Marketplace · API · x402

x402-mcp.onrender.com/base/tx-decision

Should I submit this Base transaction now, and at what fee? One call returns submit-or-wait, max fee per gas and priority fee in gwei (EIP-1559), and the estimated cost in USD for an ETH transfer, USDC ERC-20 transfer, or x402 settlement on Base mainnet. Live gas price and congestion from Base RPC blocks, no API key. For bots that queue transactions: call before every send.

Endpoint	`https://x402-mcp.onrender.com/base/tx-decision`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~477 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	0x0d25A44f74868eCE53B305C97139CF4B62963410
method	GET
last updated	2026-11-07T11:48:22.051Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-mcp.onrender.com/base/tx-decision
# 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-e2c3df684519a969

Search the whole marketplace from your agent (MCP)

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