Marketplace · API · x402

chainsscope.duckdns.org/tools/fee-estimate

Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful for an agent about to construct a transaction itself.

Endpoint	`https://chainsscope.duckdns.org/tools/fee-estimate`
Trust	100% uptime over 1 checks · ~433 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34
method	POST
last updated	2026-11-11T06:02:22.907Z

Use it

Call it (an x402 client pays automatically)

curl -i https://chainsscope.duckdns.org/tools/fee-estimate
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-eec8b3d2c6e16bbd

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}