (timeline, related queries, regions), Google SERP, Yandex SERP, wordstat regions
- SEO — meta audit, robots.txt audit, readability audit, IndexNow submit
- Chromium tools — page screenshot, page PDF, OG-image generation (real headless Chromium)
- Data — weather (open-meteo), FX rates (ECB), whois (RDAP), RSS parse
- Utilities — QR, JWT, cron parse, hash, uuid, base64, url encode, slug, datetime, ... ($0.001 tier)
💳 Payment
x402 ExactEvmScheme on Base (eip155:8453), payTo 0x4F568Bf0cE8537CBE7a0DAF1A43C955e0a648db9,
facilitator https://facilitator.openx402.ai. Prices are declared per-tool in the discovery endpoints
(x-price-usd extension in OpenAPI).
🚀 Quick start with any x402 client
Point your agent at any tool URL from llms.txt — the first call returns 402 with payment requirements,
the client signs USDC, retries with X-PAYMENT header and gets the result.