{"protocolVersion":"0.3.0","name":"NythosX Agent Tools","description":"Pay-per-call tools for autonomous agents: current gas and fee prices across six chains (Base, Ethereum, Arbitrum, Optimism, Polygon, Solana) and web page to clean Markdown. Paid in USDC via x402 v2 on Base (Solana optional). This A2A endpoint answers free questions: supported chains, current Base gas, and the paid catalog.","url":"https://tools.nythosx.com/a2a","preferredTransport":"JSONRPC","version":"1.0.0","iconUrl":"https://tools.nythosx.com/favicon.svg","documentationUrl":"https://tools.nythosx.com/","provider":{"organization":"NythosX","url":"https://tools.nythosx.com"},"capabilities":{"streaming":false,"pushNotifications":false},"payment":{"protocol":"x402","asset":"USDC","networks":["eip155:8453"],"catalog":"https://tools.nythosx.com/api/catalog","mcp":"https://tools.nythosx.com/mcp"},"defaultInputModes":["text/plain","application/json"],"defaultOutputModes":["application/json","text/plain"],"skills":[{"id":"chains","name":"Supported chains (free)","description":"List supported chains and gas-unit constants. Ask: 'chains' or 'what chains do you support'.","tags":["free","chains"],"examples":["chains","what chains do you support"]},{"id":"gas-base","name":"Current Base gas (free)","description":"Live gas and fee tiers for Base, cached 30 s at the edge. Ask: 'gas base' or 'base gas now'.","tags":["free","gas","base"],"examples":["gas base","base gas now"]},{"id":"gas","name":"Current gas and fee prices for one chain","description":"Current gas and fee prices for Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: slow/standard/fast tiers and the USD cost of a transfer, USDC transfer and swap. Updated every 15 seconds. Paid: $0.002 USDC via x402 at GET https://tools.nythosx.com/v1/gas.","tags":["x402","paid"],"examples":["GET https://tools.nythosx.com/v1/gas?chain=base"]},{"id":"compare","name":"Where is it cheapest to send this transaction right now?","description":"Ranks all supported chains by the USD cost of a specific transaction type (transfer, USDC transfer or swap) at a specific speed tier (slow, standard or fast). Returns the sorted ranking, the cheapest chain and any chains that could not be queried. Paid: $0.005 USDC via x402 at GET https://tools.nythosx.com/v1/gas/compare.","tags":["x402","paid"],"examples":["GET https://tools.nythosx.com/v1/gas/compare?tx=usdc_transfer&tier=standard"]},{"id":"read","name":"Convert any web page into clean, readable Markdown","description":"Fetches a public web page and returns clean Markdown: title, byline, site name, excerpt, word count and the extracted article body. Use it to give an AI agent readable text from a URL without writing your own scraper. Respects robots.txt, blocks private hosts, follows at most five redirects, caps the page at 3 MB. Pass links=true to also get the page's outbound links. Paid: $0.003 USDC via x402 at GET https://tools.nythosx.com/v1/read.","tags":["x402","paid"],"examples":["GET https://tools.nythosx.com/v1/read?url=https%3A%2F%2Fexample.com&links=false"]}]}