Vextorium
How the probability of a Polymarket outcome moved over the last hour, day, week, month or all time, with max, min and change in percentage points.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 146 ms
- Price
- $0.004 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Forecasts, signals and predictions
- Address
- https://api.vextorium.com/v1/polymarket-history
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/fedaa5f889e8.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).