data.greeneris.io predict polymarket

https://data.greeneris.io/v1/predict/polymarket

answers 402

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.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.01
Network: base
Pay to: 0x6ab8efe305cce67daa48c97bde29c04402822dff
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 96 ms
Payment options: 1 usable of 1
Last checked: 2026-08-15T14:25:21.775Z (1h ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fdata.greeneris.io%2Fv1%2Fpredict%2Fpolymarket"