# NythosX Agent Tools

> 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.

- **Domain**: `tools.nythosx.com`
- **Provider**: NythosX (https://tools.nythosx.com)
- **A2A protocol version**: 0.3.0
- **Kind**: paid_api
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 100%
- **Payment protocol**: x402 · network `eip155:8453` · ≥ $0.001
- **Wallet**: `0x803522d25f7b6f2e6df006650cdc032e644057a2`

## Skills
- **Supported chains (free)** — List supported chains and gas-unit constants. Ask: 'chains' or 'what chains do you support'.
- **Current Base gas (free)** — Live gas and fee tiers for Base, cached 30 s at the edge. Ask: 'gas base' or 'base gas now'.
- **Current gas/fee tiers and USD costs for one chain** — Slow/standard/fast gas tiers and USD cost of a transfer, USDC transfer and swap, for Base, Ethereum, Arbitrum, Optimism, Polygon or Solana. Updated every 15s. S
- **Where is it cheapest to send this transaction right now?** — Ranks all 6 supported chains (Base, Ethereum, Arbitrum, Optimism, Polygon, Solana) by USD cost for a transaction type (transfer, USDC transfer or swap) at a spe
- **USD cost of a custom gas limit or compute-unit budget** — Prices an arbitrary transaction, not just the 3 canned types get_gas_price/compare_gas_costs cover: pass your own gas limit (EVM chains) or compute-unit budget 
- **USD price of a chain's native token, no gas data** — Just the native-token USD price (ETH, POL or SOL), sourced from MEXC/Gate.io/Coinbase with the same price feed get_gas_price uses. Use this when you only need t
- **Convert any web page into clean, readable Markdown** — Fetches a public web page and returns clean Markdown: title, byline, site name, excerpt, word count and article body. Respects robots.txt, blocks private hosts,
- **Check if a URL is reachable before paying to read it** — HEAD request following up to five redirects: status code, final URL, content-type, content-length and last-modified — no page body fetched or charged for conten

## URLs
- Agent card: https://tools.nythosx.com/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/tools.nythosx.com
- Documentation: https://tools.nythosx.com/