Marketplace · API · x402

chainhilt.ai/api/v1/predict/polymarket/markets/search

Search prediction markets. `closingAfter`/`closingBefore` bound the venue query; other filters apply after fetching `limit` rows, so a page can be short or empty while `nextCursor` is set: keep paging until it is absent. `sort=closingTime` lists open markets closing soonest; with `closingBefore` it finds short-horizon markets such as the 5-minute crypto up/down slots, which text `query` search never returns. Errors: 400 invalid query or cursor, 502 venue failure.

Use it

Call it (an x402 client pays automatically)

curl -i https://chainhilt.ai/api/v1/predict/polymarket/markets/search
# 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/x402-806b52575c472fdc

Search the whole marketplace from your agent (MCP)

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

Related

• Prediction market odds (Polymarket) (AIPayGen)
  API$0.001/call