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HARS-Zero Signal API – Sentiment Snapshot
x402
HARS-Zero Signal API – Sentiment Snapshot is a paid API for AI agents from hars.cryptotavern.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-18).
Returns a snapshot of current Polymarket prediction-market sentiment, listing active markets and their counts for AI agent consumption.
Price / call$0.005
Success—
StatusUnknown
How this service works
Polymarket prediction-market intelligence for AI agents. Pay-per-call in USDC via x402 protocol. Multi-chain: Base + Solana.
Output
Returns a JSON object containing a count of active Polymarket prediction markets and an array of market objects with associated metadata such as market titles, probabilities, and status. Can return an empty markets list if no results match the filter.
Example use cases
Pre-trade prediction market check
“Before I place any trades today, grab me a Polymarket sentiment snapshot so I can see what the crowd is currently betting on.”
Automated political event monitoring
“Every hour, fetch the Polymarket sentiment snapshot and flag any markets related to elections or political events that appear in the list.”
AI agent market briefing
“Give me a quick Polymarket intelligence briefing — I want to know how many markets are active right now and what they cover.”
Technical details
Endpoint
GEThttps://hars.cryptotavern.xyz/paid/sentiment-snapshot?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a real-time crowd-sourced intelligence snapshot from Polymarket prediction markets, particularly when building AI agents that incorporate probabilistic event forecasting or sentiment signals into their reasoning. Prefer this over general news or sentiment APIs when you specifically want market-implied probabilities rather than textual sentiment analysis.
Side effects
- Payment not received or insufficient USDC balance — returns HTTP 402 requiring x402 payment
- Invalid or malformed properties filter — may return empty markets array or error
- Polymarket data unavailable or upstream outage — returns empty count and markets array
- Network timeout on the x402 payment handshake — call fails before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "object",
"example": {
"count": 0,
"markets": []
}
}Tags
x402
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