Index onlineMerchant portal
Api Endpoint

Polymarket Predictor

Top open Polymarket prediction markets for a topic, ranked by 24h volume: event title, end date, and per-market outcome probabilities (0-1) with USD volume, from the public Gamma API (live on-chain odds). Query: ?tag=crypto|politics|economy|fed|... (any Polymarket tag slug) &limit=1-10 (default crypto, 5). JSON, 5min cache.

Open interactive test console

Offering

Provider
data.greeneris.io
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Prediction Markets
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://data.greeneris.io/v1/predict/polymarket
MIME type
application/json
First seen
2026-10-16T01:50:19.913Z
Last seen
Tags
prediction-markets, polymarket, probabilities, Events, Macro, Crypto

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff"
  }
]

Observed health

Status
Healthy
Latest latency
98 ms
Average latency
287 ms
HTTP status
402
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "tag": {
          "type": "string",
          "description": "Polymarket tag slug, e.g. crypto, politics, economy",
          "default": "crypto"
        },
        "limit": {
          "type": "integer",
          "minimum": 1,
          "maximum": 10,
          "description": "Events to return",
          "default": 5
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "json",
  "example": {
    "tag": "crypto",
    "events": [
      {
        "slug": "bitcoin-above-on-july-13-2026",
        "title": "Bitcoin above ___ on July 13?",
        "markets": [
          {
            "question": "Bitcoin above $105,000 on July 13?",
            "probabilities": {
              "No": 0.0015,
              "Yes": 0.9985
            },
            "volume_24h_usd": 297988.65
          }
        ],
        "end_date": "2026-07-13T12:00:00Z",
        "volume_24h_usd": 1801399.98
      }
    ],
    "source": "Polymarket Gamma API (live on-chain prediction-market odds)"
  }
}