Marketplace · API · x402

x402-solvers.onrender.com/v1/cycles/probe

Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large — without the path.

Endpoint	`https://x402-solvers.onrender.com/v1/cycles/probe`
Trust	100% uptime over 1 checks · ~360 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	0xA238AF2e66D9d7301F2D02932931851DdF900Dcd
method	POST
last updated	2026-11-01T15:33:30.796Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-solvers.onrender.com/v1/cycles/probe
# 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/x402-38a1d169b202f0b5

Search the whole marketplace from your agent (MCP)

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