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Greeneris Data – Polymarket Prediction Market Odds
x402
Greeneris Data – Polymarket Prediction Market Odds is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches live on-chain prediction market odds and 24h volumes from Polymarket, filtered by topic tag (e.g. crypto, politics, economy)
Price / call$0.01
Success—
StatusUnknown
How this service works
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.
Output
A JSON object containing the requested tag (e.g. 'crypto'), a list of up to 10 events each with their slug, title, end date, 24h volume, and nested market questions with live Yes/No probabilities and per-market 24h USD volume. Data sourced live from Polymarket Gamma API (on-chain).
Example use cases
Monitor election betting markets
“Pull the latest Polymarket odds on the upcoming election — what's the current crowd consensus on the top political events, and how much volume have they seen in the last day?”
Track Federal Reserve policy bets
“Show me what traders are betting on the Fed's next move — get me the live probabilities and volumes from the top macro prediction markets tagged with Fed policy.”
Scout emerging crypto narratives
“What are people actually betting real money on in crypto right now? Give me the top 5 most active prediction markets on Polymarket with the highest 24-hour volumes, so I can see what the crowd thinks matters.”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/predict/polymarketWhen to prefer
Use this endpoint when you need live, on-chain crowd-probability data from Polymarket for a specific topic category. Prefer this over scraping Polymarket directly or using generic web search, as it returns structured JSON with clean probabilities and volumes. Best for agents that need to quote current market consensus odds on crypto, politics, or macro events without building a full Polymarket integration.
Side effects
- Invalid or unrecognized tag slug returns empty events array or 400 error
- limit out of range (< 1 or > 10) returns validation error
- Polymarket API upstream outage causes 502 or timeout
- Payment not received (HTTP 402 returned with machine-readable quote before payment)
- Network or DNS failure reaching data.greeneris.io
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"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)"
}
}Tags
x402
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