Top open Polymarket prediction markets for a topic, ranked by 24h volume: event title, end

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "limit": 3,
          "tag": "crypto"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "events": [
            {
              "end_date": "2026-07-13T12:00:00Z",
              "markets": [
                {
                  "probabilities": {
                    "No": 0.0015,
                    "Yes": 0.9985
                  },
                  "question": "Bitcoin above $105,000 on July 13?",
                  "volume_24h_usd": 297988.65
                }
              ],
              "slug": "bitcoin-above-on-july-13-2026",
              "title": "Bitcoin above ___ on July 13?",
              "volume_24h_usd": 1801399.98
            }
          ],
          "source": "Polymarket Gamma API (live on-chain prediction-market odds)",
          "tag": "crypto"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "limit": {
                  "default": 5,
                  "description": "Events to return",
                  "maximum": 10,
                  "minimum": 1,
                  "type": "integer"
                },
                "tag": {
                  "default": "crypto",
                  "description": "Polymarket tag slug, e.g. crypto, politics, economy",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://data.greeneris.io/v1/predict/polymarket"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://data.greeneris.io/v1/predict/polymarket");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://data.greeneris.io/v1/predict/polymarket")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header